2009 addenda synopsis w exec summary - all sections

HSB Global Standards – Code Services

Technical Service Bulletin

2007 Edition, 2009 Addenda ASME Boiler & Pressure Vessel Code

Synopsis

All ASME B&PV Code Sections

Codes and Standards Group

October 2009

HSB Code Services ASME Boiler and Pressure Vessel Code

2007 Edition, 2009 Addenda Synopsis – Executive Summary

2009 ASME Code Edition Synopsis The 2009 Addenda to the ASME Boiler and Pressure Vessel Code was published on July 1, 2009, and includes revisions, additions and errata approved in 2008/2009 by the ASME B&PV Committee. The mandatory implementation date for the 2009 addenda revisions is six months from the date of publication, or January 1, 2010. As always, the 2007 Edition / 2009 Addenda may be optionally implemented upon receipt. Approximately 490 changes are itemized in this Synopsis. Many of these changes are the result of new technology and/or at the request of Certificate Holders like you. This Synopsis also includes a listing of Code Cases that have been newly approved or revised between May 2008 and February 2009. Many of the cases listed in our Synopsis have not yet been published in hard copy by ASME but are scheduled to be published in an upcoming Supplement, or can be obtained from ASME prior to publication. Please contact the Home Office Staff for further assistance. This Synopsis was prepared by the HSB Global Standards Code & Standards Staff to provide insights into the intent of these changes, and their potential impact on Code users. Each item that passed the ASME B&PV Standards Committee for the 2009 Addenda was entered into the database, the Synopsis “Subject” and “Description” were created by HSB CT personnel involved with the cognizant Code Section Standards Committee, and each entry was verified that it made it into publication. Commentary on revisions represents HSB CT's opinion of the changes, and is not intended to be an official interpretation of the ASME Code. Every effort was made to accurately describe the addenda changes. However, we caution Code users to always refer to the actual Code rules that apply and to use this document as a supplementary tool to the Code. Please contact HSB CT’s Codes & Standards Group if further background information is desired on any of the revisions or Code Cases published. The following Executive Summary highlights the more noteworthy revisions. We hope you find this information helpful. If you need further clarification, please contact your Inspector, Supervisor, or the Codes & Standards Staff. Thomas P. Pastor, P.E. Vice President, Codes & Standards HSB Global Standards

Any questions or comments on this document may be directed to:

Thomas P. Pastor 860-722-5615 [email protected] (all non-nuclear Sections) Jay Cameron 860-722-5653 [email protected] (all non-nuclear Sections) Bob Wielgoszinski 860-755-5064 [email protected] (Sections I & IV) Alex Garbolevsky 860-722-5098 [email protected] (Sections III, V) Wil LaRochelle 860-722-5662 [email protected] (Section III) Sandy Babka 860-722-5197 [email protected] (Sections VIII & X) Nino Olivares 860-722-5661 [email protected] (Sections VIII, IX & XII) Paul Fisher 630-955-5660 [email protected] (Section XI) Jay Vattappilly 860-722-5392 [email protected] (Sections I & VIII)



TABLE OF CONTENTS

EXECUTIVE SUMMARY .................................................................................E-1 through E-14 SECTION I – POWER BOILERS .................................................................................................1

SECTION II – MATERIALS ........................................................................................................6

SECTION III, DIVISION 1 – RULES FOR CONSTRUCTION OF NUCLEAR FACILITY COMPONENTS (including Subsection NCA – General Requirements for Divisions 1 and 2).....................10

SECTION III, DIVISION 2 – CODE FOR CONCRETE REACTOR VESSELS AND CONTAINMENTS ...............................................................................................................18

SECTION III, DIVISION 3 – CONTAINMENT SYSTEMS FOR STORAGE AND TRANSPORT PACKAGINGS OF SPENT NUCLEAR FUEL AND HIGH LEVEL RADIOACTIVE MATERIAL AND WASTE.......................................................................19

SECTION IV – HEATING BOILERS ........................................................................................20

SECTION V – NONDESTRUCTIVE EXAMINATION ...........................................................23

SECTION VIII, DIVISION 1– PRESSURE VESSELS ............................................................26

SECTION VIII, DIVISION 2 – PRESSURE VESSELS - ALTERNATIVE RULES ..............38

SECTION VIII, DIVISION 3 – ALT. RULES FOR HIGH PRESSURE VESSELS ...............48

SECTION IX – WELDING AND BRAZING QUALIFICATIONS ..........................................52

SECTION X – FIBER-REINFORCED PLASTIC PRESSURE VESSELS ...............................57

SECTION XI – RULES FOR INSERVICE INSPECTION OF NUCLEAR POWER PLANT COMPONENTS ......................................................................................................58 SECTION XII – RULES FOR CONSTRUCTION AND CONTINUED SERVICE OF TRANSPORT TANKS...........................................................................................................65



General Code Revisions 2009 Addenda

2009 Addenda changes are noted with an “A09” in the margin in the Code Book. You will also note that the header to each page will include "2009b” to identify the year in which this page was published and which addenda cycle. The letter "b" signifies that this is the second Addenda to the 2007 Edition. Manufacturer’s Data Reports would still use “2009 Addenda” or “A09” rather than “2009b Addenda: or “A09b”. Code Revisions by Sections Section I Clarified Reinforcement Rules for Multiple Openings: It was not clear to the Code users that the requirements of PG-32 must be met for ligaments designed per PG-52 and PG-53. For example, for components such as headers with a definite pattern of the holes designed using the ligament rules given in PG-52, the designer must also verify that the maximum hole in this pattern does not exceed the maximum diameter given in PG-32.1.2. This was clarified by adding references to PG-32.1.2 in PG-52.1 and PG-53.1. In addition, PG-32.1.2, PG-32.1.3, PG-32.1.4, PG-33.1 and PG-35.1 were revised to incorporate information from Fig. PG-32 and Fig PG-32 which were deleted. Deletion of Table PWT-10 During deliberation of the new weld strength reduction factors in PG-26, Table PWT-10 came under scrutiny and the Committee questioned its value. Table PWT-10 merely represented some specific applications of the rules provided in PG-27.2.1 and it was decided to delete it along with the associated references. Revised P-No. 1 Postweld Heat Treatment (PWHT) Exemptions: Table PW-39 PWHT Table for P-No.1 materials was revised to expand the current exemptions from PWHT, based on carbon equivalence, nominal thickness, and the application of preheat when required. Under General Note (a) (1), in the 2008 Addenda, PWHT was mandatory for all longitudinal butt welds regardless of thickness. The revision in the 2009 addenda now extends the exemption based on thickness up to 3/4 inch for all groove butt or combination groove and fillet welds, independent of whether it is a circumferential or longitudinal joint. Similar exemption criteria were incorporated into the rules of ASME B31.1 2004 Edition (2006 Addenda) and Section VIII, Division 2 2007 Edition. PW-40.2 was revised to complement the revisions of Table PW-39 under this action. PW-39.3 was revised to ensure Code users are correctly applying the thickness considerations when performing welded repairs of fabrication and material defects.

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Added Rules for Re-Stamping of Boilers: New Mandatory Appendix III provides criteria for reapplication of an ASME Code symbol stamp and covers the situation where the ASME Code Symbol stamping has become indistinct or that nameplate is illegible or lost, but traceability to the original certification can be established. When requested by the Owner, the reapplication of the ASME Code Symbol Stamp shall be performed by the original Manufacturer of the Code item or a successor organization. The reapplication shall be authorized and witnessed by an AI, and it shall be documented on a "Certificate of Conformance for Reapplication of the ASME Code Symbol Stamp" (Form III-1A). This reapplication of the ASME Code Symbol is viewed only as restoring evidence of original compliance with ASME Section I requirements. Section II, Parts A, B & C Forty-one (41) new editions of ASTM, AWS and other (EN) specifications have been adopted as ASME specifications. This brings the specifications significantly more up to date with current material production technology. Included in these adoptions were 3 entirely new ASME specifications: (1) SB-653/SB-653M for seamless and welded zirconium fittings, (2) SB-956 for forge-welded copper alloys tubes with integral fins made from SB-543 welded tubes, and (3) SF-467 N05500 nuts. Section II, Part D Some of the additions include incorporation of 2 Code Cases: 2419 (SA-268 TP430Ti/UNS S43036 for Section VIII, Div. 1), and 2358 (SA-1010 UNS S41003 Grades 40 & 50 for Section VIII, Div. 1). Section III NCA-1140 ─ Design Certification Approval Date Under the new USA regulatory rules, a Design Certification is approved for 15 years to a specific Code Edition and Addenda under this new licensing by NRC, and the Code Edition cannot be changed without NRC approval. Later Codes, as endorsed in 10 CFR 50.55a, must be considered by combined license (COL) commitment. The previous rules of NCA-1140 required the construction Code Edition to be no earlier than 3 years prior to the application or the latest endorsed by the regulator. This new change was made to accommodate the new licensing changes.

NB/NC/ND/NE/NF/NG/WB/WC-2360(b) and CC-2528(b) ─ Charpy V-Notch Test Machine Calibration Source Material

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This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST. Tables NB/NC/ND/NE/NF/NG-4622.1-1 ─ Changed P-No. 5B Group 2 to P-No. 15E Group 1 With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation.

NF-4121.1 ─ The ANI, Inspector, and Inspection References to “ANI”, “Inspector”, and “Inspection” were removed in various locations within Subsection NF. The involvement of an Authorized Nuclear Inspector for supports is no longer a requirement since the NPT Certificate was replaced with an NS Certificate beginning with the 1999 Addenda of ASME Section III. The NS Certificate only requires an annual audit by the ANI Supervisor instead of the continuous ANI involvement required for welded supports. Section IV Deletion of Figure HG-320 Fig. HG-320 which provided a graphical method for determining when an opening is inherently reinforced, and therefore does not require reinforcement calculations, was removed. The Figure limited the maximum permissible diameter of openings to 8 inches (200 mm) with no technical justification. The equation provided in HG-320.3(d) is easier to use and gives more accurate results. Section I deleted Fig. PG-32 which deals with the same subject.

HG-101(b) - Clarification of Service Restrictions HG-101(b) included the words "and/or" which can be interpreted as "and" or "or." Logically and literally, it permitted application to hot water heating boilers that met any of the following conditions: 1. MAWP not exceeding 160 psi and Temperature not exceeding 250°F 2. MAWP not exceeding 160 psi or Temperature not exceeding 250°F 2a. MAWP not exceeding 160 psi and Temperature exceeding 250°F 2b. MAWP exceeding 160 and Temperature not exceeding 250°F This was not the intent. HG-101.1 was revised to clarify that hot water heating boilers and hot water supply boilers may be constructed to the rules of Section IV when operating at pressures not exceeding 160 psi (1100 kPa) and at temperatures not exceeding 250°F (120°C).

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Clarified Requirements for Projection of Watertubes HG-360.3(b) was revised to make the rules for projection of water tubes beyond a tubesheet consistent with Section I. When the ends of tubes are flared, they shall extend beyond the tubesheet a distance not less than 1/4" (6 mm) or more than 1/2 in. (13mm). The technical reasoning for these limits is to make sure the flare has enough material to contribute to the anchoring of the tube yet not so much that there is danger of splitting the tube. For tubes that are not flared, there is no technical reason to limit projection.

Deleted Tables HF-301.1 and HF-301.2 Diameter-based minimum thickness requirements similar to Table HF-301.1 and Table HF-301.2 have been in the Code since the 1914 edition. Based on the successful experience of 57 years in Section VIII and 43 years for boilers other than firetube in Section I, the diameter-based minimum thickness requirements of Table HF-301.1 and Table HF-301.2 were deleted.

Revised Thickness Requirements of Fillets and Transitions HA-303(b) was revised by changing the thickness requirement of fillets and transition sections between main pressure containment walls from "one (1) times the thickness of the thinner sections being joined" to "one-half (1/2) the thickness of the thinner sections being joined". This change has been a proven design practice based on a burst test of seven (7) times design pressure and is analogous to the existing requirements in Section VIII, Division1 UCI-37(a).

Etching of Code Symbol Stamp – HG-530.1 & HLW-602.3 This action permits the application of the Code Symbol to boilers and water heaters by etching when there is insufficient space to provide a hard stamp or fit a nameplate using standard sized characters. Many of the newer design coil water heaters and boilers could use this application.

Use of Austenitic Stainless Steel In Lined Water Heaters Table HLW-301 was revised to permit the use of austenitic stainless steel for water heaters lined in accordance with HLW-200. Although all the conditions necessary for chloride induced intergranular stress corrosion cracking can be encountered on the water-side of an HLW item, the linings (inert barrier coatings) which protect carbon steel materials from corrosion in these environments are suitable for isolating stainless steel from aqueous chlorides and preventing this form of corrosion. Use of Sheet / Plate with Revised Min. Thickness (Part HLW) New Code Case 2615 permits sheet or plate material less than 1/8 in. (3 mm) to be used in HLW water heater and storage tank construction if:

(a) The material is not less than 3/32 in. (2.5 mm) (b) The material is listed in Table HLW-300 or Table HLW-301

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(c) The material is used only for a cylindrical shell, no portion of which is heating surface (d) Welding procedure and performance qualification is performed in accordance with Section IX and the additional requirements of Part HLW.

Section V Three (3) new editions of ASTM testing standards have been adopted as ASME standards. This brings the ASME standards significantly more up to date with current NDE technology. Revisions to Article 2 Mandatory Appendix VIII - Revisions clarify ambiguous language and allow phosphor imaging plate image brightness to be "judged" in a manner similar to judging of density on a film radiograph. IQI Sensitivity, image brightness and negative and positive image formats are explained. The last sentence of VIII-210 SCOPE was deleted as it pertained to an analog image that is to be digitally acquired, displayed and stored, thus Appendix III had no applicability to Appendix VIII. Article 2 Mandatory Appendix IX - A new Mandatory Appendix IX was added for the Digital Radiographic (DR) method. In this method, the radiation detector is in motion during exposure, but it does not require that either the source or the object be in motion. Also, in this method, a digital image is acquired directly by the radiation detector; there is no intermediate step such as in scanning a radiographic film for digital archiving or scanning a phosphor plate. This technique enables the digital radiograph to be immediately available to the examiner for evaluation. Article 4 Mandatory Appendix VI - Mandatory Appendix VI was added to bring the E-Scan and S-Scan phased array linear scanning technique requirements of Code Cases 2599 and 2600 into the Code. T-190 – This paragraph was revised to indicate that the Code user is responsible for Records/Documentation and to clarify that documentation is prepared in accordance with the requirements of the referencing Code Section and Section V. Furthermore, documentation requirements for procedure demonstrations addressed in T-150 (a) and (b) had not been previously addressed, but are now incorporated by this revision. T-675.2(b) - The paragraph was revised to allow developer used in conjunction with solvent-removable penetrant to be applied as soon as practical after the excess penetrant is removed. Documentation Requirements for Performance Demonstrations - Requirements for performance demonstrations and their associated documentation belong in the referencing Code. Requirements previously imposed by nearly one dozen references in Section V have been deleted.

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Section VIII, Division 1 UG-37(h) Split Reinforcement Pads The current Code neither prohibits nor defines requirements for the use of split reinforcing pads on nozzles. These new rules for split reinforcing pads were added to UG-37(h) to address the possibility that failure of the weld connecting the pad segments could result in loss of reinforcement of the opening. To address this concern, the amount of reinforcement area one can take credit for the pad is reduced by 25% unless: (1) the weld attaching the segments is a butt weld that is radiographed or ultrasonically examined to confirm full penetration, or (2) for openings in cylinders, the weld attaching the segments is oriented at least 45 degrees from the longitudinal axis of the cylinder (see sketch). Note that for openings in heads, the only option to avoid any reduction in the A5 reinforcement area is to volumetrically examine the segment attachment welds to verify full penetration. UG-101(a)(1)(a) Proof Test Rules The current Proof Testing rules place no time limit on the applicability of the proof test results and associated Code-mandated documentation. When the original proof test was performed, it was witnessed by the Authorized Inspector, and assuming he found the test acceptable, he would sign the Manufacturer’s Proof Test Report. The current proof testing rules allow duplicate proof tested vessel construction to be repeatedly manufactured based on the original Proof Test Report, even if Code changes were made that may invalidate the original proof test. The change to UG-101(a)(1) in the 2009 Addenda addresses this void in the rules by requiring that production vessels or vessel parts that utilize the results of a proof test shall comply with the applicable construction rules of the current edition and applicable addenda of this Division. Guidance is provided in UG-101(a)(1) and associated subparagraphs for evaluating the permissibility of reusing an original Proof Test Report that was based on a previous edition of this Division. In this case, all permissible deviations from the original proof-tested vessel or vessel part must be covered in a Supplement to the original Proof Test Report that will be made available to the Inspector prior to the start of construction.

45°

One example to demonstrate the need for these rules is the case of establishing the MAWP of tubesheets. Mandatory rules for the design of tubesheets in Part UHX were not published until the 2003 Addenda. Prior to 2003, Manufacturers would invoke U-2(g) to design and establish the pressure/temperature rating for their tubesheets, and one option

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they could have used is a proof test per UG-101. But such a proof test could not be used today since mandatory design rules now exist for tubesheets in Part UHX. The bottom line is that Manufacturers should review Code revisions on an annual basis to determine if any of these changes affect past proof tests. If the review indicates that a change does affect a past proof test, then the Manufacturer may need to update the proof test result, or in some cases conduct a new proof test. As part of this action, revisions were made to Paragraphs 10-13(b)(3) and 10-15(d) adding Proof Test Reports to the list of documents that must be stored and made available to the Authorized Inspector. Also Reference Notes 39 and 40 were added to Line 18 of Form U-1, and an entry for Proof Test was added to Line 9 on Form U-1A. In summary, vessel Manufacturers should plan on reviewing all Proof Test Reports against current code rules to determine that these proof tests are still valid for use today. They can document their findings on a Supplement to the original Proof Test Report. It can be expected that the Authorized Inspector will look for evidence of this review and confirmation from the Manufacturer (Supplement to Proof Test Report) that any proof test used to establish the MAWP for a vessel or part meets all current Code requirements. UW-16(f)(3)(a) Exemption from Reinforcement Calculations for Small Fittings Paragraph UW-16(f)(3)(a) provides rules for attaching standard fittings produced to either an ASME reference standard or a Manufacturer’s Standard with single fillet welds. This revision in the 2009 Addenda clarifies that reinforcement calculations are not required if the vessel does not experience rapid fluctuations in pressure and the opening meets the spacing limitations given in UG-36(c)(3)(c) and with single fillet welds(d). Manufacturers need to carefully check these spacing limitations when looking to exempt their small openings from reinforcement, as the spacing requirements apply not only to the distance between two small openings exempt from reinforcement, but also one small opening adjacent to a larger opening that does require reinforcement. In many cases if the small opening is within the limits of reinforcement of a larger opening, then reinforcement calculations would be required for both openings. If reinforcement calculations are required for the small fitting attached with a single fillet weld, then no credit for reinforcement from the area in the neck of the fitting can be taken. P-No. Assignment for Creep Strength Enhanced Ferrous Alloys With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. A CSEF alloy is a family of ferritic steels whose creep strength is enhanced by the creation of a precise condition of microstructure, specifically martensite or bainite, which is stabilized during tempering by controlled precipitation of temper-resistant carbides, carbo-nitrides, or other stable phases. In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys. All the materials

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presently assigned to P-No. 5B Group 2, are now assigned to P-No. 15E, Group No. 1. Manufacturers who currently have PQR's qualified with P-No. 5b, Group 2 will need to update their documentation to reflect the new P-No. assignment.. Part UHX Tubesheet Calculations The alternative rules for calculating tubesheet shear stress published in Case 2499 were incorporated into Part UHX. These rules permit the use of a more representative equivalent diameter to calculate shear stress, effectively reducing its magnitude. Additional revisions to Part UHX in the 2009 Addenda include updating the iteration instructions to return to Step 1 in all cases, and clarify the value of "m" for the Kelvin functions as dependent on "Xa" instead of "x". Also several equations in Part UHX were revised to correct the mistake in the use of the term which accounts for the effect of the Poisson's ratio of the shell twice. Heat exchanger Manufacturers should note that there were extensive revisions to Part UHX in the 2009 and that all tubesheet designs to earlier versions of the code would need to be recalculated with these updated rules. Part UIG – Pressure Vessels Constructed of Impregnated Graphite This new Part UIG represents 10 years of work to codify rules used in the construction of pressure equipment made from impregnated graphite material. Impregnated graphite material has been in industrial use for the past 60 years, primarily in the construction of chemical processing equipment where exceptional corrosion resistance and high thermal conductivity is particularly advantageous. Another excellent feature of this material is that it is very stable and long-lasting, and vessels constructed of this material typically remain in service for 20 to 30 years. Major elements of chemical process equipment are manufactured from impervious graphite, including tubes for heat exchangers, tubesheets, headers, heads and nozzles. The rules in Part UIG represent best practice within the industry that presently produces impervious graphite components, and by publishing them within Section VIII, Division 1, it is now possible to construct vessels fabricated from this material with code stamping, thereby directly allowing them to be placed in service in jurisdictions that mandate Section VIII, Division 1 as their Pressure Vessel Law. Several manufacturers of impregnated graphite equipment from both North America and Europe participated in developing these rules. Many of the rules are based on existing requirements published in European standards. Paragraph UIG-2 establishes the equipment and service limitations when constructing pressure vessels from impregnated graphite material. Manufacturers who intend to construct impregnated graphite pressure vessels under their "U" stamp will need to have their "U" Code Symbol Stamp scope revised to include construction with impregnated graphite (see Appendix DD, Note 2, # 9) Also note that companies that supply material for impregnated graphite pressure vessels (raw material, impregnation agent) do not need to be a Certificate Holder, but must supply their material with a Certified Material Qualification Form (Form CMQ). Due to the uniqueness of impregnated graphite material insofar as establishing design properties, several mandatory appendices are also published containing standard test methods for establishing the strength of the material. The appendices associated with Part UIG are:

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Mandatory Appendix 36 - Standard Test Method for Determining the Flexural Strength of Certified Materials Using Three-Point Loading

Mandatory Appendix 37 - Standard Test Method for Determining the Tensile Strength of Certified Impregnated Graphite Materials

Mandatory Appendix 38 - Standard Test Method for Compressive Strength of Impregnated Graphite

Mandatory Appendix 39 - Testing the Coefficient of Permeability of Impregnated Graphite

Mandatory Appendix 40 - Thermal Expansion Test Method for Graphite and Impregnated Graphite

Nonmandatory Appendix MM - Alternative Marketing and Stamping of Graphite Pressure Vessels

Section VIII, Division 2 The 2007 Edition of Section VIII, Division 2 represented a clean sheet rewrite of the standard. As with any new standard, there is always a "shakedown" period, whereby extensive editorial corrections are made. This is the case in the 2009 addenda of VIII-2, where close to one third of the pages making up the standard contain one or more revisions. Below is a summary of some of the more significant revisions to VIII-2 from the 2009 Addenda. Annex 2A & 2B- International Register of Professional Engineers In the current Code, two options are available for certifying the User's Design Specification and Manufacturer’s Design Report; (1) certification may be carried out by a Registered Professional Engineer who is registered in one or more states of the United States of America or the provinces of Canada; (2) an Engineer experienced in pressure vessel design and who has received the authority to perform engineering work at the location where he performs the work. This second option was revised to also require that not only shall the Engineer identify the location where he will perform work but also the name of the licensing or registering authority under which he has received the authority to perform the work. A third option has been added under this action, whereby engineers who are registered with the International Register of Professional Engineers (IRPE) of the Engineers Mobility Forum would be allowed to perform engineering work in support of certification of the User's Design Specification. Background information on the Engineers Mobility Forum can be found at: www.washingtonaccord.org/EMF/. Part 3, 3.4.6 Mandatory UT of SAW Welds in 2 ¼ Cr-1Mo-V API members have recently reported reheat cracking in 2 ¼ Cr-1Mo-V SAW welds in thick wall reactors. The small transverse cracks typically occurred after the first 600°C (1100°F) heat treatment cycle. It is only seen with the submerged arc welding (SAW) process. While the industry performs root cause analysis of this cracking, Section VIII

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http://www.washingtonaccord.org/EMF/



has added paragraphs 3.4.6 and 7.5.5.1 which require mandatory ultrasonic examination in accordance with 7.5.5 of all SAW welds in 2 1/4Cr-1Mo-V vessels. Annex 3F, Correction to Fatigue Variables and Constants The variable for the equivalent structural stress range parameter was not consistent between Annex 3.F and Part 5. Equation 3.F.7 was incorrect as shown due to an incorrect units conversion variable. The variable for the elastically calculated structural bending stress range found in Equations 5.62, 5.63, and 5.64 was not consistent with the variable shown in the nomenclature. Manufacturers should take note of these corrections to the fatigue calculations. Part 4.3, Stresses in: Cone-to-Cylinder Knuckles The 2007 Edition VIII-2 contained an updated set of rules for designing conical transitions with knuckles. These rules were recently reviewed and some errors were identified. This action corrects these errors and introduces several new variables, including betaf1, betaf2, betak1 and betak2 which are the angle used in the conical transition calculation when a flare or knuckle is present. THESE ARE SIGNIFICANT REVISIONS AND SHOULD BE CAREFULLY REVIEWED BY VIII-2 MANUFACTURERS. Part 4.18, Tubesheet Design Rules Made Consistent with VIII-1 In theory the design rules for tubesheets in VIII-2 should be identical to VIII-1 with the exception of formatting. However while VIII-2 was in the last stages of approval in 2007, the tubesheet rules in VIII-1 were revised such that the two books got out of sync. A large number of revisions have been made to Part 4.18 to bring the tubesheet design rules and VIII-2 in line with the rules in Part UHX of VIII-1. Manufacturers of heat exchangers should take note of these extensive revisions to the tubesheet design rules in Part 4.18 of VIII-2. Annulment of Code Case 2575 Case 2575 was originally published to allow VIII-2 Manufacturers to continue to use the 2004 Edition/2006 Addenda of VIII-2 for an 18 month transition period following the publication of the new 2007 Edition of VIII-2. This 18 month transition period ended on June 30, 2009 with the annulment of case 2575. Effective July 1, 2009 Manufacturers who take orders to construct VIII-2 vessels with stamping must use the latest edition/addenda of VIII-2. Section VIII, Division 3 Structural Stress Method for Fatigue Analysis of Welded Joints The Structural Stress method for fatigue analysis of welded joints has been added to Division 3. This method was included in the 2007 Edition of Division 2 and is also applicable to Division 3 vessels. With the change some of the old welded steel fatigue curves have been deleted as this new method makes them obsolete.

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Use of Elastic-Plastic Analysis Clarified When the elastic-plastic analysis may be used and when it is required to be used has been clarified. Apparently there was some vagueness in the previous wording that caused some confusion for users. The revisions clarifies that elastic-plastic analysis is required for Y = 1.25 and permits linear elastic analysis for Y < 1.25. Section IX Redesignating S-Numbers as P-Numbers This revision reassigned all the existing S-Number materials in Table QW/QB-422 and Nonmandatory Appendix D as P-Number materials for welding and brazing procedure qualification purposes and deletes all references to S-Numbers from appropriate Part QW and Part QB paragraphs of Section IX. P-Numbers are assigned to ASME materials to reduce the number of welding and brazing procedure qualifications required of Certificate Holders. A number of years ago the issue of reducing the number of qualification tests required for welding/brazing non-ASME materials used in the B31 Code for Pressure Piping and selected BPVC Code Cases was raised. Rather than anoint those materials with P-Numbers, the decision was made to assign a new designation “S-Numbers” to these materials. Since 1989, BPV Committee IX has been assigning S-Numbers to mostly ASTM materials the B31 Code and BPVC Code Cases. Since the criteria for both P-Numbers and S-Numbers are based on chemical composition, mechanical properties, weldability and brazeability, BPV Committee IX questioned the need for separating ASME and non-ASME materials into P- and S-Numbers. The assignment of a material as a P-Number (rather than an S-Number) rests solely on whether or not the base material has design allowable stress values in Section II Part D or B31. The reality is that whether or not a base material has design allowable stresses does not alter the welding characteristics of that material. With this in mind, it was decided to delete the S-Numbers and classify all weldable materials identified for use in pressure retaining or component support construction, regardless of material specification, with P-Numbers. Section IX solicited and received endorsement from BPV Committees I, III, IV, VIII and B31 regarding the replacement of S-Numbers with P-Numbers. As for Code Case N-71, BPV Committee III has decided that this document would continue the concept of S-Numbers for material supports as a stand alone Case. P-No. Assignments for CSEF Alloys With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of

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these alloys; causing serious safety concerns. A Creep Strength Enhanced Ferritic (CSEF) alloy is a family of ferritic steels whose creep strength is enhanced by the creation of a precise condition of microstructure, specifically martensite or bainite, which is stabilized during tempering by controlled precipitation of temper-resistant carbides, carbo-nitrides, or other stable phases. In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, BPV Committee IX proposed the development of P-No. 15, plus a letter designation, for these CSEF alloys. The new proposed alpha-numeric scheme is as follows: • 15A - Open for future alloys • 15B - Open for future alloys • 15C - 2¼ Cr (up to 3%Cr) • 15D - Open for future alloys • 15E - 9% Cr • 15F - 12% Cr. NOTE: In the A09 addenda there are T91 (9Cr-1Mo-V) CSEF materials that were missed when P-Numbers were reassigned to P-No. 15E Group 1, such that these materials are still listed under P-No. 5B Group 2. P-No. 5B Group 2 (9Cr-1Mo-V) materials in QW/QB-422 should be listed under P-No.15E Group 1 grouping. Qualification on P-No.15E (9Cr-1Mo-V) Base Metals The change to QW-424 satisfies a recommendation made by the TG on P-Numbers to BPV Committees I, III, VIII and B31.1 to create specific rules in Section IX to address old qualifications with P-No. 5B Group 2 vs. Group 1. This change will allow PQRs made with assigned P-No. 15E (9Cr-1Mo-V) base metals to continue to qualify weld procedures for P-No. 5B (9Cr-1Mo) base metals in addition to weld procedures for P-No. 15E base metals. A-Numbers Table QW-442 Revisions were made to the A-Numbers table to lower the upper range amount of chromium under A-No.4 from 6% to 4% and the lower range amount under A-No.5 from 6% to 4%.This change is to correct the A-Number for 5% Cr -½%Mo filler metals used in 5%Cr - ½%Mo P-No.5B Group1 base metal welding applications. Presently, 5%Cr - ½%Mo filler metals in this application falls under A-No.4 along with 2¼%Cr - ½%Mo filler metals used in P-No. 5A Group1 base metal applications. The correct A-Number should be A-No.5 so as to be consistent with the filler metal/base metal combinations of the other P-No. 5B base metals Use of Flux Coated Filler Wires for GTAW QW-404.23 was revised to add the words "flux-coated solid or metal cored". QW-404.23 did not address the use of flux coated wire for GTAW procedure or performance

E-12



qualification, only flux cored, bare (solid), metal cored, or powder. Flux coated wires are being produced by taking a solid bare wire that has been produced to an AWS/SFA Specification with a AWS Classification (e.g. ER308) and applying a flux coating. This flux coating is not addressed by the SFA filler metal specification, so the addition of the coating results in the material also becoming an unlisted filler material under QW-404.4, which is an essential variable. Based on industry experience with flux-cored GTAW filler metals and similar experience with flux-coated GTAW filler metals, a change in product form to flux-coated filler metals should be considered an essential variable for both procedure and performance qualification. Section XI Owner’s Responsibility for Repair / Replacement Activity Report IWA-6000 has been revised to address Owner’s responsibilities for contracted Repair/Repalcement Organizations by providing a report acceptable to the Owner documenting the repair/replacement activities. Data Report Form RRA, added in the new Nonmandatory Appendix T, can be used for this purpose. Revised Flaw Acceptance Standards IWB-3514 has been revised for the Flaw Acceptance Standards for Class 1 ferrtic and austenitic piping. In addition, Flaw Acceptance Standards have been added for Class 2 austenitic piping in IWC -3514. Requirements for Additional Flaw Examinations IWB-2420 and IWC-2420 have been revised to require additional examinations when new flaws or significant changes in existing flaw characteristics that result in necessary corrective actions. Examination Requirements for Inaccessible Areas IWL-1220 has been revised to require the performance of an evaluation to determine examination requirements for inaccessible areas when suspect conditions are identified in accessible areas. Section XII Modal Appendix 1, Article 1-1.4(c)(3) The revision is for Dynamic Load Condition "C" [70% vertical load increase] to allow for a 20% increase in the allowable compressive and tensile stress when analyzing longitudinal bending for US DOT cargo tanks. The affected cargo tank categories are: 406, 407 and 412. This stress limit is consistent with the requirements in Section VIII, Division 1 UG-23(d).

E-13



E-14

New Modal Appendix 4 for Ton Tanks This new Modal Appendix added specific requirements to Section XII for Ton Tanks that are intended to transport compressed gases. It carries over all the requirements of the applicable US DOT regulations, 49 CFR 179.300. A companion Mandatory Appendix XIV providing the requirements for forge-welding the heads to the shells of the Category 106A tanks has been added together with this addition, showing the acceptability of the Category 106A tanks, particularly the acceptability of exempting the SA-285 Grade A material of construction from impact testing. Appendix XIII This new Mandatory Appendix provides the user with two different methods for determining equivalent thickness, based on the Competent Authority's specified minimum thickness. This Appendix supports Modal Appendix 1. The new formula facilitates the determination of equivalent minimum thickness for penetration resistance of materials other than steel. Revised Code Case 2413 to Limit to 2004 Ed. 2006 Addenda Code Case 2413 had several references to ASME Section VIII, Div. 2, 2004 Edition 2006 Addenda and cannot readily be used in conjunction with the 2007 Edition. Code Case 2413-1 is limited to the 2004 Edition 2006 Addenda and earlier.

Synopsis of the 2009 Addenda to the ASME BPV CodeHSB Code Services

Thursday, October 22, 2009 Page 1

Foreword Revision The adoption and updating process for non-ASTM (CSA, EN, GB, JIS) specifications is the same as for ASTM specifications, therefore the Foreword was revised to include non-ASTM specifications.

Fig. PG-58.3, Preamble, PG-68.3

Revision With the advent of complex heat recovery cycles, the Section I requirements for BoilerExternal Piping [BEP] have been misinterpreted. Figure PG-58.3.1 depicts a classical boiler [economizer – evaporator – superheater - reheater]. There were no figures to clarify BEP for Section I defined alternative configurations of economizers and superheaters.This revision fills the above gap by bringing modifications to the Preamble to include isolable economizer, isolable superheater and defining certain fired pressure vessels. Modification and renumbering of Fig. PG-58.3.1 to PG-58.3.1(a) and the addition of new Figs. PG-58.3.1 (b) and PG-58.3.1 (c) show the Code Jurisdictional Limits for Piping for isolable economizers and reheaters and nonintegral separately fired superheaters.

Fig. PG-58.3.2 Revision Paragraph PG-58.3 referenced figure depicting Code jurisdiction limits for piping for forced-flow steam generators, Fig.PG-58.3.2, did not represent current arrangements of boiler parts and piping for these steam generators. A new figure, Fig. PG-58.3.3, representing an example of a more current arrangement was added to supplement the existing figure. Paragraph PG-58.3 was revised to include the reference to the new figure and the title of existing Fig. PG-.58.3.2 was revised to be consistent with the title of new Fig. PG-58.3.3.

PG-5.6 Revision This is a Section IX initiated change to provide a P-15X numerical family for the creep-strength enhanced ferritic steels (CSEF). In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys.

PG-6.1 Revision This item is to clarify that the supply pressure of the feedwater to the boiler is 3% greater than the highest setting of any pressure relief valve on the boiler proper. This will make the pressure relief valves on the boiler drum the governing setting to determine the feedwater pressure.

PG-9.1.2, PG-9.2 Revision Specifications SB-444, SB-514, SB-704, SB-705 were deleted from PG-9.1.2, and SB-514 from PG-9.2, as they are not permitted for Section I use by Table 1B of Section II, Part D.

PG-9.2 Revision SA/JIS G4303, stainless steel bar material, was added to PG-9.2.

PG-16.1 Revision The second paragraph of the Preamble contains rules to be applied when design criteria are not given in Section I. Unfortunately many Code users are not aware of these rules in the Preamble, so they have been reproduced in paragraph PG-16.1. These rules are essentially identical to U-2(g) of VIII-1.

Code Book: I

Part:

Subpart/Table: Foreword

Paragraph Type Subject

Subpart/Table: Part PG




PG-27.2.1.1 & Table PWT-10

Revision During deliberation of the new weld strength reduction factors, Subgroup Design questioned the value of the table. Table PWT-10 merely represents some specific applications of the rules provided in PG-27.2.1 and it was decided to delete it along with the associated references.

PG-32, Fig. PG-32 Revision Components such as headers with a definite pattern of the holes can be designed using the ligament rules given in PG-52 and PG-53, but the designer must also verifythat the maximum hole in this pattern does not exceed the maximum diameter specified in Fig. PG-32. Unfortunately many Code users found Fig. PG-32 to not be "user friendly", so the Committee deleted Fig. PG-32 and now requires the direct calculation of the maximum diameter using the equation: dmax = 2.75[Dt(1-K)]^1/3.

PG-32.2.2 Revision PG-32.2.2 was revised to refer to PG-18 instead of PG-100.

PG-35.3 Revision PG-35.3 previously directed the designer to design a flat head as a bolted flange when the opening size exceeded one-half of the head diameter. Section I does not contain rules for bolted flanges other than referring to Section VIII, Division 1 in footnote 13 of PG-31.3.2. This revision makes the words in PG-35.3 more general permitting other methods per PG-16.1, such as FEA, Appendix 14 of Section VIII, Division 1, etc without solely making reference to Appendix 2 of Section VIII, Division 1.

PG-52.1 and PG-53.1 Revision Revised PG-52.1 and PG-53.1 to reference the requirements of PG-32.1.2 to indicate its applicability to openings which form ligaments.

PG-58.3.8 Revision The first paragraph of PG-58.3.8 was revised to specifically address "single" high-temperature water boilers. A second paragraph was added to address requirements for redundant stop valves and free blow drains in the supply and returnpiping for multiple high-temperature water boilers.

PG-67 thru PG-73, Various

Revision New rules for pilot operated pressure relief valves from Case 2446 are incorporated into Section I as part of this action. In addition, several other revisions were made in the safety valve section dealing with terminology and overall clarification of the rules.

(1) In numerous locations, the term "Safety Valves and Safety Relief Valves" was replaced with "Overpressure Protection Requirements". (2) The terms "safety valve", "safety relief valve", "safety valve and/or safety relief valve" have been changed to "pressure relief valve" in all instances.(3) The capacity rating requirement of PG-67.5 paragraph 3 was deleted as this requirement is already contained in PG-67.2.4.(4) All forms using the terminology "safety valve and/or safety relief valve" were updated. (5) Forms P-7 and P-7M were revised to add the water capacity for economizer pressure relief valves.

PG-73 Revision The action incorporated Code Case 1923-4 into Section I. Paragraphs PG-73.2.10 and PG-73.4.4 (5) were revised to include requirements of the Code Case.

PG-73.1 Revision The provisions of Code Case 2446 are incorporated and the application of use of pilot operated pressure relief valves is expanded to include waste heat boilers and general boiler services.

PG-73.3.4(c) Errata Deleted previous PG-73.3.4(c). During the incorporation of Code Case 2208 “Corrosion Resistant Coating of Pressure Relief Valves by Assemblers” the rules specified in the code case were incorrectly incorporated. The now renumbered paragraph PG-73.4.4 restores the original intent of the Code Case incorporation.,



PG-73.5 Revision Subparagraphs previously listed under PG-73.4 "Testing by Manufacturers or Assemblies" have been renumbered under PG-73.5. The alternative pneumatic testing pressure has been increased from 1.1 to 1.25 times the design pressure (PG-73.5.1(b)); and, the word "visible" with respect to leakage was removed from PG-73.5.1(g).

PG-110 Revision A reference to PG-4 was added to address units other than US-customary or SI (metric) when included on relief valve nameplates.

Various Revision The accepted editions of Codes and Standards referenced within Section I are listedin Table A-360 of Appendix A. However, several references in the body of Section I still referred to specific editions (PG-31.3.1, Footnote 20, and Appendix A-312 through A-315), which were deleted with this action. In addition, correction of several reference standards were made to say "ASME" rather than "ANSI."

PW-16.5 and Fig. PW-16.1(w-3)

Revision It has been noted that, from Fig. PW-16.1(w-3), it is difficult to determine what the 1/4" dimension applies to. It was presumed that the dimension refers to the fillet weld throat, but the dimension line does not line up exactly. ASME B31.1 permits a 3/16" minimum external fillet weld size. Relative to the groove weld depth for a 1/2" fitting (0.188"), a 1/4" fillet seemed excessive. The revision changes the external fillet weld size to "tc" which is consistent with ASME B31.1for thinner couplings and revises PW-16.5 to describe the external fillet weld requirements.

PW-39 Revision Revised PW-39.1 by adding to the list of paragraphs that exempt the need for postweld heat treatment (PWHT), and adding PW-39.8 to describe the requirements for using Capacitor Discharge Welding of thermocouples without requiring PWHT

PW-39 Table, PW-39.3, PW-40

Revision PW-39 PWHT Table for P-No.1 materials was revised to expand the current exemptions from PWHT, based on carbon equivalence, nominal thickness, and the application of preheat when required. Under General Note (a) (1), in the 2008 Addenda, PWHT was mandatory for all longitudinal butt welds regardless of thickness. The revision in the 2009 addenda now extends the exemption based on thickness up to 3/4 inch for all groove butt or combination groove and fillet welds, independent of whether it is a circumferential or longitudinal joint. Similar exemption criteria were incorporated into the rules of ASME B31.1 2004 Edition (2006 Addenda)and Section VIII, Division 2 2007 Edition. PW-40.2 was revised to complement the revisions of Table PW-39 under this action. PW-39.3 was revised to ensure Code users are correctly applying the thickness considerations when performing welded repairs of fabrication and material defects.

PW-40.3.4(b) Revision The previous reference to "SFA-5.5, "Appendix A6.1" concerning "Electrode Covering Moisture Content and Conditioning" has been corrected to "SFA-5.5 Appendix A6.12",

Table PW-39 Revision Added Note (4)(d) in Table PW-39 for P-No. 15E Group No. 1 materials advising that provisions in PG-5.6 require that the WPS used to make welds must be qualified for PWHT with an appropriate heat treatment.

Subpart/Table: Part PW


Subpart/Table: Part PFT




PFT-9.1 and PFT-9.2 Revision The diameter-based minimum thickness requirements in these paragraphs have been in the Code since the 1914 edition. When Section I was reorganized to create the current paragraph numbering scheme, the diameter-based minimum thicknesses were moved to PFT-9.1 and as such became applicable to firetube boilers only instead of all boilers in general. No technical reason could be justified why firetube boilers should have different minimum thickness requirements that any other type of boiler.

PFT-52 Revision The addition of a fusible plug requirement for hand-fired boilers eliminates a possible conflict with the National Board Inspection Code (NBIC) which requires such a device for boilers used for "demonstration, viewing or educational purposes".

PHRSG-2 Revision The definition of the HRSG in PHRSG-2 "Scope" was revised to match the definition in the "Preamble" Footnote 5 by replacing the word "that" with the word "which".

PHRSG-3.1 and PHRSG-3.4

Revision Revised paragraph PHRSG-3.1 and PHRSG-3.4 to require condensate detection and removal in superheater and reheaters and then to have this condensate discharged to a safe collection device.

Appendix III Revision This new Mandatory Appendix provides criteria for reapplication of an ASME Code symbol stamp and covers the situation where the ASME Code symbol stamping has become indistinct or that nameplate is illegible or lost, but traceability to the original certification can be established. When requested by the Owner, the reapplication of the ASME Code symbol stamp shall be performed by the original Manufacturer of theCode item or a successor organization. The reapplication shall be authorized and witnessed by an AI, and it shall be documented on a "Certificate of Conformance for Reapplication of the ASME Code Symbol Stamp" (Form III-1A). This reapplication of the ASME Code symbol is viewed only as restoring evidence of original compliance with ASME Section I requirements.

A-70 Revision An example calculation using PG-26 was added to Nonmandatory Appendix A-70. PG-26 is applied when selecting the thickness of a component but is not used in calculating "tr" for compensation calculations in accordance with PG-33. NOTE: The title immediately preceding the A-70 example is incorrect. "Examples of Computationof Allowable Loading on Structural Attachments to Tubes" pertains to Examples A-71through A-74.

A-100 Revision Nonmandatory Appendix A-100 was revised to add Group No. 1 to P-No. 5A, B, C, and to add A-100.4.12 for the new P-No. 15E Group 1material designation.

Subpart/Table: Part PHRSG


Subpart/Table: Mandatory Appendices


Subpart/Table: NonMandatory Appendices




A-351 Note 29 Revision Note 29 of the "Guide for Completing Manufacturer's Data Report. Form P-2" incorrectly referred to "PG-70". The correct reference of "PG-101" is now provided.

Appendix A, Table A-360 Revision The following revised ASME standards have been adopted: B16.1-2005, B16.3-2006,B16.4-2006, B16.9-2007, B16.11-2005, B16.15-2006, B16.20-2007, B16.24-2006, B16.25-2007, and B31.1-2007.

Appendix B Revision This new nonmandatory Appendix was introduced due to concerns with material supply and possible abuses of the "honor system" in the certification of material. This PMI practice covers the procedures and methods to ensure that the nominal chemical content of specific key elements in metallic alloys is in accordance with purchase specifications, and that such materials are properly analyzed and identified to indicate the alloy.

2063-1 Revision Revision to Code Case 2063 for Ni-22Cr-14W-2Mo-La Alloy (UNS N06230) permits use of both US Customary and Metric (SI) allowable stresses. Tables 2, 3 and 4 were removed as data are now referenced in the material specifications and Table 1B of Section II, Part D. Permissiveness for water wetted service was retained.

2179-7, 2180-5, 2192-6 and 2327-2

Revision These Cases cover the use of creep strength ferritic enhanced steels [ 9Cr and 12Cr]. The P-No. assignment for these materials was changed from P-No. 5B, Group 2 to P-No. 15E Group 1.

2199-4 Revision Case 2199 provides rules for the use of 2.25Cr-1.6W-V-Cb Material (Grade 23) in Section I applications. Table 1 of Code Case 2199-3 was revised to ensure adequate material hardenability and to modify subparagraph (b) to clarify hardness testing requirement. For Table 1, the maximum amount of N was reduced, the minimum amount of B was increased, a limit on Ni was added, a Ti requirement was added and a Ti to N ratio was added. An exemption to the Ti:N ratio was included based on hardness test results from fully hardened material. Sub-paragraph (b) was modified to clarify when in the processing order the maximum hardness limit would be invoked. Manufacturers are cautioned that these revisions to Case 2199 have safety implications insofar as material produced to earlier revisions of the Case (2199-3, 2199-2, etc.) could meet the chemistry requirements specified in the Code Case but they could not achieve the specified mechanical properties following normalizing heat treatment. A Special Notice was issued by ASME stating that Code Case 2199-4 should now be used, and the use of Code Cases 2199, 2199-1, 2199-2, 2199-3 should be discontinued immediately.

Subpart/Table: Code Cases





SA-194 Revision Obsoletes ASTM editions older than -03 for Grades 2, 2H, 4, 7 and 16, and older than -04 for Grades 2HM and 7M. Hardnesses changed.

SA-320 Revision Obsoletes ASTM editions older than -01, and to those older than -05a for Class 2. Mandates chemical requirements. Ni revised for 304 and 347, and Cb/Nb and Ta for347. Reference to SA-962 General Requirements added.

SA-325 Revision P and S limits were reduced. Materials were extended to include carbon steel, carbon boron steel, alloy steel, and alloy boron steel. Limits heads to heavy hex only. The ASTM year-dates were updated to -00 to -06, obsoleting older editions. Nomajor changes to the -07a.

SA-352 Revision No major changes.

SA-354 Revision Deleted SI units except for a couple of reference values - there is no metric version ofthe specification. No major changes to -07a.


SA-451 Revision General requirements specification reference changed from SA-530 to SA-999.


SA-564 Revision S46500 H1025 and H1050, and S46910 half and full hard added.

SA-578 Revision Reference in the title to "Plain and Clad" Steel Plate has been changed to "Rolled" Steel Plate. Revised Level A, B and C acceptance standards to now state that any area where one or more discontinuities produce a continuous total loss of back reflection accompanied by continuous indications on the same plane within 5% of plate thickness that cannot be encompassed within a circle whose diameter is 3 in. [75 mm] or 1/2 the plate thickness, whichever is greater, is unacceptable. In addition Supplementary Requirement S1 was revised with respect to scanning directions and minimum overlap as well as S6 and S7 which now refer to Specifications A263, A264, and A265 for clad quality levels. Errors in Table S8.1, hole diameter, were corrected.

SA-645 Revision The present 5% Ni grade was redesignated as Gr. A; added new 5.5% Ni Grade B.


SA-815 Revision Stub ends fabricated by welding deleted. S41008 and S32101 added. Yield strength for S32205 reduced. Reference to ASTM A 890 General Requirements added, which is not published as SA-890. Made test reports mandatory - unless the Construction Code has other provisions.

SA/EN 10028-7 Revision Two new grades added. Maximum thickness for strip increased. Chemistry revised for austenitic and duplex grades. Product analysis tolerance for S reduced.

Code Book: II

Part: A

Subpart/Table:


Part: B



SB-161 Revision Reference to SB-829 General Requirements added.

SB-163 Revision Note that the revision to Table ED-1 for other acceptable ASTM editions older than -02 deleted the note that SB-163 has different requirements from the ASTM specification for the flaring test and lot definition. Permits NDE instead of hydro.

SB-221 Revision Many new grades were added. Alloy 6105 Mn content revised.

SB-265 Revision No major changes.


SB-333 Revision Reference to SB-906 General Requirements added. Alloy N10624 added.

SB-335 Revision Alloy N10624 added. Made certification and test reports mandatory - unless the Construction Code has other provisions. Deleted product analysis tolerances and refers to ASTM B 880 instead, which is not published as SB-880.

SB-338 Revision Updated chemical analysis methods, and certification and reporting made mandatory.

SB-348 Revision Obsoleted ASTM editions older than -05e1 for Grade 3. Made test reports mandatory- unless the Construction Code has other provisions.

SB-369 Revision Obsoleted -87 through -96 ASTM editions for welded applications, since the older editions did not limit Nb/Cb for C96200. Made test reports mandatory - unless the Construction Code has other provisions. Added alloy C96400.

SB-395 Revision The specification is now a dual-unit specification. Alloy C19200 Zn revised. Added ASTM B 858 for SCC testing. Added alloys C70620 and C71520.

SB-409 Revision Reference to SB-906 General Requirements added. Alloy N08890 added.

SB-462 Revision Heat treatment specified for N08367. Made test reports mandatory - unless the Construction Code has other provisions.

SB-463 Revision Reference to SB-906 General Requirements added.

SB-464 Revision Transverse guided bend test option added as permissible substitute in lieu of the flattening test.


SB-473 Revision Made certification mandatory - unless the Construction Code has other provisions. Deleted product analysis tolerances and refers to ASTM B 880 instead, which is not published as SB-880.

SB-516 Revision Made certification and test reports mandatory - unless the Construction Code has other provisions. UNS N06025 properties changed - obsoleted ASTM editions older than -98.

SB-582 Revision Deleted product analysis tolerances and refers to ASTM B 880 instead, which is not published as SB-880.

SB-653 Addition New specification for seamless and welded zirconium fittings

SB-751 Revision Other ASTM editions limited to -03 only, obsoleting older editions. Made certification and test reports mandatory - unless the Construction Code has other provisions.

SB-862 Revision Updated chemical analysis methods, and certification and reporting made mandatory.

Subpart/Table:




SB-956 Addition SB-956 covers forge welded copper alloys tubes with integral fins made from SB-543 tubes.

SF-467 and SF-467M Addition SF-468 N05500 bolting was added to the Code in the 2008 Addenda via the incorporation of Case 1192. A Code user requested adoption of nuts produced to thesame alloy.

SFA-5.6 Revision Composition requirements for ECu, ECuAl-A2, ECuAl-B, ECuNiAl, ECuMnNiAl revised. Bend test for low elongation (<20%) alloys (ECuAl-B, ECuNiAl, ECuMnNiAl) eliminated. Specification revised to incorporate dual (US and SI) units.

SFA-5.8 Errata The chemistry for this filler metal was shifted over one column to the left.

A-380 Addition Added a precautionary note regarding hydrogen environment embrittlement of austenitic stainless steels at low temperatures when exposed to hydrogen charging conditions, especially with strain-induced martensite from cold spinning.

P-No. for Grade 91 Revision Provides a P-15X numerical family for the creep-strength enhanced ferritic steels. This will require editorial revisions to welding documents.

SA-517 Gr J Revision ASTM Specification A 517/A 517M-06 removed Grade J; This edition was adopted in the A08

SB-956 C Addition Adds SB-956 alloy C70600 WO61 and WC55 tempers and alloy C71500 WO61 temper up to 600F for VIII-1. Added SB-543 alloy C71500 WO61 temper to Tables U and Y-1. Fixed an incorrect entry in size break for C70600 SB-543 WO61 temper in Tables U and Y-1.

SA-268 TP430Ti, UNS S43036

Revision Added the subject material for VIII-1 use up to 800°F (427°C).

SA-1010 UNS S41003 Addition Incorporates and annuls Code Case 2358. Includes Grades 40 and 50.

Part: C

Subpart/Table:


Part: D

Subpart/Table: Appendices


Subpart/Table: All Tables


Subpart/Table: Table 1A




SA/JIS G4303 Revision Allows the use of various austenitic and ferritic stainless steel grades to this bar specification for Sections I and VIII-1

Note G15 Revision Added Note G15 (Casting Quality Factors) to the casting grades where [inappropriately] missing for various copper, nickel and titanium alloys. Also editorially corrected Grade “7B” to “C-7” for SB-367 R52400.

R60702 Addition Permits use of the subject material for Section III, Classes 2 & 3, and VIII-1. Also extends use of all other product forms of this alloy to Section III, Classes 2 & 3.

SA-508 Gr 22 Revision Addition of Section III applicability for SA-508 Grade 22 up to 700°FF\ (371°C) in Section II Part D (US Customary & Metric) Table 2A. The stress line is already published in Section II Part D Table 1A.

SA-372 Grades L and M Addition These materials already have allowable stress values in Table 1A.

Table TCD Revision Published Intent Interpretation IID-07-01 and corresponding Code changes clarifyingthe difference between Groups A and B.

Subpart/Table: Table 1B


Subpart/Table: Table 2A


Subpart/Table: Table Y-1


Subpart/Table: Subpart 2




NCA-1140(a)(2)(a), (b) &(c)

Revision Under the new USA regulatory rules a Design Certification is approved for 15 years to a specific Code edition and addenda under this new licensing by NRC, and the Code Edition cannot be changed without NRC approval. Later Codes, as endorsed in 10 CFR 50.55a, must be considered by combined license (COL) commitment. The current rules of NCA-1140 require the construction Code edition to be no earlier than 3 years prior to the application or the latest endorsed by the regulator. This new change is made to accommodate the new licensing changes

NCA-3661 Revision NCA-3681 was revised to incorporate Note (5) into the text on NCA-3681 as sub-paragraph (q).

Code Book: III

Part: NCA

Subpart/Table:




Appendix II, Para II-2430and Para II-2460

Revision Revised Appendix II, Para II-2430 and Para II-2460 to clarify the text.

Table I-9.1 Revision Revised Section III, Div, 1, Appendices, Table I-9.1, Fig. I-9.2.1, Fig. I-9.2.1M; added Fig I-9.2, deleted Fig. I-9.2.2, Fig. I-9.2.2M, Table I-9.2.2, Fig. I-9.2.3

XIII-1123 Revision Unify definitions “Terms Used in Stress Analysis” from NB-3000, NE-3000, NF-3000,NG-3000, NH-3000, App.XIII-3000, and WB-3000. The definitions of Primary Stress, Secondary Stress, and Thermal Stress were editorially revised for consistency across all Section III Subsections

F-1337 and F-1345 Revision Appendix F did not address fillet weld stress limits for supports. This change now provides the limits for fillet welds for supports, under Level D Loading, to be 1.7 times that of Design Loading

Foreword to all Section IIISubsections

Revision Revise Foreword in all books to reference Acceptable Non-ASTM Editions in additionto the existing references to Acceptable ASTM Editions in Section II, Parts A and B.

NB-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

NB-2552(b)(1) Revision Revised NB-2552(b) to agree with Section V, Article 5, T-571.2(a). The revision changes the reference for the procedure for ultrasonic examination from SA-388 to Article 5 of Section V. Section V, Article 5, T-571.2(a) requires that forgings and bars shall be examined in accordance with SA-388/SA-388M or SA-745/SA-745M, as applicable, except as amended by the requirements elsewhere in Article 5.

Various Errata This change is to correct errors by errata

Various Paragraphs Revision Subsection NB was editorially revised in various locations to correct and update references as listed in Table NCA-7100-1.

Code Book: III-1

Part: Appendices



Subpart/Table: Nonmandatory Appendices


Part: NB



Subpart/Table: Article NB-2000




NB-3213 Revision Unify definitions relating to stress analysis or design by analysis from NB-3000, NE-3000, NF-3000, NG-3000, NH-3000, App.XIII-3000, and WB-3000. The definitions of "Primary Stress", "Secondary Stress", "Peak Stress", "Local Primary Membrane Stress", "Gross Structural Discontinuity" and "Local Structural Discontinuity" were editorially revised for consistency across all Section III Subsections

NB-3213.8 Revision Revised NF-3000 to consolidate the six (6) previously existing Stress Limit Factor tables. Tables NF-3522(b)-1 and NF-3622(b)-1 became Table NF-3221.2-1; Tables NF-3523(b)-1 and NF-3623(b)-1 became Table NF-3312.1(b)-1; Tables NF-3552(b)-1 and NF-3652(b)-1 became Table NF-3251.2-1.

NB-3222 Revision Incorporated editorial revisions to NB-3222, NE-3222, NG-3222, T-1324 in Appendix T of Subsection NH, Appendix XIV, and Div 3. after revising Figs. I-9.1 and I-9.1M, andTable I-9.1 in Appendix I to Section III Div. 1 to extend the design fatigue curve to 10^11 cycles.

NB-3600 Errata Errata to correct previously approved changes in Section III NB-3600 Piping Design rules

NB-3653.1 and NB-3653.6

Revision The change clarifies the definition of Sm for use in Equation 10,12, and 13 in the nomenclature of NB-3653.1 and NB-3653.6. The temperature at which to take Sm isnow specified.

Table NB-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.

NC-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration sources other than US NIST

Various Paragraphs Revision Subsection NC was editorially revised in various locations to correct and update references as listed in Table NCA-7100-1.





Part: NC

Subpart/Table: Article NC-2000




Fig. NC-3643.3(c)(1)-1 Revision Revise Section III, Fig. NC-3643.3(c)(1)-1 and Fig. ND-3643.3(c)(1)-1 to delete 1.07 factor in required reinforcement area equation.

NC-3600 Errata Errata to correct previously approved changes in Section III NC-3600 Piping Design rules

NC-3652 and NC-3653.3 (e)

Revision NC-3653.3(e) was added to define the section modulus (Z) for components other than intersections. NC-3652 was revised to provide reference to NC-3653.3(e)

NC-3655 Revision Revised NC-3655 to clarify the text.

NC-3655 Errata Makes various corrections by errata through text

Table NC-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.

ND-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

Various Paragraphs Revision Subsection ND was editorially revised in various locations to correct and update references as listed in Table NCA-7100-1.

Fig. ND-3643.3(c)(1)-1 Revision This revision is to delete the 1.07 factor from the equation for the required reinforcement area.

ND-3600 Errata Errata to correct previously approved changes in Section III ND-3600 Piping Design rules

ND-3652 and ND-3653.3 (e)

Revision ND-3653.3(e) was added to define the section modulus (Z) for components other than intersections. ND-3652 was revised to provide reference to ND-3653.3(e).

ND-3655 Errata Makes various corrections by errata through text





Part: ND

Subpart/Table: Article ND-2000






Table ND-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.

NE-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST

Various Paragraphs Revision Subsection NE was editorially revised in various locations to correct and update references as listed in Table NCA-7100-1.

NE-3213.8 Revision Revised NF-3000 to consolidate the six (6) previously existing Stress Limit Factor tables. Tables NF-3522(b)-1 and NF-3622(b)-1 became Table NF-3221.2-1; Tables NF-3523(b)-1 and NF-3623(b)-1 became Table NF-3312.1(b)-1; Tables NF-3552(b)-1 and NF-3652(b)-1 became Table NF-3251.2-1.

NE-3222 Revision Incorporated editorial revisions after revising Figs. I-9.1 and I-9.1M, and Table I-9.1 inAppendix I to Section III Div. 1 to extend the design fatigue curve to 10^11 cycles.

Table NE-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.



Part: NE

Subpart/Table: Article NE-2000






Part: NF



NF-1000 Revision A review of NF-1000 revealed that some editorial improvements would help to clarify the article. Specifically adding a reference to NCA-9000 for definitions in footnote 1, listing bolts as a means of attaching supports to building structure, deleting “workingstress” as a description of linear analysis, adding subsection references for weld jurisdiction, improving figures for clarity, and relocating attachments to their own paragraph

NF-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST

Various Paragraphs Revision Subsection NF was editorially revised in various locations to correct and update references as listed in Table NCA-7100-1.

NF-3000 Revision Revised NF-3000 to consolidate the six (6) previously existing Stress Limit Factor tables. Tables NF-3522(b)-1 and NF-3622(b)-1 became Table NF-3221.2-1; Tables NF-3523(b)-1 and NF-3623(b)-1 became Table NF-3312.1(b)-1; Tables NF-3552(b)-1 and NF-3652(b)-1 became Table NF-3251.2-1.

NF-3121 Revision Unify definitions of terms relating to stress analysis or design by analysis from NB-3000, NE-3000, NF-3000, NG-3000, NH-3000, App.XIII-3000, and WB-3000. Thedefinitions of "Primary Stress", "Secondary Stress", "Peak Stress", "Thermal Stress" and "Gross Structural Discontinuity" were editorially revised for consistency across all Section III Subsections.

NF-3251.1 Revision Editorial changes to correct the equations in paragraph NF-3251.1. It editorially corrects subscripts in equations (1) and (2) in paragraph NF-3251.1.

NF-4121.1 Revision Removes references to ANI, Inspector, and Inspection in various locations within Subsection NF. The involvement of an Authorized Nuclear Inspector for supports is no longer a requirement since the NPT Certificate was replaced with an NS Certificate beginning with the 1999 addenda of ASME Section III. The NS Certificate only requires an annual audit by the ANI Supervisor instead of the continuous ANI involvement required for welded supports.

Subpart/Table: Article NF-1000










Table NF-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.

NG-2360(b) Revision Revise NG-2360(b) to allow supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

Various Errata This change is to correct errors by errata

NG-3200 Errata Errata to correct previously approved changes in Section III NG-3200 Design rules

NG-3213 Revision Unify definitions relating to stress analysis or design by analysis from NB-3000, NE-3000, NF-3000, NG-3000, NH-3000, App.XIII-3000, and WB-3000. The definitions of "Primary Stress", "Secondary Stress", "Peak Stress", "Gross Structural Discontinuity" and "Local Structural Discontinuity" were editorially revised for consistency across all Section III Subsections

NG-3213.8 Revision Revised NF-3000 to consolidate the six (6) previously existing Stress Limit Factor tables. Tables NF-3522(b)-1 and NF-3622(b)-1 became Table NF-3221.2-1; Tables NF-3523(b)-1 and NF-3623(b)-1 became Table NF-3312.1(b)-1; Tables NF-3552(b)-1 and NF-3652(b)-1 became Table NF-3251.2-1.

NG-3351 Errata Makes various corrections by errata through text

Table NG-4622.1-1 Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. For this reason Section IX elected to change the P-No. assignment for these materials from P-No. 5B Group 2 to P-No. 15E Group 1.

Part: NG

Subpart/Table: Article NG-2000






Part: NH



Various Revision This change incorporates a number of editorial changes throughout the entire Subsection NH. The changes include updating Code terminology, clarifying Subsection NH rules, making appropriate changes to reflect the recent addition of NCA-7000, deleting a reference to a non-existent Appendix, etc.

NH-3213 Revision Unify definitions relating to stress analysis or design by analysis from NB-3000, NE-3000, NF-3000, NG-3000, NH-3000, App.XIII-3000, and WB-3000. The definitions of "Primary Stress", "Secondary Stress", "Local Primary Membrane Stress", "Peak Stress", "Gross Structural Discontinuity", "Local Structural Discontinuity" and "Thermal Stress" were editorially revised for consistency across all Section III Subsections

Subpart/Table: Article NH-2000


Subpart/Table: Article NH-3000




CC-2528(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

Various Revision Correct by errata various paragraphs in BPV III, Div 2

Table NCA-7100-3 Revision The change updates the references in Table NCA-7100-3; Standards and Specifications as referenced in Division 2.

Code Book: III-2

Part: CC

Subpart/Table: CC-2000


Subpart/Table: CC-7000




WA-9200 Revision The NUPACK subgroup is currently developing a new Code Subsection in Division 3to address internal support structures to be used within radioactive material transportation and storage containments. This definition is one of the first steps

WB-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

WB-3213.8 Revision This revision unify definitions “Terms Used in Stress Analysis” from NB-3000, NE-3000, NF-3000, NG-3000, NH-3000, App.XIII-3000, and WB-3000. The definitions of "Primary Stress", Secondary Stress", and "Thermal Stress" were editorially revised for consistency across all Section III Subsections

WC-2110 Errata Makes several editorial corrections in Subsection WC, including corrections of paragraph references, metric values, and editorial changes to text.

WC-2360(b) Revision This change allows the supply of Standard Impact Test Specimen Material for Charpy V-Notch test machine calibration from sources other than US NIST.

WC-3213 Errata Makes various corrections by errata through text

Code Book: III-3

Part: WA

Subpart/Table: WA-9000


Part: WB

Subpart/Table: WB-2000


Subpart/Table: WB-3000


Part: WC

Subpart/Table: WC-2000


Subpart/Table: WC-3000





Figure HG-320 Revision Fig. HG-320 which provided a graphical method for determining when an opening is inherently reinforced, and therefore does not require reinforcement calculations, wasremoved. The Figure limited the maximum permissible diameter of openings to 8 inches (200 mm) with no technical justification. The equation provided in HG-320.3(d) is easier to use and gives more accurate results. Section I deleted Fig. PG-32 which deals with the same subject.

HG-101 Revision HG-101.1 was revised to clarify that hot water heating boilers and hot water supply boilers may be constructed to the rules of Section IV when operating at pressures not exceeding 160 psi (1100 kPa) and at temperatures not exceeding 250°F (120°C).

HG-360.3(b) Revision This revision makes the rules for projection of water tubes beyond a tubesheet consistent with Section I. When the ends of tubes are flared, they shall extend beyond the tubesheet a distance not less than 1/4" (6 mm) or more than 1/2 in. (13mm). The technical reasoning for these limits is to make sure the flare has enough material to contribute to the anchoring of the tube yet not so much that there is danger of splitting the tube. For tubes that are not flared, there is no technical reason to limit projection.

HG-515.2(f) Revision The word "defects" was replaced for clarification with the term "imperfections".

HG-530.1 Revision This action permits the application of the Code Symbol to boilers and water heaters by etching when there is insufficient space to provide a hard stamp or fit a nameplateusing standard sized characters. Many of the newer design coil water heaters and boilers would use this application.

HG-530.2(b)(3) Revision (1) Previous reference to HG-400.1(e) was replaced with HG-400.1(d); (2) Previous reference to HG-400.2(d) was replaced with HG-400.2(e).

Various Errata The following errors were corrected: (1) HG-326.4(a) - Definition of "E[sub 1]" value was changed to include the value of "1"; (2) Figures HG-703.1(a), HG-703.1(b) and HG-703.2 were revised for clarity.

Tables HF-300.2 and HF-300.2M

Errata The following error was corrected: The designation of the alloy EN AC-43000 under material spec SB/EN 1706 was corrected. It was missing one zero (0) and the hyphen (-) between "AC" and "43000".

Code Book: IV

Part:



Subpart/Table: Part HG


Subpart/Table: Part HF




Tables HF-301.1 and HF-301.2

Revision Diameter-based minimum thickness requirements similar to Table HF-301.1 and Table HF-301.2 have been in the Code since the 1914 edition. Based on the successful experience of 57 years in Section VIII and 43 years for boilers other than firetube in Section I, the diameter-based minimum thickness requirements of Table HF-301.1 and Table HF-301.2 were deleted.

HC-311.1(b)(2)(a) Revision The previous reference to "t" (head thickness) was replaced with "T" (flange thickness).

HC-325 Revision Previous metric (SI) equivalent for "1 inch (25 mm)" washout plug minimum size waschanged to "NPS 1 (DN 25)"..

HA-303(b) Revision HA-303(b) was revised by changing the thickness requirement of fillets and transition sections between main pressure containment walls from "one (1) times the thickness of the thinner sections being joined" to "one-half (1/2) the thickness of the thinner sections being joined". This change has been a proven design practice based on a burst test of seven (7) times design pressure and is analogous to the existing requirements in Section VIII, Division1 UCI-37(a).

HA-406 Revision (1) Previous metric (SI) equivalent for hydrostatic test pressures in HA-406.1 of 30 psi (207 kPa) and 60 psi (414 kPa) were changed to (200 kPa) and (400 kPa), respectively; (2) Previous metric (SI) equivalent in HA-406.2 of 10 psi (69 kPa) was changed to (70 kPa).

Various Revision Previous references in HA-201(b)(2)(g), HA-502.12.2(c), HA-503 and HA-504(b) to nonexistent paragraph HA-410 were revised to refer to HA-406 "Hydrostatic Test"'.

HLW-101 Revision HLW-101 was revised to eliminate paragraph HLW-101.2. The revision continues to require safety devices per HLW-800 on equipment which is otherwise exempt from the rules of HLW based on input and volume; because jurisdictional authorities find this requirement useful in enforcement of local/state rules.

HLW-200, Table HLW-301

Revision Table HLW-301 was revised to permit the use of austenitic stainless steel for water heaters lined in accordance with HLW-200. Although all the conditions necessary forchloride induced intergranular stress corrosion cracking can be encountered on the water-side of an HLW item, the linings (inert barrier coatings) which protect carbon steel materials from corrosion in these environments are suitable for isolating stainless steel from aqueous chlorides and preventing this form of corrosion.

HLW-600.2(b)(7) Revision The word "indications" was replaced for clarification with the term "imperfections" and the language was made more consistent with HG-515.2(f) to provide evidence of examination of "all materials before and during fabrication" .

Subpart/Table: Part HC


Subpart/Table: Part HA


Subpart/Table: Part HLW




HLW-602.3 Revision This action permits the application of the Code Symbol to boilers and water heaters by etching when there is insufficient space to provide a hard stamp or fit a nameplateusing standard sized characters.. Many of the newer design coil water heaters and boilers would use this application.

Nonmandatory Appendix I

Revision Latest edition of ASTM D 570-98 (Reaffirmed 2005) "Specifications for Test Method for Water Absorption of Plastics" was adopted.

2382-4 Revision A new requirement has been added under letter (c) to allow for an alternative methodto the corner and fillet weld requirements of HC-320. Items (c) through (j) are relabeled accordingly.

2571-1 Revision Code Case 2571 has been revised to clearly state that the use of SA-240 grades 304L and 316L, in thicknesses up to 1/4 in., is applicable up to 160 psi.

2604 Addition New Code Case 2604 allows pneumatic testing in lieu of hydrostatic testing under HA-406. The maximum allowable working pressure of the casting cannot exceed 60 psi. The pneumatic test pressure shall be at least 2.5 times the MAWP to be stamped on the individual boiler section. In no case shall the pneumatic test pressure exceed 2.5 MAWP by more than 10 psi. The increase in pneumatic test pressure shall be in increments as described in the Code Case. The pneumatic test facility must be certified as adequate as described in the Code Case. The assembled boiler must still be subjected to the 1.5 MAWP hydrostatic test pressure of HA-406.1.

2613 Addition New Code Case 2613 permits the use of baked phenolic linings to satisfy the requirements of HLW-200. The linings shall be of an analysis intended for use in potable hot water service, and the minimum thickness shall be 0.004 in. (0.1 mm). The manufacturer shall inspect the lining to verify proper cure and minimum thickness to verify that it is free of discontinuities. Documentation of the basis of the temperature / time used and records of the inspection shall be available to the Inspector.

2614 Addition New Code Case 2614 permits the use of polyamide polymer linings applied as an electrostatic powder to satisfy the requirements of HLW-200. The use of polyamide polymer linings is limited to electric water heaters with immersion type elements, storage tanks, and those surfaces of fired water heaters that are not directly heated by products of combustion.

2615 Addition New Code Case 2615 permits sheet or plate material less than 1/8 in. (3 mm) to be used in HLW water heater and storage tank construction if: (a) the material is not less than 3/32 in. (2.5 mm), (b) the material is listed in Table HLW-300 or Table HLW-301, (c) the material is used only for a cylindrical shell, no portion of which is heating surface, (d) welding procedure and performance qualification is performed in accordance with Section IX and the additional requirements of Part HLW.

Subpart/Table: Appendices






Foreword Revision Added Reference to "Guidelines for Acceptable Non-ASTM Editions" in Section II, Parts A and B.. "ASTM" was deleted when reference is made to the two Guideline tables within the Foreword.

Article 17 - Fig. T-1762 Revision Flaw type references were corrected. The entries "0.188 degree (3.75 mm) 10%" were replaced with "3/16 in. (5 mm)". The word "diameter" under "Flaw Type" was deleted.

Article 2 - Appendix IX Revision A new Mandatory Appendix IX was added for the Digital Radiographic (DR) method. In this method, the radiation detector is in motion during exposure, but it does not require that either the source or the object be in motion. Also, in this method, a digitalimage is acquired directly by the radiation detector, there is no intermediate step such as in scanning a radiographic film for digital archiving or scanning a phosphor plate. This technique enables the digital radiograph to be immediately available to the examiner for evaluation

Article 2 - Appendix V Revision The term "image processing" was added to Article 2, Mandatory Appendix V.-230(a)

Article 2 - Appendix VIII Revision Revisions in VIII-210, VIII-277.1, VIII-277.2,VIII-277.3, VIII-282, VIII-283 (including sub paragraphs) and VIII-288 serve to clarify ambiguous language and to allow the image brightness to be "judged" in a manner similar to judging of density on a resulting film radiograph. IQI Sensitivity, image brightness and negative and positiveimage formats are explained. The last sentence of VIII-210 SCOPE was deleted as itpertained to an analog image that is to be digitally acquired, displayed and stored , thus Appendix III had no applicability to Appendix VIII.

Article 4 - Appendix III-431.2

Revision Mandatory Appendix III-431.2 was revised to delete "color levels" of images for evaluation purposes for the Time of Flight Diffraction (TOFD) UT technique. Color images were reviewed by the committee and it was determined that depending on the color scheme selected much of the phase change information was lost in the image which could lead to evaluation problems. Since T-150 allows for qualification of special techniques, this does not prevent qualifying a color scheme.

Article 4 - Appendix IV-410

Revision ASTM E 2491-06 is adopted as SE-2491 (ASTM E2491-06). Article 4, Mandatory Appendix IV, IV-410 was revised to reference SE-2491 in new Footnote 5.

Article 4 - Appendix VI Revision Article 4, Mandatory Appendix VI was added to bring the E-Scan and S-Scan phased array linear scanning technique requirements of Code Cases 2599 and 2600 into the Code.

Article 5 - Appendix III Revision Article 5, Mandatory Appendix III was revised to add definitions for four (4) UT scanning techniques, "Scan Plan", and "Examination Coverage" in III-540(b). Paragraphs III-540(a) and III-540(b) were also revised to include that Code terms listed therein are used in conjunction with this Article or other Referencing Code, Article, or Appendix.

Code Book: V

Part:



Subpart/Table: Subsection A




Article 5 - Appendix III-520(d)

Errata Reference in Mandatory Appendix III, III-520(d) to "III-530(b)" was corrected to "III-540(b)"

Figure T-434.2.1 Revision The previous words "Cladding if (present)" directly beneath the Figure have been corrected to read "Cladding (if present)".

Figures T-434.2.1 and T-434.3

Revision Figure T-434.2.1 and Figure T-434.3 did not clearly address that the depth of the notch(es), when cladding is present, must be increased by the thickness of the weld overlay applied. Both the figures and footnotes have been revised to clearly state the requirements by indicating that the "cladding thickness (CT)" must be added..

T-190 Revision T-190 indicates that the Code User is responsible for Records/Documentation. Thisrevision is intended to clarify that documentation is prepared in accordance with the requirements of the referencing Code Section and Section V, and that documentation is maintained in accordance with the referencing Code Section.

T-190 Revision T-150(a) previously added a new personnel demonstration requirement for establishing the proficiency of examination personnel. This demonstration applies when referenced by another Code Section, primarily for surface examination techniques employed by examiners who do not require certification under an employer's written practice. This follow-up action provides guidance for documentingthe personnel demonstrations. In addition, documentation requirements for procedure demonstrations addressed in T-150 (a) and (b) had not been previously addressed, but are also incorporated by this action. NDE Procedure qualification by demonstration is not affected by this action, as it is controlled by Section V Article 14.

T-434.1.2 and T-534 Revision Section IX initiated P-Number Assignments for Creep Strength Enhanced Cr-Mo Alloys which resulted in revisions to paragraphs T-434.1.2 and T-534.

T-434.4.1 Errata The previous entry "overaly" has been corrected to read "overlay".

T-463.1.4 Revision Added Alternative Angle Beam Calibration for vessels 1/2 inch (13 mm) thick or less and a diameter less than or equal to 20 in. (500 mm) to T-463.1.4. For piping in Article 4, surface notches on the ID and OD surfaces have been used for calibration for the past several years. Because they provide the same calibration reflector in both the axial and circumferential direction, it is felt that the calibration will be more consistent if they are used for thin wall small diameter vessels. Previous T-463.1.4 was renumbered as T-463.1.5.

T-675.2(b) Revision For water-washable and post-emulsifiable penetrants, it is important for the surface to dry, as any water will interfere with the developer solvent and the distribution of the suspended developer particles. The surface must be dry before applying a nonaqueous developer. Because a solvent can be flammable, only drying of the developer by normal evaporation is allowed. For solvent removable penetrants, the penetrant is removed by dry wipes and solvent dampened cloths or towels. The surface may be either dry or lightly damp and the solvent will not interfere but actuallyaid development. For this reason the paragraph was revised to allow developer used in conjunction with solvent-removable penetrant to be applied as soon as practical after the excess penetrant is removed.

T-1610 Revision Deleted "equipment" in the scope of Article 16, T-1610, as rules encompass aspectsother than "equipment". Generic information concerning "equipment" is still found in T-1630.

Various Revision Requirements for performance demonstrations and their associated documentationbelong in the referencing Code, not in Section V. This action removes any Section V imposed requirements associated with performance demonstrations by deletion of paragraphs T-693, T-794, Article 7 Mandatory Appendix I-792, Article 8 Mandatory Appendices II-890, III-892, IV-892, V-892, and VI-892, T-992, T-1594 and T-1791.



Article 23 - SA-578/SA-578M

Revision Reference in the title to "Plain and Clad" Steel Plate has been changed to "Rolled" Steel Plate. Revised Level A, B and C acceptance standards to now state that any area where one or more discontinuities produce a continuous total loss of back reflection accompanied by continuous indications on the same plane within 5% of plate thickness that cannot be encompassed within a circle whose diameter is 3 in. [75 mm] or 1/2 the plate thickness, whichever is greater, is unacceptable. In addition Supplementary Requirement S1 was revised with respect to scanning directions and minimum overlap as well as S6 and S7 which now refer to Specifications A263, A264, and A265 for clad quality levels. Errors in Table S8.1, hole diameter, were corrected.

Article 23 - SA-609/SA-609M

Revision Adopted ASTM A 609/A 609M-91 (2007), "Standard Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof", as SA-609/SA-609. This replaces ASTM A 609/A 609M-91 (R2002). No significant changes were noted.

Article 24 - SD-516 Revision Adopted ASTM D 516-07, "Standard Test Method for Sulfate Ion in Water", as SD-516. This revision replaces ASTM D 516-02. No significant changes were incorporated in this revision.

Article 29 - SE-650 Revision Adopt ASTM E 650-97 (R2007), "Standard Guide for Mounting Piezoelectric Acoustic Emission Sensors", as SE-650. Previously adopted edition was E 650-97 (R2002). No significant changes were incorporated.

2602-1 Revision Revised and added text to Code Case 2602 Section 5.0 to clarify what is to be addressed during evaluation of printed images such as area of interest, radiographic identification, location markers and IQIs.

Subpart/Table: Subsection B






Foreword Revision This revision to the Foreword appropriately recognizes that today ASME adopts the use of non-ASTM material for Code construction, and that a table titled "Guidelines for Acceptable Non-ASTM Editions" has been added to Section II, Parts A and B.

U-1(b), UG-4 Revision These revisions address the addition of Part UIG to Section VIII, permitting the use ofimpregnated graphite material for the construction of pressure vessels and vessel parts. Note that allowable design stresses are not published in Section II, Part D, butinstead given in Part UIG. See entry under Part UIG for a complete description of thisnew part.

U-1(c)(2)(h) Errata In the second line, the number "3.2" was corrected to "3-2", which is the correct paragraph reference in Appendix 3.

U-1(k), U-2(a)(5) Revision The provisions of paragraph U-1(k) were moved to new paragraph U-2(a)(5) since U-2(a) addresses user's responsibility, which is more appropriate when NDE is specified as a contractual requirement as opposed to a Code requirement.

Numerous Paragraphs Revision This action removes the abbreviation "ANSI" in the following paragraphs where it is incorrectly used to describe a referenced standard:Part UG in UG-11(a)(1), Footnote 5, Footnote 7, UG-11(c)(1), UG-11(c)(2), UG-43(e), UG-44(d), UG-44(g), UG-45(b)(4), Footnote 25. Appendix L in Fig. L-9-1, L-9.2.2 Footnote 5, L-9.5.1(a)

UG-14(b) Revision Paragraph UG-14(b) provides rules addressing the use of rolled or forged bar to fabricate hollow cylindrical shaped parts within certain size limits. A comparison of this paragraph against the original Code Case that addressed the subject of a rod and bar material revealed that UG-14(b) established stricter requirements by limitingthe bar to "rolled or forged". This restriction was removed from this paragraph thereby permitting hollow cylindrically shaped parts and heads or caps to be machined from rod or bar, with no restrictions on the material manufacturing methodfor making the rod or bar.

Code Book: VIII-1

Part:



Subpart/Table: Introduction


Subpart/Table: Part UG




UG-16(b)(2) Revision This intent interpretation and corresponding Code revision clarify that tubes and pipethat will be encased in a shell, casing or ductwork when in operation, need not satisfy the minimum thickness requirements given in UG-16(a), and that it is not the vessel Manufacturer's responsibility to provide the protective shell, casing or duct. The protective shell, casing or ductwork can be installed by the vessel Manufacturer, or by someone downstream once equipment is installed for operation. When the outer protective element is not provided by the Manufacturer as part of the vessel, theManufacturer shall note this on the Manufacturer's Data Report, and the owner shall be responsible to assure that the required enclosures are installed prior to operation.

UG-20(a), UG-21 Revision A reference back to U-2(a) is placed in paragraphs UG-20(a) and UG-21 as a reminder that it is the User's responsibility to define the design temperature and design pressure, and not the vessel Manufacturer.

UG-27(a) Revision UG-27(a) was revised to allow the use of the alternative thick shell equation given in Appendix 1, 1-2 in lieu of the thickness equation given in UG-27(c)(1) for cylindrical shells subject to circumferential stress. This is a departure from the previous rules which only permitted the use of the thick shell equations in Appendix 1 when certain thickness or pressure limits were exceeded. The use of this new thick shell equationin Appendix 1 will result in up to a 5% reduction in wall thickness for heavy walled vessels. This equation in Appendix 1 is the same as used in VIII-2.

UG-33(b) Errata UG-33(b) - The variable "Ds" was listed twice in the Nomenclature, and the second entry was deleted.Fig. UW-13.3 - The spelling of "greater" was corrected in Note (1).UW-46 - The reference to "UW-15(d)" was corrected to "UG-37(g)".UHT-34 - The reference to sketch (l) corrected to sketch (j) in the second line, and the reference to sketch (n) was corrected to sketch (l) in the 3rd line.

UG-34(a) Errata The reference to "U-2(c)" in Footnote 20 was corrected to "U-2(g)".

UG-37(h), UG-37(i) Revision The current Code neither prohibits nor defines requirements for the use of split reinforcing pads on nozzles. These new rules for split reinforcing pads were added to UG-37(h) to address the possibility that failure of the weld connecting the pad segments could result in loss of reinforcement of the opening. To address this concern, the amount of reinforcement area one can take credit for the pad is reducedby 25% unless (1) the weld attaching the segments is a butt weld that is radiographed or ultrasonically examined to confirm full penetration, or (2) for openings in cylinders, the weld attaching the segments is oriented at least 45 degrees from the longitudinal axis of the cylinder. Note that for openings in heads, the only option to avoid any reduction in the A5 reinforcement area is to volumetricallyexamine the segment attachment welds to verify full penetration. The original UG-37(h) paragraph has now been designated UG-37(i).

UG-43(d) Revision When drilling and tapping a hole for a studded connection, UG-43(d) currently requires that the drilled hole shall not penetrate within one-fourth of the wall thickness from the inside surface of the vessel after the deducting corrosion allowance. The term "wall thickness" corresponds to the nominal thickness. An inquirer requested that this be changed to " minimum required thickness". The Committee agreed with this suggestion, and the paragraph was revised as follows: "The distance from the inside surface of the vessel to the bottom of a drilled hole to be tapped shall not be less than the corrosion allowance plus one-fourth of the minimum required wall thickness. Weld metal may be added to the inside surface ofthe vessel to maintain this distance (see UW-42)." This revision will permit a deeper tapped hole than previously allowed in the Code.



UG-90(b)(16), UG-101(a)(1), 10-15, Forms U-1, U-1A

Revision The current Proof Testing rules put no time limit on the applicability of the proof test results and associated Code-mandated documentation. When the original proof testwas performed, it was witnessed by the Authorized Inspector, and assuming he found the test acceptable, he would sign the Manufacturer’s Proof Test Report. The current proof testing rules allow duplicate proof tested vessel construction to be repeatedly manufactured based on the original Proof Test Report, even if Code changes were made that may invalidate the original proof test. The change to UG-101(a)(1) will address this void in the rules by requiring that production vessels or vessel parts that utilize the results of a proof test shall comply with the applicable construction rules of the current edition and applicable addenda of this Division. Guidance is provided in UG-101(a)(1) and associated subparagraphs for evaluating the permissibility of reusing an original Proof Test Report that was based on a previous edition of this Division. In this case, all permissible deviations from the original proof-tested vessel or vessel part must be covered in a Supplement to the original Proof Test Report that will be made available to the Inspector prior to the start of construction .One example to demonstrate the need for these rules is the case of establishing theMAWP of tubesheets. Mandatory rules for the design of tubesheets in Part UHX were not published until the 2003 Addenda. Prior to 2003, Manufacturers would invoke U-2(g) to design and establish the pressure/temperature rating for their tubesheets, and one option they could have used is a proof test per UG-101. But such a proof test could not be used today since mandatory design rules now exist for tubesheets in Part UHX. The bottom line is that Manufacturers should review Code revisions on an annual basis to determine if any of these changes affect past proof tests. If the review indicates that a change does affect a past proof test, then the Manufacture may need to update the proof test result, or in some cases conduct a new proof test.As part of this action, a revisions were made to Paragraphs 10-13(b)(3) and 10-15(d)adding Proof Test Reports to the list of documents that must be stored and made available to the Authorized Inspector. Also Reference Notes 39 and 40 were added toLine 18. of Form U-1, and an entry for Proof test was added to Line 9.on Form U-1A.

UG-115(b) Revision UG-115(b) was revised to make it consistent with U-4 concerning units of construction. In the current Code, U.S. Customary, SI, or any local customary units may be used in the construction of the pressure vessel. However as stated in U-4(b) all entries on the Manufacturer's Data Report and data for Code required nameplate marking shall be in units that are consistent with the fabrication drawings.

UG-117(f), Table U-3 Revision This revision clarifies that it is the Authorized Inspector Supervisor who must conductthe intermediate review/audit of the "UM" Certificate Holder (following first and second year of the certificate), and not the Authorized Inspector. Also reference to UG-117(f) was added to the Note (3) of Table U-3.

UG-120(a)(4), Form U-3, Table W-3

Revision The National Board began accepting U-3 Forms for registration and filing in 2005. This revision adds the provision for a Manufacturer to register his "UM" vessel and file the U-3 data report with the National Board in lieu of maintaining the documents for the minimum period of five years. Form U-3 was revised adding an entry for the National Board Number to Line 4.and corresponding Instruction Note 12.



UG-125(a), UG-127, UG-129-132, UG-134-137, Appendix M, Form UD-1, Form UV-1, Appendix W

Revision This action incorporates the provisions of Code Cases 2091, 2487, and 2395. The incorporation of Cases 2091 and 2487 introduce buckling pin and breaking pin reliefdevices into VIII-1. The incorporation of Case 2395 permits rupture disk devices with no outlet connections to be capacity certified. The revisions related to this action are too numerous to list in detail. Below is a summary of the revisions by paragraph; however if a Manufacturers needs to view the actual marked up pages for these revisions, they should send a request to [email protected](a) – Changed reference from UG-137 to UG-138UG-127 – General revisionUG-129 – General revisionUG-130 – Changed "Code Symbol" to "Code Symbol Stamp"UG-131 – General revisionUG-132 – General revisionUG-134(e) – Changed tolerance format to agree with new UG-134(f)UG-134(f) – Added pin device set pressure toleranceUG-134(g) – Renumbered UG-134(f)UG-135(b)(2) Footnote 62 – Changed “various rupture disk” devices to “nonreclosingpressure relief” devicesUG-136(a)(6) – Changed “screwed’ to “threaded”UG-136(c)(3) – Changed "Code Symbol" to "Code Symbol Stamp"UG-136(c)(3)(d) – Changed "Code Symbol" to "Code Symbol Stamp"UG-136(c)(4)(a)(1) – Changed "Code Symbol" to "Code Symbol Stamp"UG-137(c)(3) – Changed "Code Symbol" to "Code Symbol Stamp"UG-138 – New sectionAppendix M-4 – Changed several references from “safety” devices/valves to the generic “pressure relief” devices.Appendix M-5.2 Definition of valve failure controls – changed “of” the purpose to “for” the purposeAppendix M-7 – General revisionAppendix M-9 – General revisionAppendix M-12 – General revisionForm UD-1 – General revisionForm UV-1 – General revisionAppendix W, Table W-3.2 – General Revision

UG-125(d) Revision Paragraph UG-125(d) addresses accessibility of a pressure relief device for purposes of inspection, replacement and repair and service. Testing was added as another consideration when locating and installing PRD's in a pressure vessel. The addition of "testing" brings this requirement in line with a similar requirement in VIII-2.

UG-127, Footnote 47 Errata In the fourth line the word "designated" was inserted between "his agent".

UG-131(e)(2) Errata UG-131(e)(2) - In the SI Units calculation of the correction factor for theoretical flow, WT, the denominator "33.2P -1001" was corrected to "33.2P - 1061";

UG-136(a)(3) Revision Paragraph UG-136(a)(3) states: "Each pressure relief valve on air, water over 140°F (60°C), or steam service .... ". The phrase "water over 140°F" has been a source of confusion, as it is not clear whether the 140°F limit should be applied to the water in the vessel, just below the pressure relief valve, or the water that is discharged through the valve during a relief event. Due to the potential for developing deposits inside relief valves that are continuously exposed to water over 140°F, it is more appropriate to require the lifting lever when the valve is normally exposed to water over 140°F, so the sentence was revised to read: " Each pressure relief valve on air, water at the valve inlet that exceeds 140°F (60°C), excluding overpressure or relief events, or steam service...".



Fig. UW-13.3, UW-46 Errata Fig. UW-13.3 - The spelling of "greater" was corrected in Note (1).UW-46 - The reference to "UW-15(d)" was corrected to "UG-37(g)".

Fig. UW-16.1 sketch (bb) Revision Fig. UW-16.1 sketch (bb) provides the weld attachment detail for a small fitting attached to the vessel shell or head with a fillet groove weld. This revision changes the minimum throat dimension of the cover fillet weld from a mandatory 1/4" to tc which is the smaller of 1/4" or 0.7tmin. This change makes the fillet weld throat size consistent with the rest of the weld joint details covered in Fig. UW-16.1.

UW-2(d)(3), UW-51(a)(3) Errata UW-2(d)(3) - In the first line the word "designated" was inserted between "his agent".UW-51(a)(3) - In the first line, "T-285" was corrected to "T-274.2".

UW-11(b) Revision The opening sentence of this paragraph was revised to make it clear that aside fromUW-11(b), spot radiography is also required per UW-11(a)(5)(b).

UW-16(b), Fig. ULW-18.1

Revision This action incorporates the provisions of Code Case 2449 whereby the inside corner radius, r1, for integral nozzles was changed from "the lesser of 1/4t or 3/4 in." to " 1/4t or 1/8 in." This significantly reduces the nozzle corner radius requirements for heavy walls which under the previous rules was 3/4" (19mm), and now the radiusnever needs to be greater than 1/8 in. (3mm). Justification for this change is based on finite element analysis or several dozen configurations where it was observed that increasing the corner radius beyond 1/8 of an inch had minimal effect on the peak stress at this location. As part of this action, the definition of r3 in Fig. ULW-18.1was changed to retain the requirement that the outside corner radius specified in thefigure must be 1/4tn or 3/4 in., whichever is less.

UW-16(c)(1), UW-40(f)(5)(b)

Errata UW-16(c)(1) - Corrected reference to "UG-37(b)" to "Fig. UG-37";UW-40(f)(5)(b) - The reference to "sketch (f)" was corrected to "sketch (e)";

UW-16(f)(3)(a), UW-16(f)(3)(a)(5), UW-16(f)(3)(b)

Revision Revised UW-16(f)(3)(a) to clarify that reinforcement calculations are not required for fittings covered by the paragraph, if the vessel does not experience rapid fluctuationsin pressure and the opening meets the spacing limitations of UG-36(c)(3)(c) and (d).This revision is a follow-up to Interpretation VIII-1-04-98. Paragraph UW-16(f)(3)(a)(5) was changed to state that the openings must satisfy the spacing requirements given in UG-36(c)(3)(c) and (d) in order to be exempt from reinforcement. Paragraph UW-16(f)(3)(b) was revised to state that when reinforcement calculations are required because an opening does not satisfy the spacing requirements of UG-36(c)(3)(c), then no material in the nozzle neck shall be counted as reinforcement.

UW-21 Revision A reference to Appendix 2, Fig. 2-4 sketch 3 in UW-21(b) has been deleted, and Fig. UW-21 replaced. The net result is that the weld size requirements for socket and slip-on weld flanges are now fully contained in UW-21, as opposed to using one of the sketches from Appendix 2, Fig. 2-4. The sketches and new Figure UW-21 are taken from B31.3 code, and the most significant difference between the sketches and the sketch given in Appendix 2 is that there is no longer any maximum limit on the set-back dimension for the flange.

Subpart/Table: Part UW




UW-52(c)(2) Revision This revision to UW-52(c)(2) clarifies the spot radiography acceptance criteria for isolated indications and multiple indications that exist in a line. It is not clear in the current code if the last two sentences of this paragraph which described the 1/4" and3/4" limitations only applied to multiple indications in a line, or also to isolated indications. This revision makes it clear that the 1/4" and 3/4" limitations do apply to isolated indications.

Fig. UCS-66 Notes Errata In Note (4) for SA/EN 10028-2 P295GH the phrase "[see Note (e)(3)]" was deleted.

UCS-56(a), Table UCS-56, Table UCS-57. Appendix R, R-11

Revision With the incorporation of the new Creep-Strength Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can leadto variations in heat treatments that may significantly degrade the physical propertiesof these alloys; causing serious safety concerns. A Creep Strength Enhanced Ferritic (CSEF) alloy is a family of ferritic steels whose creep strength is enhanced bythe creation of a precise condition of microstructure, specifically martensite or bainite, which is stabilized during tempering by controlled precipitation of temper-resistant carbides, carbo-nitrides, or other stable phases. In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys. • Revised UCS-56 to change P-No. 5B Group 2 to P-No. 15E Group 1• Added P-No 15E, Gr. 1 to Table UCS-57 and removed P-No 5B Gr. 2• Added new paragraph R-11 to Appendix R describing preheat recommendations.

Table UNF-23.2, Appendix 23, 23-2

Addition This action adopts forge welded copper alloys tubes with integral fins, produced under SB-956 (C70600, C71500) for Section VIII, Division 1 applications. This integral finned tube may also be used when performing alternative external pressurecalculations as permitted in Appendix 23, 23-2.

Table UNF-23.3 Revision This action involves the incorporation of Case 2484 which permitted the use of solution annealed 58Ni-33Cr-8Mo alloy in wrought sheet, plate and strip (SB-575), rod (SB-574), welded pipe (SB-619) and tube (SB-626), wrought fittings (SB-366), seamless pipe and tube (SB-622) and forgings (SB-462,SB-564) for VIII-1 construction.

Table UNF-23.3, SF-467/M

Addition SF-468 N05500 bolting was added to VIII-1 in the 2008 Addenda via the incorporation of Case 1192. A Code user requested adoption of nuts produced to thesame alloy, and this action adds SF-467 & SF-467M N05500 to Table UNF-23.3

Table UNS-23.5, UNS R60702, R60705

Addition This action involves the incorporation of Case N-710 and the addition of zirconium alloy UNS R60702 & R60705 seamless and welded fittings for VIII-1 construction. Note that although SB-653-R60705 was added to Table UNF-23.5, there is no corresponding stress line in II-D. The material can be used under the provisions of UG-15.

Subpart/Table: Part UCS


Subpart/Table: Part UNF




Table UHA-23 Addition JIS G4303 is a standard for stainless steel bar that includes some of the types that are commonly used, such as 304L and 316L. Since the JIS standard chemistries forthe common types of stainless steels are nearly the same as those for the ASME SA types, and minimum values for mechanical properties specified by the JIS standard are close to those specified for the ASME SA types (reference SA-479), stainless steel bars produced to JIS G4303 would be suitable alternatives for current ASME SAmaterials. This action adds the following Grades to Table UHA-23:SA/JIS G4303 SUS302SA/JIS G4303 SUS304SA/JIS G4303 SUS304LSA/JIS G4303 SUS310SSA/JIS G4303 SUS316SA/JIS G4303 SUS316LSA/JIS G4303 SUS321SA/JIS G4303 SUS347SA/JIS G4303 SUS405

Table UHA-23 Addition This action involves the incorporation of Code Case 2358 for use of SA-1010 UNS S41003 material for VIII-1 applications up to 600°F (316°C).

Table UHA-23, Table UHA-32 (Note (1)

Addition This action involves incorporation of Case 2419, permitting the use of SA-268 ferritic stainless steel welded tubing, TP430 UNS S43036 for VIII-1 construction.

UHT-34 Errata UHT-34 - The reference to sketch (l) corrected to sketch (j) in the second line, and the reference to sketch (n) was corrected to sketch (l) in the 3rd line.

Table ULT-82 Revision This revision corrects the thickness range for SB-209 in metric units.

ULT-2, 5,27,28,29,99,100,115, Table ULT-23, Table ULT-82

Revision The Committee has received numerous requests from Manufacturers of ULT vessels to increase the current maximum temperature limit of 100°F (40°C) to 150°F(65°C). These vessels are typically being used in the processing and storage of LNG and ethylene in locations where the ambient air temperature can reach over 120°F (49°C). Since the maximum allowable stress given in Section II, Part D is the same at 100°F as it is at 150°F, the Committee concluded that it would be acceptable to increase the maximum permissible temperature for Part ULT construction to 150°F.

ULT-5(f), ULT-17(d) Errata ULT-5(f) - In the 3rd line, ' fo ' was corrected to ' of ' ;ULT-17(d) - In the 2nd line, reference to sketch (k) was corrected to sketch (i).

Subpart/Table: Part UHA


Subpart/Table: Part UHT


Subpart/Table: Part ULT




Part UHX Revision This revision involves cleaning up the terminology used for expansion joints in Code.The phrase "thick-walled expansion joints" was replaced with "flanged and flued or flanged only expansion joints"; the phrase "bellows-type expansion joints", "pressure vessel and heat exchanger expansion joints", or "thin-walled expansion joints" were replaced with "bellows expansion joints". Also where appropriate, the phrase "expansion bellows" has been replaced with "expansion joint". These changes were made in the following Part UHX paragraphs and Figures: Fig. UHX-3, UHX-13.3, Fig. UHX-13.1 General Note, UHX-16, UHX-17, Table UHX-17.

Table UHX-13.1 Errata Table UHX-13.1 - In the Equation for Zm, the phrase " ber'(Xa)" was corrected to " ber^'2(Xa)"Table UHX-13.2 - In the Title to Table UHX-13.2, the phrase " and, Zw, min, Zw, max " was deleted.

UHX-12.3, UHX-12.4(b),UHX-12.5.9, Fig. UHX-12.2, UHX-12.5.11, UHX-13.3, UHX-13.5.8,UHX-13.5.10(b), UHX-13.6.3, UHX-13.6.4, UHX-14.3, UHX-14.4

Revision The provisions of Code Case 2499 were incorporated into Part UHX. This case provided alternative rules for calculating tubesheet shear stress. Additional revisionsto Part UHX under this action include updating the iteration instructions to return to Step 1 in all cases, and clarify the value of "m" for the Kelvin functions as dependent on "Xa" instead of "x". Heat exchanger Manufacturers should note that there were extensive revisions to Part UHX in the 2009 and that all tubesheet designs to earlier versions of the code would need to be recalculated with these updated rules.

UHX-13, UHX-14 Revision Several equations in Part UHX were revised to correct a mistake in the use of a term which accounts for the effect of the Poisson's ratio of the shell twice. Revisions are made to the following formulas:Revise calculation of "Psubscript s'" in UHX-13.5.6 Step 6;Revise calculation of "sigma subscript s,m" in UHX-13.5.10 Step 10;Revise calculation of "sigma subscript s,m" and "sigma subscript s,m" in UHX-13.5.11 Step 11;Revise calculation of "sigma subscript c,m" in UHX-13.5.11(b);Revise reference to Step 10 to Step 11 in UHX-13.7.3(b);Revise calculation of "sigma subscript s,b" in UHX-13.8.4(g);Revise calculation of "sigma subscript s,m" and "sigma subscript s,m" in UHX-14.5.10 Step 10 .

UHX-13.5.10(a) Revision In the design of fixed tubesheets, the limit on axial membrane stress in the shell for load cases 4,5,6 and 7 was changed from "2Ss" to "SPS,s"

Subpart/Table: Part UHX


Subpart/Table: Part UIG




New Part UIG, Mandatory Appendices 36-40, Non-Mandatory Appendix MM

Revision This new Part UIG represents 10 years of work to codify rules used in the construction of pressure equipment made from impregnated graphite material. Impregnated graphite material has been in industrial use for the past 60 years, primarily in the construction of chemical processing equipment where exceptional corrosion resistance and high thermal conductivity are particularly advantageous. Another excellent feature of this material is that it is very stable and long-lasting, and vessels constructed of this material typically remain in service for 20 to 30 years. Major elements of chemical process equipment are manufactured from impervious graphite, including tubes for heat exchangers, tubesheets, headers, heads and nozzles. The rules in Part UIG represent best practice within the industry that presently produces impervious graphite components, and by publishing them within Section VIII, Division 1, it is now possible to construct vessels fabricated from this material with code stamping, thereby directly allowing them to be placed in service injurisdictions that mandate Section VIII, Division 1 as their Pressure Vessel Law. Several manufacturers of impregnated graphite equipment from both North America and Europe participated in developing these rules. Many of the rules are based on existing requirements published in European standards.Paragraph UIG-2 establishes the equipment and service limitations when constructing pressure vessels from impregnated graphite material. Manufacturers who intend to construct impregnated graphite pressure vessels under their "U" stamp will need to have their "U" Code Symbol Stamp scope revised to include construction with impregnated graphite (see Appendix DD, Note 2, # 9) Also note thatcompanies that supply material for impregnated graphite pressure vessels (raw material, impregnation agent) do not need to be a Certificate Holder, but must supplytheir material with a Certified Material Qualification Form (Form CMQ). Due to the uniqueness of impregnated graphite material insofar as establishing design properties, several mandatory appendices are also published containing standard test methods for establishing the strength of the material. The appendices associated with Part UIG are:Mandatory Appendix 36 - Standard Test Method for Determining the Flexural Strengthof Certified Materials Using Three-Point LoadingMandatory Appendix 37 - Standard Test Method for Determining the Tensile Strength of Certified Impregnated

Appendix 13, 13-17(f) Revision In the calculation of the bending stress in the semi-cylindrical section and Example 13-17(f), a shortcut is used to represent the bending stress equation " PLc/6I". A clarification statement was added to this example to point out that the term "PLc/6I" algebraically reduces to "PL/t^2".

Appendix 17, Fig. 17-2, Appendix 26, Table 26-15.2

Errata Appendix 17, Fig. 17-2 (Page 458) - This Figure was replaced with the Figure from the 2004 Edition, which properly depicts two dimpled plates instead of one as in the current Code.Appendix 26, 26-14.3.2(g) (Page 504) - The variable "B3" was removed in the calculation result presented for Kb ;Appendix 26, Table 26-15.2 (Page 505) - The value of ß1 for C2 was corrected from "1.061" to "-1.061";





Appendix 1, 1-2, 1-3 Revision The current equations given in UG-27(c) to calculate the required thickness of a cylindrical shell are "hybrid" equations which give an accurate answer for thin shells and moderately thick shells. However for thick cylinders [ t > 1/2 Ri or P > 1.25SE] the more accurate Lame equation as provided in Appendix 1 must be used. This revision replaces the Lame equation for circumferential stress in Appendix 1 with a simpler equation that provides an accurate result for all ranges of shell thickness. This equation is the same that is presently used in VIII-2 as well as A-317 of Section I. Also use of this new equation is not solely limited to thick shells, but it may be used for all sizes/thicknesses of shells (See UG-27). The existing rules for longitudinal stress and Appendix 1-2 were not revised as they are consistent with those given in VIII-2.

Appendix 1, 1-6(d), 1-6(e), Appendix 2, 2-1(c)

Revision The rules of 1-6(d) suggest that when a standard flange as covered by one of the referenced standards listed in Table U-3 is used to attach a dished head to a shell, the flange must also meet the design requirements of Appendix 2. Research carried out by Subgroup Design of Section VIII traces this requirement all the way back to the1951 Edition of API-ASME Code. However revisions to Appendix 1-6 over subsequent years combined with the fact that the pressure-temperature ratings published within referenced standards listed in Table U-3 may be used without further calculation. The revision to 1-6(d) clarifies that Appendix 2 calculations are not required when a slip-on flange conforming to one of the standards listed in TableU-3 is used and the design pressure-temperature is within the pressure-temperature rating permitted in the standard. The sentence addressing use of standard flanges in 1-6(e) has been deleted. Also dished covers has been added to 2-1(c) as another item for which flange standards listed in UG-44 may be used.

Appendix 26 Revision This revision involves cleaning up the terminology used for expansion joints in Code.The phrase "thick-walled expansion joints" was replaced with "flanged and flued or flanged only expansion joints"; the phrase "bellows-type expansion joints", "pressure vessel and heat exchanger expansion joints", or "thin-walled expansion joints" were replaced with "bellows expansion joints". Also where appropriate, the phrase "expansion bellows" has been replaced with "expansion joint". To these changes were made in the following Appendix 26 paragraphs and Figures: Title to Appendix 26, Fig. 26-1, 26-14.1.1, 26-14.2.1, 26-14.3.1.

Appendix 26, 26-2(e), 26-4(h)

Revision The design of bellows expansion joints in Appendix 26 are based on EJMA rules (Expansion Joint Manufacturers Association). The design formula are based on elastic analysis theory that will generally lead to high stresses (due to the axial displacement) for which creep will increase the strain and likely lead to significant ratcheting. For this reason the design formula are not valid in the creep regime. Further the design fatigue curves are based on tests conducted by EJMA at temperatures below the creep range. For this reason an upper temperature limit of 800°F (425°C) has been established for use of the design rules for bellows expansion joints in Appendix 26. However Manufacturers may design bellows expansion joints above 800°F if they can satisfy 26-4.1(f), which invokes U-2(g). Newparagraph 26-4.1(h) permits using operating metal temperature instead of design temperature when performing the fatigue evaluation in accordance with 26-6.6.

Appendix 2, 2-6,Appendix 26, 26-14.2.2(q)

Errata 2-6 In the 9th line, the word "valve" was corrected to "value".26-14.2.2(q) In the Equation for S2', the variable 'R' in the numerator is corrected to '1'. 26-14.2.2(r)) In the Equation for Psc, the number '2' in the denominator was deleted;26-14.2.2(r) In the Equation for Kb, the variable 'w' in the denominator was replaced with ' w - Crq' .



Appendix 30, 30-2(c)(1), 30-2(c)(2)

Revision Appendix 30 provides rules for partially drilled radial holes in cylindrical and spherical shells. The current rules require two or more partially drilled holes be spaced such that their limits of reinforcement do not overlap. However it is not uncommon for such a hole to be close to another reinforced or unreinforced opening, thus this revision adds the requirement that the spacing requirements need not be satisfied if the provisions of U-2(g) are met.

Appendix 5 Revision This revision involves cleaning up the terminology used for expansion joints in Code.The phrase "thick-walled expansion joints" was replaced with "flanged and flued or flanged only expansion joints"; the phrase "bellows-type expansion joints", "pressure vessel and heat exchanger expansion joints", or "thin-walled expansion joints" were replaced with "bellows expansion joints". Also where appropriate, the phrase "expansion bellows" has been replaced with "expansion joint", and hyphens were introduced into the phrases: " flange-and-flued" and " flanged-only. These changes were made in the following Appendix 5 paragraphs and Figures: Title to Appendix 5, 5-1(a), 5-1(e), Fig. 5-1, 5-5(f)

Appendix DD Revision With the publication of Part UIG in the 2009 Addenda allowing the construction of vessels and components fabricated from impregnated graphite material, it was necessary add impregnated graphite pressure vessels and parts to the certificate scope definitions for Section VIII, Division 1. Note that construction of impregnated graphite vessels and parts is only permitted for VIII-1, and not VIII-2 or VIII-3.

Appendix L, L-1.6 Errata In the calculations of thickness in Examples L-1.6.1, L-6.2 and L-6.3, a negative sign was inadvertently used in the numerator instead of a plus sign. These corrections affected the numerical results.

Appendix L, L-2.1.2 Revision Required thickness in this example is governed by the longitudinal tensile stress perCase (1) (b) which is 0.244 in, but the concluding statement at the end is incorrectly showing a value of 0.232 in.

Appendix L, L-7.7 Revision Example problem L-7.7 presents reinforce the calculations for a hillside nozzle. The calculation of the reinforcement area available in the nozzle, A2, was updated to more accurately reflect the nozzle orientation angle, a3 .

2179-7, 2180-5, 2192-6 and 2327-2

Revision These Cases cover the use of creep strength enhanced ferritic steels [ 9Cr and 12Cr]. The P-No. assignment for these materials was changed from P-No. 5B, Group 2 to P-No. 15E Group 1.

2385-1 and 2506 Errata Case 2385-1, Table 1 - The specification listed for Wrought fittings was corrected from " SB-566" to "SB-366";Case 2506, Paragraph (a) - The reference to "260°F" was corrected to "260°C";

2418-1 Revision Revise Code Case to: (1) Change heat treatment from a range to a minimum in paragraph (e); (2) correct thickness vs. mechanical property to conform with recent ASTM specifications.







2497-3 Revision Code Case 2497-2 provided allowable stresses to only 500 °F. This revision extends the minimum temperature to 600 °F.

2544-1 Revision This Case provides rules for out-of-tolerance heads that do not meet the rules for external pressure designed in UG-81(b). The current version of the case, 2544-1, was applicable for both Section VIII, Divisions 1 and 2. This change removes coverage for 2007 Edition of VIII-2.

2586-1 Revision External pressure design is now permitted by this revision with reference in paragraph (f) to Figure HA-5, Section II, Part D.

2590-1 Revision Case 2590 was originally approved on October 19, 2007. It permits a vessel Manufacturer to subcontract certain welding to a non-certificate holder. In the original version of the case, the welding was limited to electron beam welding of alloys of copper, nickel, and titanium. This revision to the case expands the material list to now include aluminum (P-2X) and austenitic stainless steel (P-8).

2591 Addition Case 2591 allows the use of solution annealed alloy UNS S31002 seamless pipe and tube for Section VIII, Division 1 construction. This material is suitable for heat exchanger tube and pipe in processes that manufacture nitric acid, acrylic fibers, andammonium nitrate.

2593-1 Revision RevisedCase 2593 paragraph (b)(2)(c) to delete the ending phrase "0.04 in. (1 mm) when base metal thickness > 3/8 in.". Per Section VIII, Div.1 Appendix 26-2(b), thicknesses greater than 0.2 inch (5.0 mm) are not permitted when applying this Code Case, making the subject phrase unnecessary.




1.B, 2.4.3.4, 2.G.6.2, 3.2.6.1.a, 3.2.6.2

Revision Certain mandatory definitions were revised, and in some cases relocated to the body of the normative texts. Also note that with these changes, several definitions related to materials are now different from that given in Appendix 3 of VIII-1.1.B.2.1 - Acceptance by the Inspector - Revised the opening sentence, and relocated the last sentence to 2.4.3.4.1.B.2.3 - ASME Designees - Relocated the second sentence describing certain duties of the ASME Designee to 2.G.6.2.1.B.2.4 - Certificate of Compliance - Updated the definition for certificate of compliance, deleted the last two sentences concerning signatures and maintenance of records.1.B.2.5 - Communicating Chambers - editorially revised the definition.1.B.2.9 - Material - definition revised to clarify that material is any substance or product form covered by a specification in Section II, Parts A, B, or C or any other substance or product form permitted for use by VIII-2.1.B.2.10 - Material Manufacture - definition revised.1.B.2.11 - The definition for Material Supplier was deleted.1.B.2.12 - Material Test Report - definition revised.2.4.3.4 - a portion of the definition given in 1.B.2.1 was moved to this paragraph.2.G.6.2 - The duties of the ASME Designees were Moved from 1.B.2.3 to this paragraph.3.2.6.1.a - Certificate of Compliance and Material Test Reports - These definitions were updated and a portion of 1.B.2.12 moved to this paragraph.3.2.6.2 - The Title to this paragraph was changed to: "Certificate of Compliance and Material Test Reports by Other than Materials Manufacturer".

2.3.1.3 Revision During the balloting of VIII-2, a comment was made on Paragraph 2.3.1.3 concerningthe use of computer programs for the design or analysis of components. Several Committee Members commented that the statements made in this paragraph are also addressed in the Foreword to the Code. To maintain consistency between the different Divisions of Section VIII, it was decided to delete this paragraph, and rely on the text in the Foreword for guidance on use of computer programs.

Code Book: VIII-2

Part:



Subpart/Table: Annex 1.B


Subpart/Table: Part 2




2.A.2.2 Revision In the current Code, two options are available for certifying the User's Design Specification; (1) certification may be carried out by a Registered Professional Engineer who is registered in one or more states of the United States of America or the provinces of Canada; (2) an Engineer experienced in pressure vessel design and who has received the authority to perform engineering work at the location where he performs the work. This second option was revised to also require that not only shall the Engineer identify the location where he will perform work but also the name of the licensing or registering authority under which he has received the authority to perform the work.A third option has been added under this action, whereby engineers who are registered with the International Register of Professional Engineers (IRPE) of the Engineers Mobility Forum would be allowed to perform engineering work in support of certification of the User's Design Specification. Background information on the Engineers Mobility Forum can be found at: www.washingtonaccord.org/EMF/.

2.B.2.2 Revision In the current Code, two options are available for certifying the Manufacturer's DesignReport; (1) certification may be carried out by a Registered Professional Engineer who is registered in one or more states of the United States of America or the provinces of Canada; (2) an Engineer experienced in pressure vessel design and who has received the authority to perform engineering work at the location where he performs the work. This second option was revised to also require that not only shallthe Engineer identify the location where he will perform work but also the name of the licensing or registering authority under which he has received the authority to perform the work.A third option has been added under this action, whereby engineers who are registered with the International Register of Professional Engineers (IRPE) of the Engineers Mobility Forum would be allowed to perform engineering work in support of certification of the User's Design Specification. Background information on the Engineers Mobility Forum can be found at: www.washingtonaccord.org/EMF/.

3.11.2.3.d, Table 3.F.10, Table 3.F.11

Errata 3.11.2.3.d - In the first line," Figure 3.8 limits..." corrected to: "Figure 3.7 limits...".Table 3.F.11 - On Page 3-122, the Title to Table 3.F.11 was corrected to "Table 3.F.10".Table 3.F.11, Table 3.F.11M - On Page 3-123, the Prediction Interval for the first two rows were corrected to read: " Upper 68% ".

Subpart/Table: Annex 2.A


Subpart/Table: Annex 2.B






3.11.4.1.b,3.11.4.5, 3.11.4.5.4, 3.11.4.6

Revision Several editorial and organizational changes were made to 3.11 related to "pre-use testing" of welding consumables. A summary of the changes by paragraph follows:3.11.4.1.b - Revised references to "pre-use testing" ; "3.11.4.5(d)(4)(i) through (iii)" changed to: "3.11.4.5(d)(1) through (3)"; "3.11.4.5 (d) (4) (iv) and 3.11.4.5 (d) (4) (v)" changed to "3.11.4.5 (d) (4) and 3.11.4.5 (d) (5). 3.11.4.1.b.2 - the phrase "or filler metal" was changed to "heat affected zone"3.11.4.1.b.2.iii - the phrase "Each heat or lot of filler metal" was changed to "Each heat or lot of austenitic stainless steel filler metal".3.11.4.5 - Paragraph 3.11.4.5.d was relocated to 33.11.4.5 and titled "Required Impact Testing for Austenitic Stainless Steel Welding Consumables with MDMT Colder than -104°C (-155°F)". 3.11.4.6 - Paragraphs 3.11.4.5.a thru c addressing vessel production test plates were relocated to 3.11.4.6.

3.4.4.5 Revision The temperature limit above which each heat of filler wire in flux combination used inproduction must be qualified by a weld metal stress-rupture test for 2.25Cr-1Mo-1/4Vmaterial was decreased from 470°C (875°F) to 440°C (825°F). This change was made in consideration of the increase in allowable stresses in the new VIII-2.

3.4.6, 7.5.5.1 Addition API members have recently reported reheat cracking in 2 1/4Cr-1Mo-V SAW welds in thick wall reactors. The small transverse cracks typically occurred after the first 600°C (1100°F) heat treatment cycle. It is only seen with the submerged arc welding (SAW) process. While the industry still performs root cause analysis of this cracking, Section VIII, Div. 2 has added paragraphs 3.4.6 and 7.5.5.1 which require mandatory ultrasonic examination in accordance with 7.5.5 of all SAW welds in 2 1/4Cr-1Mo-V vessels.

3.5.3.2, 3.11.3.3(a)(3), Table 3.A.2, Table 6.7, Table 6.17 & 6.18, 7.4.9.3(b)

Revision The ASTM 2005 Edition of A 645/A 546M-05 changed the designation of the 5% Ni steel to Grade A and added a new 5½% Ni steel as Grade B. The update of SA-645 in Section II, Part A, requires the change of 5Ni-¼Mo steel to SA-645 Grade A in Section II, Part D tables; in Section VIII, Divisions 1 and 2; in Section IX, and in Section XII. (SA-645 Grade B has not yet been adopted by any BPV Construction Code.)

Part 3 Errata 3.2.6.2.b - In the first line, correct "... compliance with the all supplemental" with "... compliance with all the supplemental".3.7.1 - Correct the spelling of "supplement" to "supplemental".3.10.4.4.b - In the second line, "on" to "one".Figure 3.9 - The definition " tg1 = min tb, tc" was corrected to " tg1 = min ta, tc".

Annex 3.A Errata Table 3.A.1 - For SA-765 Grade III, replace "Carbon Steel" with " 3 1/2 Ni", and list the UNS number as "K32026".Table 3.A.1 - For SA-765 Grade IV, replace "3 1/2Ni" with "Carbon Steel", and list UNS number as "K02009".

Table 3.A.1, Notes to Figs. 3.7 to 3.8M

Revision Grade P355GH has been adopted for use under SA/EN 10027-2. This material is considered a near equivalent to SA-516 Grade 70. Also the Notes to the Material Assignment Table for the Impact Test Exemption Curves were updated, assigning EN/SA 10028-2 Grade P355GH as rolled to Curve B, and if normalized to Curve D.





3.F.2.2, 3.F.3, 5.5.5.2 Revision The variable for the equivalent structural stress range parameter was not consistent between Annex 3.F and Part 5. Equation 3.F.7 was incorrect as shown due to an incorrect units conversion variable. The variable for the elastically calculated structural bending stress range found in Equations 5.62, 5.63, and 5.64 was not consistent with the variable shown in the nomenclature.(1) 3.F.2.2 Variable "delta Srange" was replaced with "delta S subscript ess,k".(2) Eq. 3.F.7 This equation was corrected, using variable "delta S subscript ees,k" and "C subscript us"(3) 3.F.3 Deleted variable "C subscript usm"; Added variable "delta S subscript ess,k"(4) 5.5.5.2.f The variable "delta sigma subscript m,k" was corrected to "delta sigma subscript b,k supersript e" in equations 5.62 5.63 and 5.64.

Table 4.1.1, Table 4.1.2, Annex 4.D

Revision Loadings produced by deflagration were added to the loads that must be consideredin the design of the vessel (Table 4.1.1), the design load combination considering deflagration (Table 4.1.2), and guidance on how to accommodate loadings produced by deflagration (Annex 4.D.).

Tables 4.1.1 and 4.1.2 Revision Several corrections were made to Tables 4.1.1 and 4.1.2:(1) In Table 4.1.1, the description of P was changed from "internal and external maximum allowable working pressure" to "internal or external specified design pressure.(2) In Table 4.1.2 Note (2) referring to the term 0.9 P. was deleted, and the remainingNotes renumbered.

4.2.5.1, Table 4.2.1, Revision A definition of spiral welded joints was added to 4.2.5.1. This joint type is assigned to Category A in Table 4.2.1.

Part 4.2 Errata 4.2.5.5.c.2 - In the last line, the reference to "Details 1, 3, and 8." was correct to "Details 1, 2 and 8."Figure 4.2.4 - In note 3., the term " c > t" was corrected to " c> ta".

Table 4.2.12 Detail 5 Revision Table 4.2.12 Detail 5 provides the weld attachment detail for a small fitting attached to the vessel shell or head with a fillet groove weld. This revision changes the minimum throat dimension of the cover fillet weld from a mandatory 1/4" to tc which is the smaller of 1/4" or 0.7tmin. This change makes the fillet weld throat size consistent with the rest of the weld joint details covered in Table 4.2.12.

Subpart/Table: Annex 3.F


Subpart/Table: Part 4.1






4.3.13, Table 4.3.7 and 4.3.8

Revision The 2007 Edition VIII-2 contained an updated set of rules for designing conical transitions with knuckles. These rules were recently reviewed and some errors wereidentified. This action corrects these errors and introduces several new variables, including betasubf1, betasubf2, betasubk1 and betasubk2 which are the angle usedin the conical transition calculation when a flare or knuckle is present. THESE ARE SIGNIFICANT REVISIONS AND SHOULD BE CAREFULLY REVIEWED BY VIII-2 MANUFACTURERS.

Part 4.3 Errata 4.3.22.4.e - In STEP 5, the word "interpretation " was corrected to "interpolation" in the second line.4.3.22.5.e - In STEP 5, the word "interpretation " was corrected to "interpolation" in the second line.4.3.13 - The variable , "mu" Poisson's ratio was added to the Nomenclature.

Part 4.3 Errata 4.3.13 - The definition of phi was editorially revised to "angle to locate a circumferential section in a spherical shell."

Part 4.4 Errata 4.4.6.1.e - Replace " L sub c" with L sub ce" in Equations 4.4.49, 4.4.51 and 4.4.52.4.4.12.2.i.2 - The references to 4.12.2.b.4 and 4.12.2.c. were corrected to 4.4.12.2.b.1and 4.4.12.2.c, respectively.

4.5.12.1 Revision In Eq. 4.5.126, "S subscript n" was corrected to "S subscript allow"

4.5.17.1 Revision Paragraph 4.5.17.1 addresses reinforcement of openings subject to compressive stress. The last sentence of this paragraph "Nozzles that satisfy the size limitations in paragraph 4.5.2 are exempt from reinforcement calculations" should not exist, since just prior to publication of the 2007 Edition of VIII-2, all size exemptions from reinforcement calculations were removed from the standard. It was an oversight that this particular requirement was published in 4.5.17.1.

4.5.17.3 Revision An error was identified in the calculation of the required area of reinforcement for cylindrical and conical vessels designed for axial compression. Equations 4.5.168, 4.5.169, and 4.5.170 were revised to correct this mistake.

Fig. 4.5.1 Revision The equation for AT was removed from Fig. 4.5.1, and only the term defined. The totalcontributed area, AT, is defined in paragraph 4.5.5.1.d for radial nozzles in cylindrical shells and in paragraph 4.5.10.1.e for radial nozzles in spherical shells or form heads.

Part 4.5 Errata 4.5.15 - In the first line, the word "heads" was inserted between "formed" and "shall".4.5.15.b - The word "shells" was replaced with "heads".4.15.18 - Remove the letter "f" from the definition for Sn.









Part 4.6 Errata 4.6.4.3.d - The reference to "Table 4.16.6" was corrected to "Table 4.16.5".4.6.4.3.e - The reference to "Table 4.16.6" was corrected to "Table 4.16.5".

Table 4.6.1 Errata The definition for variable C was corrected to: "C = min[0.33m, 0.20]" in details 3 and6.

4.7.2.2, 4.16.1.3 Revision The rules of 4.7.2.2 suggest that when a standard flange as covered by one of the referenced standards listed in Table 1-1 is used to attach a dished head to a shell, the flange must also meet the design requirements of 4.16. Research carried out by Subgroup Design of Section VIII traces this requirement all the way back to the 1951 Edition of API-ASME Code. The revision to 4.7.2.2 clarifies that 4.16 calculations arenot required when a slip-on flange conforming to one of the standards listed in Table1-1 is used and the design pressure-temperature is within the pressure-temperature rating permitted in the standard. Dished covers has been added to 4.16.1.3 as another item for which flange standards listed in UG-44 may beused.

Tables 4.12.2 thru 4.12.15, Figs. 4.12.1 thru 4.12.13, fig. 4.12.15

Revision Part 4.13 contains the design rules for noncircular vessels. The table headings "Critical Locations" and "Defined Locations" found in paragraph 4.12 were considered ambiguous and in need of further clarification. Critical locations are defined as locations of "maximum stress", and Notes were added to Figs. 4.12.1 through 4.12.13 and Fig. 4.12.15 to help identify the critical locations and defined locations.

Part 4.15 Errata 4.15.4.2 - The reference to "4.3.11" was corrected to "4.3.10".Table 4.15.1 - In Note 1. replace "16" with "12" in denominator of second term.Table 4.15.1 - The entry for r at 140° was corrected from "87.333°" to "87.833°".

Part 4.15 Errata 4.15.3.2.a - Move the number "1" to the numerator in Equation 4.15.4.













4.16.6.1(c), Tables 4.16.3 and 4.16.9, Fig. 4.16.3, Fig. 4.16.8

Revision These revisions are primarily editorial to improve the presentation of the rules, and to make them consistent with the rules in Appendix 2 of VIII-1.4.16.6.1(c) - Calculation for bo clarified;Table 4.16.3 - editorial changes to make consistent with Table 2-5.2 of VIII-1; for Facing Sketch 1d, the expression for Basic Gasket Seating Width was corrected froma "max [ ]" to "min [ ]";Table 4.16.9 - One of the stress limits for Integral Type Flange was corrected from 1.5 Sno to 2.5 Sno, and 1.5 Sng to 2.5 Sng. Fig. 4.16.3 - The construction line for the bolt hole was added to Sketch (d);Fig. 4.16.8 - In upper left sketch, the equal sign was missing in the term: "Gc = OD Contact Face".

4.18 Revision In theory the design rules for tubesheets in VIII-2 should be identical to VIII-1 with the exception of formatting. However while VIII-2 was in the last stages of approval in 2007, the tubesheet rules in VIII-1 were revised such that the two books got out of sync. A large number of revisions have been made to Part 4.18 to bring the tubesheet design rules and VIII-2 in line with the rules in Part UHX of VIII-1. Manufacturers of heat exchangers should take note of these extensive revisions to the tubesheet design rules in Part 4.18 of VIII-2. The number of revisions to 4.18 are too extensive to list here; companies can request a marked up copy of 4.18 showing the revisions by sending a request to: [email protected].

4.18.11, 4.18.12, 4.18.15.d, Fig. 4.18.1

Revision This revision involves cleaning up the terminology used for expansion joints in Code.The phrase "thick-walled expansion joints" was replaced with "flanged and flued or flanged only expansion joints"; the phrase "bellows-type expansion joints", "pressure vessel and heat exchanger expansion joints", or "thin-walled expansion joints" were replaced with "bellows expansion joints". Also where appropriate, the phrase "expansion bellows" has been replaced with "expansion joint". These changes were made in the following Part 4.18 paragraphs and Figures: 4.18.11, 4.19.12, 4.18.15, Fig. 4.18.1.

4.19., Fig. 4.19.1 Revision This revision involves cleaning up the terminology used for expansion joints in Code.The phrase "thick-walled expansion joints" was replaced with "flanged and flued or flanged only expansion joints"; the phrase "bellows-type expansion joints", "pressure vessel and heat exchanger expansion joints", or "thin-walled expansion joints" were replaced with "bellows expansion joints". Also where appropriate, the phrase "expansion bellows" has been replaced with "expansion joint".









5.13 Revision In the Nomenclature to Part 5, in the definition for Sps, a reference was added to paragraph 5.5.6. Sps is the allowable limit on the primary plus secondary stress range.

5.13, Table 5.2, Table 5.3 Revision The description of the Design Load Parameter, P of Table 5.2 was incorrectly labeled as internal and external maximum allowable working pressure in the 2007 Edition of VIII-2. The Design Load Parameter, P is actually the internal or external specified design pressure. Also the definition for P in the nomenclature was changed to: "Specified Design Pressure", to be consistent with 2.2.2.1.(d).In Table 5.3 T was inadvertently left out of the Load Case Combinations. T corresponds to thermal loads, applied displacements, etc., that result in a self-restraining load case. T was added to Design Load combination (3) and (7). The Heading for the second column of Table 5.3 was changed to "Allowable Stress",and the stress limits for the different design mode combinations changed from "S" to"Determined based on the Stress Category shown in Figure 5.1". This change also required the deletion of Notes (2) & (3), and the renumbering of Note (4) to Note (2).

5.5.3.2.d.3, Eqs. 5.35 through 5.85

Revision The calculation of the Poisson correction factor, Kv,kin Eq. 5.34 was found to be incorrect in the 2007 Edition of VIII-2. The correction involves introducing new variable np and Equation 5.35, which then results in a renumbering of all subsequent Equations in Part 5, as well as references to Equations in the paragraphs.

Table 5.10 Errata The variable labels were removed from the entries for C1 and C2' in the Table.

Table 5.9 Revision Table 5.9 contains Fatigue Screening Criteria for Method A. Under non-integral construction, the Description "All other components that do not contain flaw" was revised to read "All other components". The deleted phrase "that do not contain flaw" is misleading and has led to confusion among users with regard to what is the definition of the flaw.

Annex 5.C Revision These changes to Annex 5.C were made to harmonize the annex with API 579-1/ASME FFS-1 Annex B.4. The procedures contained in Annex 5.C did not change, only the format of its presentation.

5-F.1 Revision The experimental stress analysis rules in Annex 5.F were originally published in Appendix 6 of the previous edition of Section VIII, Division 2. Aside from miscellaneous editorial revisions to this Annex, the following changes were also made:· Added para 5.F.1.4 that requires the user's approval for the use of the Annex· Modified 5.F.3.1 to limit use of the Annex to a maximum temperature not exceeding that given on the fatigue curve of Part 3;· Limited the use of the procedure to where there are not more than 50,000 design cycles, due to concerns with accurately predicting failures in the high cycle regime.· 5.F.4 Added definitions for RsubLP and RsubSF.· Corrected the figure designation for Figures 5.F.1 and 5.F.2.

Subpart/Table: Annex 5.C


Subpart/Table: Annex 5.F




Part 6 Errata 6.1.2.3.e - In the third line, replace "or" with "or".6.2.5.1 - in the fourth line, remove " ' " after the word "otherwise".

Table 6.11A Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. A Creep Strength Enhanced Ferritic (CSEF) alloy is a family of ferritic steels whose creep strength is enhanced by the creation of a precise condition of microstructure, specifically martensite or bainite, which is stabilized during tempering by controlled precipitation of temper-resistant carbides, carbo-nitrides, or other stable phases. In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys. In Table 6.11.A, reference to P-No. 5B Group 2 was revised to P-No. 15E Group 1.

Table 6.17 Errata SA-724 - Note 1 was added to entry for Postweld Heat Treatment Temp., Holding Time, and Minimum Holding TimeSA-508 - Note 1 was corrected to Note 2 for Thickness Requiring PWHT

Table 6.2 Addition High alloy Grades 201-1, 201-2 and 204 were added to Table 6.2 which addresses Post Fabrication Strain Limits and Required Heat Treatment For High Alloy Materials.

7.3.2 Revision During the balloting of Section VIII, Division 2, a comment was made on whether a nozzle was considered an "appurtenance". The revisions to this paragraph removed the reference to appurtenances, and further clarified the rules as they pertain to checking that parts are of the prescribed shape and that they fit properly and conformto the contour of the vessel surface when attached.

Table 7.2 Revision The description of tube-to-tubesheet joints in Table 7.2 was changed from "Tube ends into tubesheet" to "Tube-to-Tubesheet Welds". Also the designation of tube-to-tubesheet weld joints as Types 7, 9 & 10 is incorrect; the correct joint details are given in Figs. 4.18.13 and 4.C.1.









9.7 Revision In the 2007 Edition, Paragraph 9.7 contains the rules for providing overpressure protection by design as an alternative to installing pressure relief devices. These rules are based on Code Case 2211. Subsequent to the publication of the 2007 Edition of VIII-2, VIII-1 incorporated the provisions of Case 2211 into paragraph UG-140. Following with the precedent that all overpressure protection rules required by VIII-2 would be referenced directly from VIII-1, paragraphs 9.7.1, 9.7.2 in 9.7.3 havebeen deleted, and a reference to UG-140 has been placed in paragraph 9.7.

9.A.8.b Revision To maintain consistency with terminology used in VIII-1, the second sentence of 9.A.8.b: "The resultant bending moments on a closed pressure relief device may cause pressure relief valve leakage, damage to rupture disks, and excessive stress in inlet piping." was changed to: "The resultant bending moments on a closed pressure relief device may cause leakage, device damage, and excessive stress in inlet piping."

2468 Addition This Case permits the use of nickel-chromium-molybdenum-colombium alloy [UNS N06625] for Section VIII, Division 2 in product form SB-443 (plate), SB-444 (pipe and tube), SB-446 (rod and bar) and SB-564 (welded construction).

2575 Revision Case 2575 was originally published to allow VIII-2 Manufacturers to continue to use the 2004 Edition/2006 Addenda of VIII-2 for an 18 month transition period following the publication of the new 2007 Edition of VIII-2. This 18 month transition period ended on June 30, 2009 with the annulment of case 2575. Effective July 1, 2009 Manufacturers who take orders to construct VIII-2 vessels with stamping must use the latest edition/addenda of VIII-2.

2611 Addition This Case adopts the use of SA/EN 10028-3, Grade P355N fine grain normalized steel plates for use in the 2004 Edition through 2006 Addenda of Section VIII, Division 2. Thickness and temperature limits are set to restrict use of this material, and the immediate need for this Case is to use this material for supports welded to intermodal transport tanks constructed to the requirements of Code Cases 2279 and 2413.








KG-311.10 Addition Paragraph (d) added to incorporate the Section VIII, Division 2 Structural Stress Method for fatigue analysis of welded joints using Article KD-3. Paragraph (d) was renumbered to (e).

KG-311.14 Revision Paragraph references changed in KG-311.14(a) and (b) due to change to KG-311.15.

KG-311.15 Revision The revision clarifies that engineers who reside outside the US or Canada and are recognized as professional engineers under their country's legal system are permitted under the rules of KG-311.15 to sign and certify a User's Design Specification.

KG-311.24 Revision The revisions to KG-324(a), KG-324(b) and KG-324.1 clarify that engineers who reside outside the US or Canada and are recognized as professional engineers under their country's legal system are permitted under the rules of KG-311.15 to signand certify a Manufacturer's Design Report.

KM-211.2(b) Revision The revision adds test locations in forgings for precipitation hardened and age hardening materials listed in Table KM-211. There was a previous change for bar forms and this change was made to keep consistency between product forms.

KM-211.3(b) Revision The revision limits the use of the "T/4" location for test specimens to only precipitation-hardening and age-hardening steels that are air-quenched after aging.

KM-400(c)(2) Revision Reference to Table U in Section II, Part D, was added.

Table KCS-1 Errata Note (10) for 2Ni-1/2Cr-1/4Mo-V, Class 3 was deleted by errata.

Table KCS-1M Errata The Maximum Temperature for SA-723, Grades 1, 2, and 3, Class 1 material revised from 450°C to 425°C.

Table KM-211 Revision The revision adds materials to the Table to be consistent with the change to paragraph KM-211.2(b).

Tables KCS-1 and KCS-1M

Revision SA-350, Grade LF2 forgings was added to Tables KCS-1 and KCS-1M thus incorporating Code Case 2589.

Tables KCS-1 and KCS-1M

Revision ASTM Specification A 517/A 517M-06 removed Grade J. Grade deleted from Tables KCS-1 and KCS-1M.

Code Book: VIII-3

Part:



Subpart/Table: Part KG


Subpart/Table: Part KM




Figures KD-1130 and KD-1131

Revision The corner radius requirements for r1 have been revised to be the smaller of 1/4 of the diameter of the opening, 1/4 of the shell wall thickness, 1/4 the nozzle wall thickness or 3/4 inch (19 mm). When Section VIII, Division 3, was originally written it was generally accepted that a generous blend radius at the intersection of a nozzle bore with the bore of a shell or head would increase the fatigue life. Recent work has shown that this is not true, so the minimum requirements have been reduced.

KD-100(c) Revision KD-100(c) was deleted to provide Subgroup High Pressure Vessels time to review the effect of the revision to KD-221 which increases the allowable stress.

KD-104 Revision Revision provides clarification that equations, text, Tables and Figures throughout VIII-3 are in the corroded condition except when there is when specific exception made.

KD-131 Revision Paragraph revised to incorporate the Section VIII, Division 2 Structural Stress Methodfor fatigue analysis of welded joints using Article KD-3.

KD-140 Revision Revision adds paragraph KD-1260 to the list of fatigue evaluation methods that are permitted only if a leak-before-burst mode of failure can be demonstrated.

KD-140 Addition Paragraph revised to incorporate the Section VIII, Division 2 Structural Stress Methodfor fatigue analysis of welded joints using Article KD-3.

KD-220 and KD-221 Revision Revisions to KD-220 and KD-221.1 through KD-221.4 incorporate the flow stress criterion instead of Nadai's general yielding through the thickness criterion for cylindrical and spherical shells. Also in the revision are limitations to when the new equations may or may not be used.

KD-230 through KD-235 Revision KD-230 completely revised (KD-230 through KD-235) with the changes to the ElasticPlastic Analyses.

KD-300 through KD-372 Revision Section VIII, Div. 3 added the Structural Stress method for fatigue analysis of welded joints to Article KD-3 of Section VIII, Div. 3. This is the method that was adopted by the new Division 2. With the addition of the method Article KD-3 has been completely revised. The equation numbering method of KD-3 was revised to be consistent with the other books in the Code. The welded steel fatigue curves (Figs. KD-320.2, KD-320.2M) have been removed since the use of Structural Stress method makes them obsolete. Other Tables have been redesignated. Tables KD-360.1, KD-360.1M, KD-370.1, and KD-370.1M have been added.

KD-500 and KD-520(c) Revision Paragraph revised to clarify that the calculations in this Article are in the new, uncorroded condition. This would be an example of a specific instance in this Division of where the equations are not in the corroded condition.

KD-620 Revision The title has been revised since the overall paragraph and its subparagraphs contain rules for threaded components besides just fasteners.

Table KD-230 Revision Table KD-230 was renumbered as KD-231.4. New Tables KD-230.1, KD-230.2 and KD-231.3 added to address the changes to the paragraphs KD-230 through KD-235

Subpart/Table: Part KD


Subpart/Table: Part KF




KF-1112(b) Revision Revision adds XM-16 (UNS No. S45500) age-hardening stainless steel to the paragraph. Prior to this revision, welding of this age-hardening stainless steel was not addressed but the materials were listed.

KT-312 Revision Revised to KT-312.1 and KT-312.2 to change the upper limit for hydrostatic test pressure when using the new flow stress criterion.

Appendix 1 Addition New nomenclature added to address new changes to KD-230.

Appendix 1 Addition New nomenclature added to address addition of Structural Stress Method for Fatigue Analysis of Welded Joints

Appendix 1 Addition Appendix 1, Nomenclature has been revised with the addition of the flow stress criterion instead of Nadai's general yielding through the thickness criterion for cylindrical and spherical shells

Appendix E, E-110 and E-120

Revision Revision adds more complete recommendations for required thicknesses and maximum principal stress for thick walled blind ends. Design equations for the required thickness and corner radius principal stresses that are based on a series of finite element stress analyses have also been added. Equation numbers in E-120, E-221 and E-222 have been renumbered.

Appendix L Revision With the inclusion of the Structural Stress method for fatigue analysis of welded joints to Article KD-3, nonmandatory Appendix L was added to provide recommendations for post-processing of the results from an elastic finite element stress analysis for comparison to the limits specified in KD-240.

Forms K-1 and K-2; Table A-100.1

Revision Forms and the Instructions for completing the forms have been revised to include professional engineers that are not an "RPE" from the US or Canada. Where the form stated "PE State", they now state "Licensing or Registration Authority".

Table D-500 Errata In the first column "Rk<0.67" and "Rk>0.67" deleted. In the second column, location of C2 and C3 corrected and "f(Rk)=30.53Rk-17.0" deleted.

2579-2 Revision Code Case 2579 paragraph 3.11 was modified to provide performance based requirements for galvanic protection of carbon fiber wrapped vessels. In addition, Form CRPV-1A was revised to provide for reporting thickness of any sacrificial layer.

Subpart/Table: Part KT










Foreword Revision Revised Foreword to reference Acceptable Non-ASTM Editions in addition to the existing references to Acceptable ASTM Editions in Section II, Parts A and B.

Introduction, QW-100.3, QW-144, QW-202.1, QW-219.1, QW-321, QW-322.1, QW-322.2, QW-403.25, QW-407, QW-407.9, QW-408.2, QW-530, QW-540, QW-483, QW-484A, QW-484B, QW-485, Appendix E

Revision The word "conditions" is often used in this Section when other terms, e.g., factors, variables, rules, standards, requirements, or parameters would be more appropriate. The revisions are being made to use terms that are most appropriate for the context of the paragraph.

Introduction, QW-200.3, QW-409.29, QW-420, QW-420.1, QW-420.2, QW/QB-422, QW-423.1, QW-424.1,QW-520(b), QW-484A, QW-484B, QW-485, & Nonmandatory Appendix D

Revision This revision reassigns all the existing S-Number materials in Table QW/QB-422 as P-Number materials for welding and brazing procedure qualification purposes and deletes all reference to S-Numbers from appropriate paragraphs of Section IX.

P-Numbers are assigned to ASME materials to reduce the number of welding and brazing procedure qualifications required of Certificate holders. A number of years ago the issue of reducing the number of qualification tests required for welding/brazing non-ASME materials used in the B31 Code for Pressure Piping and selected BPVC Code Cases was raised. Rather than anoint those materials with P-Numbers, the decision was made to assign a new designation “S-Numbers” to these materials. Since 1989 Subcommittee IX has been assigning S-Numbers to mostly ASTM materials the B31 Code and BPVC Code Cases.

Since the criteria for both P-Numbers and S-Numbers are based on chemical composition, mechanical properties, weldability and brazeability, Subcommittee IX has questioned the need for separating ASME and non-ASME materials into P- and S-Numbers. The assignment of a material as a P-Number (rather than an S-Number) rests solely on whether or not the base material has design allowable stress values in Section II Part D or B31. The reality is that whether or not a base material has design allowable stresses does not alter the welding characteristics of that material. With this basis in mind, it was decided to delete the S-Numbers and classify all weldable materials identified for use in pressure retaining or component support construction, regardless of material specification, with P-Numbers.

Code Book: IX

Part:



Subpart/Table: Introduction


Subpart/Table: Article I




QW-193.1.3 Revision The current requirements specify examination of the section at a minimum of 10X magnification. Obviously, if one looks at a section at sufficiently high magnification, one can find some places where complete fusion of the weld deposit into the tubesheet and tube wall face is not achieved. Accordingly, this revision changes the requirement from a minimum of "10X" to "10 to 20X".

QW-253 - QW-260 & QW-264, QW-284, QW-384, QW-403.13, QW-420.1, QW/QB-422, QW-423, QW/QB-492 & Appendix D

Revision With the incorporation of the new Creep-Strength Enhanced Ferritic (CSEF) alloys into the Code, using the existing P-Number groupings to specify PWHT parameters can lead to variations in heat treatments that may significantly degrade the physical properties of these alloys; causing serious safety concerns. A Creep Strength Enhanced Ferritic (CSEF) alloy is a family of ferritic steels whose creep strength is enhanced by the creation of a precise condition of microstructure, specifically martensite or bainite, which is stabilized during tempering by controlled precipitation of temper-resistant carbides, carbo-nitrides, or other stable phases.

In the 2007 Edition of the Code, only P-No. 5B Gr. 2 (Grade 91) met this definition and was approved for Code construction. Looking forward, a number of CSEF alloys are already in use in Code Cases and drawing near to incorporation. To prevent confusion, a new series of P-Numbers have been developed to address CSEF alloys. Following is a summary of Section IX revisions associated with this action:• Revised all QW-253 through QW-260 and QW-264 Tables where variable QW-403.13 is addressed to delete reference to QW-403.13• Revised QW-284 to replace P-No. 11 with P-No. 15F.• Revised QW-384 to replace P-No. 11 with P-No. 15F.• Deleted QW-403.13. Requirements now addressed in QW-420. • Revised QW-420.1 “P-Numbers and S-Numbers” to explain that P-Numbers are alphanumeric and replace P-No. 11 with P No. 15F.• Revised QW/QB-422 {P-Number Tables) to remove P No. 5B Group 2 and replace with 15E Group 1.• Revised QW-423 “Alternate Base Metals for Welder Qualification” to remove P-No. 11 and replace with P No. 15F.• Added Definition of CSEF Alloys to QW/QB-492• Revised Appendix D (Numerical List of P-Numbers) to remove P No. 5B Group 2 and replace with “15E Group 1”

NOTE: In the A09 addenda there are T91 (9Cr-1Mo-V) CSEF materials that were missed when P-No.s were reassigned to P-No. 15E Group 1, such that these materials are still listed under P-No. 5B Group 2. P-No. 5B Group 2 (9Cr-1Mo-V) materials in QW/QB-422 should be listed under P-No.15E Group 1 grouping.

QW-290.2 Errata Corrected the previous reference in the 6th line of QW-290.2 from "QW-290.5" to "QW-290.6".

Subpart/Table: Article II


Subpart/Table: Article III




QW-363; QW/QB-422 & Index

Errata The action corrected errors in: QW-363 reference to QW-192.2; SB/EN 1706 Minimum Specified Tensile strength value shown in Table QW/QB-422; and UNS No. for SA-790 shown in Appendix D. This also corrected the paragraph that referenced AWS shown in the Index.

QW-404.23 Revision Revised QW-404.23 to add the words "flux-coated solid or metal cored". QW-404.23 does not address the use of flux coated wire for GTAW procedure or performance qualification, only flux cored, bare (solid), metal cored, or powder. Flux coated wires are being produced by taking a solid bare wire that has been produced to an AWS/SFA Specification with a AWS Classification (e.g. ER308) and applying a flux coating. This flux coating is not addressed by the SFA filler metal specification, so the addition of the coating results in the material also becoming an unlisted filler material under QW-404.4, which is an essential variable. Based on industry experience with flux-cored GTAW filler metals and similar experience with flux-coatedGTAW filler metals, a change in product form to flux-coated filler metals should be considered an essential variable for both procedure and performance qualification.

QW-405.1 Revision Paragraph QW-405.1 added a reference to QW-203 to highlight to users that there are special weld positional rules for procedure qualification. The change will clearly distinguish positional requirements between performance qualification and procedure qualification.

QW-424 Revision The change is to satisfy one of the recommendations made by the Task Group on P-Numbers to BPV Committees I, III, VIII and B31.1 to create specific rules in SectionIX to address old qualifications with P-No. 5B Group 2 vs. Group 1. This change will allow PQRs made with assigned P-No. 15E (9Cr-1Mo-V) base metals to continue to qualify weld procedures for P-No. 5B (9Cr-1Mo) base metals in addition to weld procedures for P-No. 15E base metals.

QW-442 Revision Revised QW-442 A-Numbers table to lower the upper range amount of chromium under A-No.4 from 6% to 4% and the lower range amount under A-No.5 from 6% to 4%.This change is to correct the A-Number for 5% Cr -½%Mo filler metals used in 5%Cr - ½%Mo P-No.5B Group1 base metal welding applications. Presently, 5%Cr - ½%Mo filler metals in this application fall under A-No.4 along with 2¼%Cr - ½%Mo filler metals used in P-No. 5A Group1 base metal applications. The correct A-Number should be A-No.5 so as to be consistent with the filler metal/base metal combinations of the other P-No. 5B base metals

QW/QB-422 Revision The action added SB-653 UNS R60702, seamless and welded fittings to Table QW/QB-422.

QW/QB-422 Revision Addition of SB-956 UNS C70600 and C71500 to Table QW/QB-422 and to Appendix D

QW/QB-422 Revision Brazing P-Number added for previously unassigned SA-656 material specifications

QW/QB-422 Revision Added B16.50 Wrought Copper and Copper Alloy Braze Joint Pressure Fittings to Table QW/QB-422 and assign to P-No. 107 brazing number.

QW/QB-422 and Appendix D

Revision Added SA-268 TP430Ti, UNS S43036 material to Table QW/QB-422 and Appendix D

QW/QB-422 and Appendix D

Revision Deleted SA-517 Gr. J from Table QW/QB-422 and Appendix D.

Subpart/Table: Article IV




QW/QB-422 & AppendixD

Revision P-No. 26 category was created for aluminum-alloy castings as a result of interest in EN cast aluminum materials. This action moves ASTM/ASME cast aluminum-alloys into the same P-Number category.

QW/QB-422 & AppendixD

Revision This action involves the incorporation of Case 2484 which permitted the use of solution annealed 58Ni-33Cr-8Mo alloy in wrought sheet, plate and strip (SB-575), rod (SB-574), welded pipe (SB-619) and tube (SB-626), wrought fittings (SB-366), seamless pipe and tube (SB-622) and forgings (SB-462,SB-564) for VIII-1 construction.

QB-100.3, QB-202.1, QB-322, QB-409.1, QB-483, & QB-484

Revision The word "conditions" is often used in this Section when other terms, e.g., factors, variables, rules, standards, requirements, or parameters would be more appropriate. The revisions are being made to use terms that are most appropriate for the context of the paragraph.

QB-200.3, QB-420.1(c),QB-402.2(c ), QB-482, QB-483, QB-484, & Nonmandatory Appendix D

Revision This revision reassigns all the existing S-Number materials in Table QW/QB-422 as P-Number materials for welding and brazing procedure qualification purposes and deletes all reference to S-Numbers from appropriate paragraphs of Section IX.

P-Numbers are assigned to ASME materials to reduce the number of welding and brazing procedure qualifications required of Certificate holders. A number of years ago the issue of reducing the number of qualification tests required for welding/brazing non-ASME materials used in the B31 Code for Pressure Piping and selected BPVC Code Cases was raised. Rather than anoint those materials with P-Numbers, the decision was made to assign a new designation “S-Numbers” to these materials. Since 1989 Subcommittee IX has been assigning S-Numbers to mostly ASTM materials the B31 Code and BPVC Code Cases.

Since the criteria for both P-Numbers and S-Numbers are based on chemical composition, mechanical properties, weldability and brazeability, Subcommittee IX has questioned the need for separating ASME and non-ASME materials into P- and S-Numbers. The assignment of a material as a P-Number (rather than an S-Number) rests solely on whether or not the base material has design allowable stress values in Section II Part D or B31. The reality is that whether or not a base material has design allowable stresses does not alter the welding characteristics of that material. With this basis in mind, it was decided to delete the S-Numbers and classify all weldable materials identified for use in pressure retaining or component support construction, regardless of material specification, with P-Numbers.

Subpart/Table: Article XI


Subpart/Table: Article XII


Subpart/Table: Article XIV




QB-408.1 & QB-408.4 Revision Revised QB-408.1 to clarify that a decrease in overlap is permitted and revised QB-408.4 to clarify that an increase in overlap is permitted. A Code user pointed out that original words of QB-408.1 only imply that less overlap than qualified is allowed without requiring requalification, causing confusion. As item was being considered, it was noted that QB-408.4 implied permission of an overlap variance in a similar manner, and should therefore also be clarified.

QB-432 Revision As a result of changes to the brazing filler metal classifications made by AWS in the latest A5.8/A5.8M it was necessary to revise QB-432 to keep current with ASME's adoption of SFA-5.8/SFA-5.8M. The revision to QW-432 added and classified brazing filler metals into the table.

Appendix E Revision Updated Section IX listing of SWPSs based on new/revised AWS Specifications. The action is to keep references current with the published editions of the AWS SWPSs.

2142-3 Revision Code Case 2142-2 was revised to assign F-No. 43 to a new compositional version of "Filler Metal 52", a nickel filler metal for welding Alloy 690 base metals. The latest version, UNS N06055, includes Mo and increased Nb.

Subpart/Table: Appendix E







Forms Errata On RP-1 entry field no. 8 corrected to read "Date"; RP-2 and RP-4 entry field no. 2 corrected to read "Purchaser"; RP-3 entry field no. 16 added a comma.

Code Book: X

Part:



Subpart/Table: Forms




IWA-2430 & IWA-2431 Revision IWA-2430(g) previously indicated that "The inspection intervals for inservice examination of Class CC components shall be in accordance with the requirements of IWL-2400." However, Subsection IWL-2400 did not refer to inspection intervals. Instead, Subsection IWL schedules examinations on a 5-year frequency. As such, IWA-2430(g) could have be interpreted to mean that an inspection interval for Class CC components is five years rather than 10 years. The change clarifies that, for Class CC components, an inspection interval consists of ten years..

1. IWA-2430(c)(1) and (c)(3) were revised to add provisions allowing an Owner to extend or reduce an inspection interval beyond the +/- 12 months previously permitted by IWA-2430(c). This change allows an inspection interval to be reduced without restriction, provided all of the examinations required for the interval have been completed.

2. IWA-2430(g) was revised to clarify inspection interval requirements for Class CC components.

3. IWA-2431 was revised to add references to IWA-2430(c) and IWA-2430(d).

IWA-4000 Various Revision IWA-4000 was researched for terms containing the root words of "adequate", "consider", "determine", "evaluate", "practicable", "sufficient", and "suitable". Terms containing these root words were revised or deleted where their usage was considered ambiguous. Affected paragraphs included: IWA-4142(a)(2), IWA-4224.1(b), IWA-4224.2(b), IWA-4311(a) and (e), IWA-4461.4.1(d), IWA-4462(b), IWA-4652.4, IWA-4652.4(d)(3), IWA-4711.2.1(d)(3), IWA-4712.2(a)(6), IWA-4713.3(a)(2)(a), IWA-4713.3(a)(4)(a), IWA-4723.2.1(d)(3), and IWA-4725.2.1(d).

IWA-4132 Revision Revised IWA-4132 to include control rod drive mechanisms, pumps, and pump seal packages, when they too are rotated from stock solely for testing or preventive maintenance purposes.

IWA-4711.2.1(a)(13) Revision Clarified the requirements for "standoff" for explosive tube plug welding procedure qualification in IWA-4711.2.1(a)(13).

IWA-5244(b) Revision IWA-5244(b)(1) for buried components refers to a configuration where the system is isolable by means of valves. By adding a clarification to IWA-5244(b)(1), a definition for isolable relative to pressure testing is provided in lieu of the broader definition of isolable in the IWA-9000 glossary.

IWA-5300 Revision Replaced the ambiguous words "evidence of structural distress" with "other relevant conditions".

IWA-6210 and IWA-6211 Revision Revised IWA-6210 to "Responsibilities" and added new title IWA-6211 "Owner's Responsibilities". New paragraph IWA-6211(f) was established to address the Owner's responsibility for requiring the contracted Repair/Replacement Organizations to provide a report documenting their repair/replacement activities.

IWA-6212 Revision IWA-6212 was added to establish the contracted Repair/Replacement Organization's responsibility to prepare a report, acceptable to the Owner, documenting their repair/replacement activities.

Code Book: XI

Part: Div. 1

Subpart/Table: IWA




IWA-6350 Revision Added IWA-6350(e) requiring retention of documents certifying repair / replacement activities by the contracted Repair/Replacement Organizations.

IWA-9000 Revision The definition of "evaluation" was deleted as being ambiguous. The definition of "rerating" in IWA-9000 was revised to identify that "rerating" may include physical work and to be consistent with IWA-4330.

Table IWA-1600-1 Revision The reference information for standards and specifications listed in Table IWA-1600-1 was updated. "Note (1)" was added with respect to water chemistry standards."Organization of Section IX", Article 8 - "References" (page xxxvi) was also updated to reflect the changes in Table IWA-1600-1.

IWB-2420 Revision Revised IWB-2420(c) and added IWB-2420(d) to require additional examinations in accordance with IWB-2430 when new flaws or significant changes in flaw characteristics resulted in necessary corrective actions in accordance with IWB-3132.2 and IWB-3142.3.

IWB-2420 and IWB-2430(e)

Revision Added Requirements to Define “Evaluation” Under IWB-2420 and IWB-2430(e) for Welded Attachments. Previously, the requirements for successive and additional examinations of welded attachments in IWB-2420(e), IWB-2430(e) stated that successive and additional examinations would be determined based on an evaluation by the Owner. This revision provides the needed clarity to state what the evaluation is required to determine and the subsequent action to be taken.

IWB-3430 Revision IWB-3430 was revised to state that flaws that meet the requirements of IWB-3500 for the respective examination category shall be acceptable.

IWB-3514 Revision IWB-3514 was revised to clarify that the stated acceptance standards do not apply toplanar-surface connected flaws that are in contact with the reactor coolant environment during normal operation and are detected by inservice examinations in listed materials for PWRs and BWRs. IWB-3514(b) was added stating that susceptible materials and mitigation criteria for BWRs are specified in NUREG 0313Rev. 2, Sections 2.1 and 2.2.

IWB-3514.1(a) Revision The revision specifies different restrictions and requirements for use of the Acceptance Standards for surface-connected flaws that are in contact with reactor coolant environments during normal operation and are detected by either preservice examination in materials that are susceptible to stress corrosion cracking. For planar surface-connected flaws that have been detected by preservice volumetric examination in stress corrosion cracking susceptible materials in reactor coolant environments, two subsequent reexaminations are required per IWB-3514.8. These additional reexaminations are required to address the potential for flaw growth due to stress corrosion cracking.

IWB-3514.2(b) Revision The term "indications" in the first sentence was replaced by "flaws"

IWB-3514.3 Revision In IWB-3514.3(a) and (b), previous references to "Table IWB-3514-2" for allowable flaw sizes have been changed to "Table IWB-3514-1"; In IWB-3514.3(b), reference to the allowable standards of "IWB-3514.7" has been added.

IWB-3514.7 Revision The subparagraph title was revised to include linear flaw standards for austenitic piping. References to Table IWB-3514-2 for flaw size limits for austenitic piping wereadded to IWB-3514.7(a) and (b).

Subpart/Table: IWB




IWB-3514.8 Revision A new IWB-3514.8 for planar surface-connected flaws that are in contact with the reactor coolant environment that are detected by preservice examination in materialssusceptible to stress corrosion cracking was added. IWB-3514.8 requires two subsequent reexaminations at time intervals as stated in the subparagraph.

IWB-3600 Revision (a) Replaced the word “Flaws” with “Planar Flaws” in the title of IWB-3600, IWC-3600and IWD-3600; (b) Added clarification to paragraphs IWB-3642 and IWB-3644 that flaw depths are limited to 75% of the wall thickness; and (c) Moved the failure assessment diagram detailed procedure from paragraph IWB-3643 to Nonmandatory Appendix H.

Table IWB-2500-1 Revision Deleted "Note (1)" regarding acceptance standards of IWB-3514 and renumbered / reorganized remaining "Notes".

Tables IWB-3514-1 and IWB-3514-2

Revision Table IWB-3514-1 was completely revised to combine allowable planar flaws for both inservice and preservice examinations as well as for both ferritic and austenitic steel materials.Previous Table IWB-3514-2 (Allowable Planar Flaws for Austenitic Steels) was replaced by new Table IWB-3514-2 "Allowable Linear Flaws" (for Austenitic Steels).

IWC-2420 Revision Added new paragraph IWC-2420(e) to require additional examinations in accordance with IWC-2430 when new flaws or significant changes in flaw characteristics resulted in necessary corrective actions in accordance with IWC-3122.2 and IWC-3132.2.

IWC-2420(e) and IWC-2430(d)

Revision Added Requirements to Define “Evaluation” Under IWC-2420 and IWC-2430 for Welded Attachments. Previously, the requirements for successive and additional examinations of welded attachments in IWB-2420(e) and IWB-2430(d) stated that successive and additional examinations would be determined based on an evaluation by the Owner. This revision provides the needed clarity to state what the evaluation is required to determine and the subsequent action to be taken.

IWC-2500(b). Revision The spacing within the in-text Table for the "Examination Area" under "Examination Category C-C" was corrected.

IWC-3430 Revision IWB-3430 was revised now state that flaws meeting the requirements of IWC-3500 for the respective examination category shall be acceptable.

IWC-3514 Revision Acceptance Standards for Class 2 and 3 piping did not previously exist in Section XI. A new Table IWC-3514-1 was added to provide flaw Acceptance Standards for Class2 austenitic piping using the same approach that was applied to develop the new Table IWB-3514-1. Based on the similarity of Class 2 and 3 piping, and on structural integrity considerations, Table IWC-3514-1 is also applicable to Class 3 austenitic piping; paragraphs IWC-3514.1 through IWC-3514.6 were added.

IWC-3600, 3642, 3643 and 3644

Revision (a) Replaced the word “Flaws” with “Planar Flaws” in the title of IWC-3600; (b) Added clarification to paragraphs IWC-3642 and IWC-3644 that flaw depths are limited to 75% of the wall thickness; and (c) Moved the failure assessment diagram detailed procedure from paragraph IWC-3643 to Nonmandatory Appendix H.

Subpart/Table: IWC




Table IWC-3514-1 Revision Acceptance Standards for Class 2 and 3 piping previously did exist in Section XI. A new Table IWC-3514-1 that provides flaw Acceptance Standards for Class 2 austenitic piping was developed using the same approach that was applied to develop the new Table IWB-3514-1. Based on the similarity of Class 2 and 3 piping, and on structural integrity considerations, Table IWC-3514-1 is also applicable to Class 3 austenitic piping.

Tables IWC-3510-1 and IWC-3511-1

Revision Allowable flaw sizes given in Tables IWC-3510-1 and IWC-3511-1 were revised to eliminate inconsistencies in acceptance sizes between surface and subsurface indications. This revision also lowered the acceptance standards for subsurface flaws for thicknesses less than or equal to 0.5 inch and "a/L" greater than 0.35. In addition the "Y" factor was revised to "Y to the n power" and the acceptance standard on "a/t" for subsurface flaws was limited to approximately 15%.

Figure IWD-2500-1 Revision Figure IWD-2500-1(b) was revised to add a note indicating that the examination of the welded attachment on Class 3 components may be limited to exterior surfaces. A similar provision existed for Class 2 components. This change was a result of the approval of Intent Interpretation IN07-11.

IWD-2430(b) and IWC-2430(d)

Revision The previous words “root cause” were changed to “apparent or root cause” to be consistent with an Owner’s use of these terms in a corrective action program.In IWD-2430(d) documentation of the Owner's evaluations and instances where no additional examination are required were elaborated.

IWD-2500(b). Revision The title within the in-text Table for the "Examination Area" under "Examination Category D-A" was corrected to include "Pressure Vessels"..

IWD-3600, 3642, 3643, and 3644

Revision (a) Replaced the word “Flaws” with “Planar Flaws” in the title of IWD-3600; (b) Added clarification to paragraphs IWD-3642 and IWD-3644 that flaw depths are limited to 75% of the wall thickness; and (c) Moved the failure assessment diagram detailed procedure from paragraph IWD-3643 to Nonmandatory Appendix H.

Table IWD-2500-1. Revision Revised Table IWD-2500-1 to change the titles of "Examination Category" D-A to refer to “Pressure Vessels”, and to clarify that the examination requirements do not apply to atmospheric or 0 to 15 psig (0 kPa to 100 kPa) storage tanks. Also, added "Note (1)". These actions were the result of the approval of Intent Interpretation IN 07-10.

Subpart/Table: IWD


Subpart/Table: IWL




IWL-1220 and IWL-2510 Revision Based on NUREG-1801, NUREG-1800 and other applicable documents:(1) IWL-1220(b) was revised and IWL-1220(c) and IWL-1220(d) were added to clarifyspecific areas exempted from examination. IWL-1220(c) and IWL-1220(d) incorporated requirements for the performance of an evaluation to determine examination requirements for inaccessible areas when suspect conditions are identified in accessible areas.(2) IWL-2511 was added to be specific to examinations required for accessible areas and differentiate between those and the additional requirements required for inaccessible areas (i.e. IWL-2512).(3) IWL-2511(a) was revised to add reference to new paragraphs IWL-1220(c) and IWL-1220(d); and to add provisions that inaccessible areas shall be evaluated for additional examinations when conditions warrant.(4) IWL-2511(d) was revised to pluralize the term “examination” to be consistent with paragraphs IWL-2511(a), IWL-2511(b) and IWL-2511(c).(5) IWL-2512(a) was added to be specific to actions required for the performance of an evaluation to determine examination requirements for inaccessible areas.(6) IWL-2512(b) and IWL-2512(c) were added in consideration of sub-grade containment concrete foundations.

Table IWL-2500-1 Revision Added Row under "Examination Category L-A" for Line Item L1.13 - "Inaccessible Below-Grade Areas" as well as references to new "Note (2)" and "Note (3)"

Table IWL-2525-1 Revision The reference information for standards and specifications listed in Tables IWL-2525-1 was outdated. This action adds, deletes, and updates references.

Mandatory Appendix II Errata Corrected spelling of the word "Symbol" on Line 3 of Form NIS-2; Removed extra spacing in "Certificate of Inservice Inspection" box.

Mandatory Appendix II Revision Revised Line 23 "Guide for Completing Form NIS-2" to refer to the Repair / Replacement Organization's certifications, such as the RRA-1 Form for contracted repair / replacement activities now incorporated in "Nonmandatory Appendix T".

Mandatory Appendix IX Revision Mandatory Appendix IX, was researched for terms containing the root words of "adequate", "consider", "determine", "evaluate", "practicable", "sufficient", and "suitable". Terms containing these root words were revised or deleted where their usage was considered ambiguous. Revisions were made in IX-3100 first sentence) and IX-3300 subparagraphs (a) and (c) through (e).

Mandatory Appendix VIII

Errata Corrected SI equivalent of 1 in. from "(13 mm)" to "(25 mm)".







Nonmandatory Appendix C

Revision Analytical procedures and material properties for accurate evaluation of flaws in piping and welds fabricated of Alloy 600/82/182/132 have been incorporated into Nonmandatory Appendix C. Procedures are applicable to both PWR and BWR environments. The technical basis has been developed to support the change. Numerous values were added or revised in C-1300 "Nomenclature" Technical revisions were made to the following: C-3200(a)(2), C-6100, C-6330(c), Tables C-6410-1 and C-6410-2, C-8411, Figs. C-8410-2 and C-8410-2M, C-8500, C-8510, C-8511, Tables C-8510-1 and C-8510-1M, C-8512 and Figs. C-8510-1, C-8510-1M, C-8510-2 and C-8510-2M.

Nonmandatory Appendix H

Revision (a) Revised the equation for the membrane plus bending stress limit load cutoff for circumferential flaws in paragraph H-4410 to be consistent with the Nonmandatory Appendix C limit load equation for circumferential flaws; and (b) Revised the failure assessment diagram detailed procedure from paragraphs IWB/C/D-3643, IWC-3643 were moved to Nonmandatory Appendix H. (H-1110).

Nonmandatory Appendix H

Revision (a) Revised H-1100 second sentence to refer to the criteria of H-1110; (b) Paragraphs H-1200(e) through (g) revised; (c) Revised H-1300 definition of "S cutoff"; (d) Revised H-4300(b); (e) Revised H-4400; (f) Revised Figures H-4300-1 and H-4300-2.

Nonmandatory Appendix J

Revision Deleted the ambiguous word "considered" in the last sentence of J-1000(a).

Nonmandatory Appendix O

Errata Removed the word "Upper" from the titles of Nonmandatory Appendix O.

Nonmandatory Appendix Q

Revision Paragraphs Q-4100(c), Q-4100(c)(3), Q-4200(b) and Q-4300(c) were revised to incorporate paragraph and table reference changes to acceptance standards noted in IWB-3514 for Class 1 piping and in IWC-3514 for Class 2 austenitic piping.

Nonmandatory Appendix R

Revision Nonmandatory Appendix R provides risk-informed inspection requirements for piping. Additional technical detail was provided to remove ambiguity from Nonmandatory Appendix R paragraph 4.2.6.In paragraph 4.2.9, "e.g." was removed.


Revision Ambiguous wording was removed from the following Supplements: Supplement 1 - Paragraphs 2.1, 2.6, 4.2.4, 4.2.5(d)(2), 4.2.5(e)(3), 4.2.5(f), 4.2.6 and 4.2.9(d)(1) through (d)(3).Supplement 2 - Table R-S2-1 "Note (1)" was revised to add the word "known" as wellas stating that water hammer "is a cause for a higher examination zone ranking" rather than as previously stated that it "could be a cause".


Revision (a) Dated references to ASME RA-S were removed from R-1310; (b) Ambiguous wording removed from R-1320.

Nonmandatory Appendix T

Revision New "Nonmandatory Appendix T - Reporting of Contracted Repair / Replacement Activities" provides Report Form RRA-1 used for documenting contracted repair/replacement activities and to assist the Repair/Replacement Concern in completing and filing the form and the Owner in completing and filing the NIS-2. ThisAppendix is intended for use when there is no other certification program imposed on a contracted Repair / Replacement Organization for the repair / replacement activities being performed. (T-1100).





Code Case N-765 Revision Problems arose where utilities wanted to synchronize the inspection schedules for two or more units and merge these programs, resulting in common programs, procedures, and personnel qualifications. The Code Case was developed to address concerns initially identified by the Special Working Group – Plant Life Extension (PLEX). The SWG PLEX took an action item to solicit input from utilities regarding a change in Section XI to facilitate flexibility for adjusting inspection intervalschedules.



Foreword Revision Revised the Foreword is to add a text update on international material specifications currently in Section II Part A. A Table with Acceptable Non-ASTM Editions has been created in Section II, Parts A and B. The Table is similar to the Acceptable ASTM Editions. The revision deleted "ASTM" from "Acceptable ASTM Editions" references.

TG-130.1 Addition Revised Nonmandatory Appendix E to make it applicable for both cryogenic portable tanks and cryogenic cargo tanks, also additional references were added to TG-130.1for cryogenic service. The Appendix provides guidance for the design and construction requirements beyond the scope of Section XII and addresses requirements presently in the US DOT Code of Regulations.

TS-200.5(c) Revision Revised TS-200.5(c) to include Tank Class Number(s) on the Certificate of Authorization.

3-1.5(e)(6) Revision Paragraph 3-1.5(e)(6) revised to refer to new Mandatory Appendix XIII. This new Appendix provides the user with two different methods for determining equivalent thickness, based on the Competent Authority's specified minimum thickness.

3-1.7 Revision Revision to Article 1, Paragraph 7 of Modal Appendix 3 is to harmonize Section XII requirements with the requirements of the US DOT and United Nations.

Appendix 1-1.4(c)(3) Revision The revision is for Dynamic Load Condition "C" to allow for a 20% increase in the allowable compressive and tensile stress when analyzing longitudinal bending for US DOT cargo tanks. The affected cargo tank categories are: 406, 407 and 412.

Appendix 1 & VIII Revision This revision contains necessary revisions to Modal Appendix 1 and Mandatory Appendix VIII. There are many instances where units have been corrected to contain the appropriate number of significant figures. Three significant figures has been deemed acceptable for soft conversions of bar (1.03 bar = 15 psi). Other revisions either fix errors that appeared in the 2004 edition of Section XII or clarify the text.

Code Book: XII

Part:



Subpart/Table: Part TG


Subpart/Table: Part TS


Subpart/Table: Modal Appendices




Appendix 4 Addition This new Modal Appendix added specific requirements to Section XII for Ton Tanks that are intended to transport compressed gases. It carries over all the requirementsof the applicable US DOT regulations, 49 CFR 179.300. A companion Mandatory Appendix providing the requirements for forge-welding the heads to the shells of the Category 106A tanks has been added together with this addition, showing the acceptability of the Category 106A tanks, particularly the acceptability of exempting the SA 285 Grade A material of construction from impact testing.

Appendix XIII Addition This new Mandatory Appendix provides the user with two different methods for determining equivalent thickness, based on the Competent Authority's specified minimum thickness. This Appendix supports Modal Appendix 1. This formula facilitates the determination of equivalent minimum thickness for penetration resistance of materials other than steel

Appendix XIV Addition This Appendix includes requirements for hot pressure welded (or forge welded) jointfor head-to-shell welds of Ton Containers. An FEA analysis was used to show the acceptability of US DOT Category 106A tanks, particularly the acceptability of exempting the SA 285 Grade A material of construction from impact testing.

Appendix E Revision Revised Nonmandatory Appendix E so that it is applicable for both cryogenic portable tanks and cryogenic cargo tanks. The Appendix provides guidance for the design and construction requirements beyond the scope of Section XII and addresses requirements presently in the US DOT Code of Regulations.

Appendix H Addition Non Mandatory Appendix H to Sect XII, Transport Tanks is related to cargo tanks specifically and as explained in its scope, covers necessary matters required by a Competent Authority (CA) (in this case the U. S. Department of transportation (DOT)) that are beyond the scope of ASME responsibility which is limited to the pressure retaining elements of the cargo tank. The initial edition will cover the present DOT regulations as published and interpreted so that Section XII can be used by industry as soon as possible.

2413-1 Revision Code Case 2413 had several references to ASME Section VIII, Div. 2, 2004 Edition 2006 Addenda and cannot readily be used in conjunction with the 2007 Edition. Code Case 2413-1 is limited to the 2004 Edition 2006 Addenda and earlier.



Subpart/Table: NonMandatory Appendices




2009 addenda synopsis w exec summary - all sections

Documents

asme code edition synopsis

code users

asme bpv code sections

hsb code services asme

listing of code cases

asme bpv standards committee

actual code rules

addenda revisions