b31.3 code cases · b31 case 178 b31 case 178 continues on following page cases of the code for...
TRANSCRIPT
NOTICE REGARDING CODE CASES OF THE ASME B31 CODE FOR PRESSURE PIPING
All B31 Code Cases in effect as of September 21 2007 will remain available for use unless annulled by the B31 Standards Committee
B31 CASE 178
B31 Case 178 continues on following page
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 Case 178 Providing an Equation for Longitudinal Stress for Sustained Loads in ASME B313
Construction
Approval Date May 6 2005 This Case shall expire on May 1 2008 unless previously annulled or reaffirmed
Inquiry
ASME B313 provides a description for determining SL for sustained loads Is there an equation that may be used Reply
It is the opinion of the committee that in the absence of more applicable data and in accordance with para 30235(c) the following equation may be used to calculate SL for sustained loads
22 )2()|(| tbaL SSSS ++= where
the definitions in para 31944 apply and
Sa = stress due to axial loads1 = FaAp
Fa = longitudinal force due to pressure2 weight and other sustained loadings
Ap = cross-sectional area considering nominal pipe thickness less the sum of the mechanical (thread or groove depth) corrosion and erosion allowances
Sb = resultant intensified bending stress3 due to pressure weight and other sustained loadings
ZMIMI
S ooiib
22 )()( +=
Ii = in-plane sustained stress index4 In the absence of more applicable data Ii is taken as the greater of (075ii) or 100
Io = out-plane sustained stress index4 In the absence of more applicable data Io is taken as the greater of (075io) or 100
St = torsional stress3 due to pressure weight and other sustained loadings1 = Mt2Z
NOTES 1 In the absence of more applicable data Sa and St need not be intensified
B31 CASE 178
2 Fa includes the longitudinal force due to pressure iAPtimes for piping systems that contain no
expansion joints where 42dAi times=π and d is the pipe inside diameter considering pipe wall thickness less allowances For piping systems with expansion joints it is the responsibility of the designer to determine the longitudinal force due to the pressure in the piping system
3 Z shall be based on the nominal section less the sum of the mechanical (thread or groove depth) corrosion and erosion allowances
4 It is the responsibility of the designer to determine Ii and Io in cases where these indices are based on stress intensification factors it is the responsibility of the designer to determine ii and io for all components not explicitly addressed in Appendix D (eg elbowsbendsmiters other than 90 degrees base-ells reducing elbows crosses etc)
B31 CASE 180
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 CASE 180 Leak Testing of Subassemblies of Jacketed Piping for use in ASME B313 Piping
Systems
Approval Date January 5 2007 Inquiry Does ASME B313 permit an alternate leak test for jacketed piping in which it is impracticable to visually examine the welded joints and connections for leaks in accordance with para 34522(a) Reply Visually observing the joints and connections during the leak test in accordance with para 34522(a) and 34531 is not required provided all of the following conditions are satisfied
1 The welded joints and connections are on the inner pipe of jacketed piping 2 A leak test is performed that otherwise meets the requirements of para 3451
except visual examination of joints and connection in accordance with para 34522(a) and 34531 is not required
3 A sensitive leak test is performed in accordance with para 3458 to demonstrate leak tightness of welded joints and connections that are not visually examined during the leak testing requirements in 2 above
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
Original Inquiry Under what conditions and limitations may alternative UT acceptance criteria apply in lieu of those described in para 34462 of ASME B313 When specified by the owner the ultrasonic examination acceptance criteria included below may be applied for welds in material greater than or equal to 25mm (10 in) in thickness1 in accordance with ASME B313 provided the following requirements are met 1) GeneralScope
a) The examination shall be conducted using automated or semi-automated techniques utilizing computer based data acquisition
b) The examination shall be performed in accordance with a written procedure approved by a Level III and conforming to the requirements of ASME Section V Article 4 Mandatory Appendix VIII and i) For Phased Array ndash ASME Section
V Article 4 Mandatory Appendix V
ii) For Time of Flight Diffraction (TOFD) - ASME Section V Article 4 Mandatory Appendix III
c) Procedure qualification shall meet the requirements of ASME Section V Article 4 Mandatory Appendix IX
2) Equipment A mechanical guided scanner capable of maintaining a fixed and consistent search unit position relative to the weld centerline shall be used
3) Personnel a) Set-up and scanning of welds shall be
performed by personnel certified as Level II or III (or by Level I personnel under the direct supervision of Level II personnel)
b) Interpretation and evaluation of data shall be performed by Level II or III personnel
c) Examination personnel shall be qualified and certified following a procedure or program as described in ASME BPV Code Section V Article 1 T-120 (e) (f) (h) and (i)
d) Personnel demonstration requirements shall be as stated in ASME Section V Article 4 Mandatory Appendix VII
4) Examination a) The initial straight beam scan for
reflectors that could interfere with the angle beam examination shall be performed (a) manually (b) as part of a previous manufacturing process or (c) during the weld examination provided detection of these reflectors is included in the demonstration as required in 1(c) above
b) The examination area shall include the volume of the weld plus the lesser of 25mm (10 in) or t of adjacent base metal Alternatively the examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6mm (025 in) of base material beyond the heat affected zone on each side of the weld provided the extent of the weld HAZ is measured and documented
c) Scanning may be peformed at reference level provided the procedure qualification was performed at reference level
5) Data Recording Data shall be recorded in the unprocessed form with no thresholding The data record shall include the complete examination area as specified in (4)(b) above
1 For wall thicknesses less than 25mm (10 in) the acceptance criteria stated in paragraph 34462 of B313 shall be used
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 178
B31 Case 178 continues on following page
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 Case 178 Providing an Equation for Longitudinal Stress for Sustained Loads in ASME B313
Construction
Approval Date May 6 2005 This Case shall expire on May 1 2008 unless previously annulled or reaffirmed
Inquiry
ASME B313 provides a description for determining SL for sustained loads Is there an equation that may be used Reply
It is the opinion of the committee that in the absence of more applicable data and in accordance with para 30235(c) the following equation may be used to calculate SL for sustained loads
22 )2()|(| tbaL SSSS ++= where
the definitions in para 31944 apply and
Sa = stress due to axial loads1 = FaAp
Fa = longitudinal force due to pressure2 weight and other sustained loadings
Ap = cross-sectional area considering nominal pipe thickness less the sum of the mechanical (thread or groove depth) corrosion and erosion allowances
Sb = resultant intensified bending stress3 due to pressure weight and other sustained loadings
ZMIMI
S ooiib
22 )()( +=
Ii = in-plane sustained stress index4 In the absence of more applicable data Ii is taken as the greater of (075ii) or 100
Io = out-plane sustained stress index4 In the absence of more applicable data Io is taken as the greater of (075io) or 100
St = torsional stress3 due to pressure weight and other sustained loadings1 = Mt2Z
NOTES 1 In the absence of more applicable data Sa and St need not be intensified
B31 CASE 178
2 Fa includes the longitudinal force due to pressure iAPtimes for piping systems that contain no
expansion joints where 42dAi times=π and d is the pipe inside diameter considering pipe wall thickness less allowances For piping systems with expansion joints it is the responsibility of the designer to determine the longitudinal force due to the pressure in the piping system
3 Z shall be based on the nominal section less the sum of the mechanical (thread or groove depth) corrosion and erosion allowances
4 It is the responsibility of the designer to determine Ii and Io in cases where these indices are based on stress intensification factors it is the responsibility of the designer to determine ii and io for all components not explicitly addressed in Appendix D (eg elbowsbendsmiters other than 90 degrees base-ells reducing elbows crosses etc)
B31 CASE 180
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 CASE 180 Leak Testing of Subassemblies of Jacketed Piping for use in ASME B313 Piping
Systems
Approval Date January 5 2007 Inquiry Does ASME B313 permit an alternate leak test for jacketed piping in which it is impracticable to visually examine the welded joints and connections for leaks in accordance with para 34522(a) Reply Visually observing the joints and connections during the leak test in accordance with para 34522(a) and 34531 is not required provided all of the following conditions are satisfied
1 The welded joints and connections are on the inner pipe of jacketed piping 2 A leak test is performed that otherwise meets the requirements of para 3451
except visual examination of joints and connection in accordance with para 34522(a) and 34531 is not required
3 A sensitive leak test is performed in accordance with para 3458 to demonstrate leak tightness of welded joints and connections that are not visually examined during the leak testing requirements in 2 above
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
Original Inquiry Under what conditions and limitations may alternative UT acceptance criteria apply in lieu of those described in para 34462 of ASME B313 When specified by the owner the ultrasonic examination acceptance criteria included below may be applied for welds in material greater than or equal to 25mm (10 in) in thickness1 in accordance with ASME B313 provided the following requirements are met 1) GeneralScope
a) The examination shall be conducted using automated or semi-automated techniques utilizing computer based data acquisition
b) The examination shall be performed in accordance with a written procedure approved by a Level III and conforming to the requirements of ASME Section V Article 4 Mandatory Appendix VIII and i) For Phased Array ndash ASME Section
V Article 4 Mandatory Appendix V
ii) For Time of Flight Diffraction (TOFD) - ASME Section V Article 4 Mandatory Appendix III
c) Procedure qualification shall meet the requirements of ASME Section V Article 4 Mandatory Appendix IX
2) Equipment A mechanical guided scanner capable of maintaining a fixed and consistent search unit position relative to the weld centerline shall be used
3) Personnel a) Set-up and scanning of welds shall be
performed by personnel certified as Level II or III (or by Level I personnel under the direct supervision of Level II personnel)
b) Interpretation and evaluation of data shall be performed by Level II or III personnel
c) Examination personnel shall be qualified and certified following a procedure or program as described in ASME BPV Code Section V Article 1 T-120 (e) (f) (h) and (i)
d) Personnel demonstration requirements shall be as stated in ASME Section V Article 4 Mandatory Appendix VII
4) Examination a) The initial straight beam scan for
reflectors that could interfere with the angle beam examination shall be performed (a) manually (b) as part of a previous manufacturing process or (c) during the weld examination provided detection of these reflectors is included in the demonstration as required in 1(c) above
b) The examination area shall include the volume of the weld plus the lesser of 25mm (10 in) or t of adjacent base metal Alternatively the examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6mm (025 in) of base material beyond the heat affected zone on each side of the weld provided the extent of the weld HAZ is measured and documented
c) Scanning may be peformed at reference level provided the procedure qualification was performed at reference level
5) Data Recording Data shall be recorded in the unprocessed form with no thresholding The data record shall include the complete examination area as specified in (4)(b) above
1 For wall thicknesses less than 25mm (10 in) the acceptance criteria stated in paragraph 34462 of B313 shall be used
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 178
2 Fa includes the longitudinal force due to pressure iAPtimes for piping systems that contain no
expansion joints where 42dAi times=π and d is the pipe inside diameter considering pipe wall thickness less allowances For piping systems with expansion joints it is the responsibility of the designer to determine the longitudinal force due to the pressure in the piping system
3 Z shall be based on the nominal section less the sum of the mechanical (thread or groove depth) corrosion and erosion allowances
4 It is the responsibility of the designer to determine Ii and Io in cases where these indices are based on stress intensification factors it is the responsibility of the designer to determine ii and io for all components not explicitly addressed in Appendix D (eg elbowsbendsmiters other than 90 degrees base-ells reducing elbows crosses etc)
B31 CASE 180
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 CASE 180 Leak Testing of Subassemblies of Jacketed Piping for use in ASME B313 Piping
Systems
Approval Date January 5 2007 Inquiry Does ASME B313 permit an alternate leak test for jacketed piping in which it is impracticable to visually examine the welded joints and connections for leaks in accordance with para 34522(a) Reply Visually observing the joints and connections during the leak test in accordance with para 34522(a) and 34531 is not required provided all of the following conditions are satisfied
1 The welded joints and connections are on the inner pipe of jacketed piping 2 A leak test is performed that otherwise meets the requirements of para 3451
except visual examination of joints and connection in accordance with para 34522(a) and 34531 is not required
3 A sensitive leak test is performed in accordance with para 3458 to demonstrate leak tightness of welded joints and connections that are not visually examined during the leak testing requirements in 2 above
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
Original Inquiry Under what conditions and limitations may alternative UT acceptance criteria apply in lieu of those described in para 34462 of ASME B313 When specified by the owner the ultrasonic examination acceptance criteria included below may be applied for welds in material greater than or equal to 25mm (10 in) in thickness1 in accordance with ASME B313 provided the following requirements are met 1) GeneralScope
a) The examination shall be conducted using automated or semi-automated techniques utilizing computer based data acquisition
b) The examination shall be performed in accordance with a written procedure approved by a Level III and conforming to the requirements of ASME Section V Article 4 Mandatory Appendix VIII and i) For Phased Array ndash ASME Section
V Article 4 Mandatory Appendix V
ii) For Time of Flight Diffraction (TOFD) - ASME Section V Article 4 Mandatory Appendix III
c) Procedure qualification shall meet the requirements of ASME Section V Article 4 Mandatory Appendix IX
2) Equipment A mechanical guided scanner capable of maintaining a fixed and consistent search unit position relative to the weld centerline shall be used
3) Personnel a) Set-up and scanning of welds shall be
performed by personnel certified as Level II or III (or by Level I personnel under the direct supervision of Level II personnel)
b) Interpretation and evaluation of data shall be performed by Level II or III personnel
c) Examination personnel shall be qualified and certified following a procedure or program as described in ASME BPV Code Section V Article 1 T-120 (e) (f) (h) and (i)
d) Personnel demonstration requirements shall be as stated in ASME Section V Article 4 Mandatory Appendix VII
4) Examination a) The initial straight beam scan for
reflectors that could interfere with the angle beam examination shall be performed (a) manually (b) as part of a previous manufacturing process or (c) during the weld examination provided detection of these reflectors is included in the demonstration as required in 1(c) above
b) The examination area shall include the volume of the weld plus the lesser of 25mm (10 in) or t of adjacent base metal Alternatively the examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6mm (025 in) of base material beyond the heat affected zone on each side of the weld provided the extent of the weld HAZ is measured and documented
c) Scanning may be peformed at reference level provided the procedure qualification was performed at reference level
5) Data Recording Data shall be recorded in the unprocessed form with no thresholding The data record shall include the complete examination area as specified in (4)(b) above
1 For wall thicknesses less than 25mm (10 in) the acceptance criteria stated in paragraph 34462 of B313 shall be used
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 180
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
B31 CASE 180 Leak Testing of Subassemblies of Jacketed Piping for use in ASME B313 Piping
Systems
Approval Date January 5 2007 Inquiry Does ASME B313 permit an alternate leak test for jacketed piping in which it is impracticable to visually examine the welded joints and connections for leaks in accordance with para 34522(a) Reply Visually observing the joints and connections during the leak test in accordance with para 34522(a) and 34531 is not required provided all of the following conditions are satisfied
1 The welded joints and connections are on the inner pipe of jacketed piping 2 A leak test is performed that otherwise meets the requirements of para 3451
except visual examination of joints and connection in accordance with para 34522(a) and 34531 is not required
3 A sensitive leak test is performed in accordance with para 3458 to demonstrate leak tightness of welded joints and connections that are not visually examined during the leak testing requirements in 2 above
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
Original Inquiry Under what conditions and limitations may alternative UT acceptance criteria apply in lieu of those described in para 34462 of ASME B313 When specified by the owner the ultrasonic examination acceptance criteria included below may be applied for welds in material greater than or equal to 25mm (10 in) in thickness1 in accordance with ASME B313 provided the following requirements are met 1) GeneralScope
a) The examination shall be conducted using automated or semi-automated techniques utilizing computer based data acquisition
b) The examination shall be performed in accordance with a written procedure approved by a Level III and conforming to the requirements of ASME Section V Article 4 Mandatory Appendix VIII and i) For Phased Array ndash ASME Section
V Article 4 Mandatory Appendix V
ii) For Time of Flight Diffraction (TOFD) - ASME Section V Article 4 Mandatory Appendix III
c) Procedure qualification shall meet the requirements of ASME Section V Article 4 Mandatory Appendix IX
2) Equipment A mechanical guided scanner capable of maintaining a fixed and consistent search unit position relative to the weld centerline shall be used
3) Personnel a) Set-up and scanning of welds shall be
performed by personnel certified as Level II or III (or by Level I personnel under the direct supervision of Level II personnel)
b) Interpretation and evaluation of data shall be performed by Level II or III personnel
c) Examination personnel shall be qualified and certified following a procedure or program as described in ASME BPV Code Section V Article 1 T-120 (e) (f) (h) and (i)
d) Personnel demonstration requirements shall be as stated in ASME Section V Article 4 Mandatory Appendix VII
4) Examination a) The initial straight beam scan for
reflectors that could interfere with the angle beam examination shall be performed (a) manually (b) as part of a previous manufacturing process or (c) during the weld examination provided detection of these reflectors is included in the demonstration as required in 1(c) above
b) The examination area shall include the volume of the weld plus the lesser of 25mm (10 in) or t of adjacent base metal Alternatively the examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6mm (025 in) of base material beyond the heat affected zone on each side of the weld provided the extent of the weld HAZ is measured and documented
c) Scanning may be peformed at reference level provided the procedure qualification was performed at reference level
5) Data Recording Data shall be recorded in the unprocessed form with no thresholding The data record shall include the complete examination area as specified in (4)(b) above
1 For wall thicknesses less than 25mm (10 in) the acceptance criteria stated in paragraph 34462 of B313 shall be used
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
Original Inquiry Under what conditions and limitations may alternative UT acceptance criteria apply in lieu of those described in para 34462 of ASME B313 When specified by the owner the ultrasonic examination acceptance criteria included below may be applied for welds in material greater than or equal to 25mm (10 in) in thickness1 in accordance with ASME B313 provided the following requirements are met 1) GeneralScope
a) The examination shall be conducted using automated or semi-automated techniques utilizing computer based data acquisition
b) The examination shall be performed in accordance with a written procedure approved by a Level III and conforming to the requirements of ASME Section V Article 4 Mandatory Appendix VIII and i) For Phased Array ndash ASME Section
V Article 4 Mandatory Appendix V
ii) For Time of Flight Diffraction (TOFD) - ASME Section V Article 4 Mandatory Appendix III
c) Procedure qualification shall meet the requirements of ASME Section V Article 4 Mandatory Appendix IX
2) Equipment A mechanical guided scanner capable of maintaining a fixed and consistent search unit position relative to the weld centerline shall be used
3) Personnel a) Set-up and scanning of welds shall be
performed by personnel certified as Level II or III (or by Level I personnel under the direct supervision of Level II personnel)
b) Interpretation and evaluation of data shall be performed by Level II or III personnel
c) Examination personnel shall be qualified and certified following a procedure or program as described in ASME BPV Code Section V Article 1 T-120 (e) (f) (h) and (i)
d) Personnel demonstration requirements shall be as stated in ASME Section V Article 4 Mandatory Appendix VII
4) Examination a) The initial straight beam scan for
reflectors that could interfere with the angle beam examination shall be performed (a) manually (b) as part of a previous manufacturing process or (c) during the weld examination provided detection of these reflectors is included in the demonstration as required in 1(c) above
b) The examination area shall include the volume of the weld plus the lesser of 25mm (10 in) or t of adjacent base metal Alternatively the examination volume may be reduced to include the actual heat affected zone (HAZ) plus 6mm (025 in) of base material beyond the heat affected zone on each side of the weld provided the extent of the weld HAZ is measured and documented
c) Scanning may be peformed at reference level provided the procedure qualification was performed at reference level
5) Data Recording Data shall be recorded in the unprocessed form with no thresholding The data record shall include the complete examination area as specified in (4)(b) above
1 For wall thicknesses less than 25mm (10 in) the acceptance criteria stated in paragraph 34462 of B313 shall be used
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
6) Data Analysis
a) Reflectors exceeding the limits below shall be investigated to determine whether the indication originates from a flaw or is a geometric indication in accordance with 6(b) below i) For amplitude based techniques the
location amplitude and extent of all reflectors that produce a response greater than 20 of the reference level shall be investigated
ii) For non-amplitude based techniques the location and extent of all images that have an indicated length greater than 40mm (016 in) shall be investigated
b) Ultrasonic indications of geometric andor metallurgical origin shall be classified as specified in ASME Section V Article 4 Paragraph T-481
c) Alternatively other techniques or NDE methods may be used to classify an indication as geometric (eg alternative beam angles radiography) The method employed is for information only to classify the indication as geometric and ASME B313 requirements for examination techniques are only required to the extent they are applicable
7) Flaw Evaluation a) The dimension of the flaw(s) shall be
determined by the rectangle that fully contains the area of the flaw(s) (Refer to Fig 1) i) The length ℓ of the flaw shall be
drawn parallel to the inside pressure retaining surface of the component
ii) The height h of the flaw shall be drawn normal to the inside pressure retaining surface of the component
iii) The flaw shall be characterized as a surface or subsurface flaw as shown in Figure 1
iv) A subsurface indication shall be considered as a surface flaw if the separation (S in Figure 1) of the indication from the nearest surface of the component is equal to or less than half the through wall
dimension (h in Figure 1 sketch [b]) of the subsurface indication
b) Multiple Flaws i) Discontinuous flaws that are
oriented primarily in parallel planes shall be considered to lie in a single plane if the distance between the adjacent planes is equal to or less than 13mm (050 in) or 05t whichever is less
ii) If the space between two flaws aligned along the axis of weld is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
iii) If the space between two flaws aligned in the through-thickness dimension is less than the height of the flaw of greater height the two flaws shall be considered a single flaw
8) Flaw Acceptance Criteria Flaws shall be evaluated against the applicable acceptance criteria of Table 1 or 2 except that flaw length (l) shall not exceed 4t regardless of flaw height (h) or the calculated aspect ratio
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
TABLE 1
Acceptance Criteria for Surface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0031 lt 0019 005 lt 0033 lt 0020 010 lt 0036 lt 0022 015 lt 0041 lt 0025 020 lt 0047 lt 0028 025 lt 0055 lt 0033 030 lt 0064 lt 0038 035 lt 0074 lt 0044 040 lt 0083 lt 0050 045 lt 0085 lt 0051 050 lt 0087 lt 0052
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
TABLE 2 Acceptance Criteria for Subsurface Flaws
Aspect Ratio hℓ
Weld Thickness 25mm to 64mm
(10 in to 25 in) 100mm to 300mm (39 in to 118 in)
ht ht000 lt 0068 lt 0040 010 lt 0076 lt 0044 020 lt 0086 lt 0050 030 lt 0098 lt 0058 040 lt 0114 lt 0066 050 lt 0132 lt 0076 060 lt 0156 lt 0088 070 lt 0180 lt 0102 080 lt 0210 lt 0116 090 lt 0246 lt 0134 100 lt 0286 lt 0152
General Notes (a) t = thickness of the weld excluding any allowable reinforcement For a
butt joint joining two members having different thickness at the joint t is the thinner of the two thicknesses joined If a full penetration weld
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 Case 181‐2 (Approval Date January 4 2012) Use of Alternative Ultrasonic Examination Acceptance Criteria in ASME B313
includes a fillet weld the effective throat dimension of the fillet weld shall be included in t
(b) Aspect Ratio (hℓ) used may be determined by rounding the calculated hℓ down to the nearest 005 increment value within the column or by linear interpolation
(c) For intermediate thickness t (weld thicknesses between 64mm and 100mm [25 in and 39 in]) linear interpolation is required to obtain ht values
Figure 1 Surface and Subsurface Indications
h h
h
S gt 05h
S lt 05h
(c) Subsurface Flaw
(a) Surface Flaw (b) Surface Flaw
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
ASME B313 CASES B31 CASE 184 Use of Ultrasonic Examination of Welds as an Alternative to Radiographic Examination in ASME B313 Chapter IX Approval Date 10292009 This Case shall expire upon the publication of ASME B313ndash2010 Edition Inquiry Under what conditions and limitations may ultrasonic examination of welds be used as an alternative to radiographic examination for ASME B313ndash2008 Edition Chapter IX piping systems Reply It is the opinion of the Committee that ultrasonic examination of welds may be used as an alternative to the radiographic examination specified in ASME B313ndash2008 Edition for Chapter IX piping systems provided that the requirements specified in paras K34142 and K342 and Table K34132 be modified as follows and that the requirements of a new para K34463 shown below be met K34142 Radiographic and Ultrasonic Examination
(a) All girth longitudinal and branch connection welds shall be 100 radiographically examined except as permitted in (b) below
(b) When specified in the engineering design and with the ownerrsquos approval ultrasonic examination of welds may be substituted for radiographic examination where Ťw ge 13 mm (frac12 in)
(c) In-process examination (see para 3447) shall not be substituted for radiographic or ultrasonic examination of welds NOTE Ťw = Twbar K342 EXAMINATION PERSONNEL
Paragraph 342 applies except that personnel performing and evaluating results of ultrasonic examination of welds shall be qualified and certified UT Level II or III in accordance with ASNT SNT-TC-1A ACCP (ASNT Central Certification Program) or CP-189 (Qualification and Certification of Nondestructive Testing Personnel) Qualification of these personnel shall also be by written examination
K34463 Welds The method for ultrasonic examination of welds shall be as specified in the ASME BPV Code Section V Article 4 and Section VIII Division 3 KE-301 and KE-302 except that
(a) Performance demonstration shall be required (b) The employerrsquos written practice for UT personnel qualification shall meet ASNT SNT-TC-1A
ACCP or CP-189 The recommended guidelines in SNT-TC-1A ACCP or CP-189 shall be required (c) Written procedure in accordance with Section V T-4211 shall be required (d) Procedure qualification in accordance with Section V T-4211 shall be required
REVISED TABLE K34132 See Page 2
CASES OF THE CODE FOR PRESSURE PIPING - B31
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
(08)
ASME B313-2008
Table K34132 Acceptance Criteria for Welds
Criteria (A-E) for Types of Welds and for RequiredExamination Methods [Note (I)]
Type of WeldMethods
Longitudinal BranchType of Ultrasonics or Girth Groove Fillet Connection
Imperfection Visual Radiography Groove [Note (2)] [Note (3)] [Note (4)]
Crack X X A A A Alack of fusion X X A A A AIncomplete penetration X X A A A AInternal porosity X B B NA BSlag inclusion or elongated indication X C C NA CUndercutting X X A A A ASurface porosity or exposed slag inclusion X A A A AConcave root surface (suck-up) X X D D NA DSurface finish X E E E EReinforcement or internal protrusion X F F F F
GENERAL NOTE X = required examination NA = not applicable = not required
Criterion Value Notes for Table K34132
Criterion
Symbol
A
Measure
Extent of imperfection
Acceptable Value Limits [Note (5)]
Zero (no evident imperfection)
B Size and distribution of internal porosity See BPV Code Section VIII Division I Appendix 4
C Slag inclusion or elongated indication Indications are unacceptable if the amplitude exceeds the referencelevel or indications have lengths that exceed
Individual length t lt 19 mm (Yo in) 19 rom ( in) lt 157 mm (2~ in) t gt 57 mrn (2Y in)6mrn~~ ~~~~
Cumulative length ~ t in any 12 t weld length
D Depth of surface concavity Wall Thickness Depth of Surface ConcavityTwo mm (in) mm (in)
S 13 () $ 15 e1t6)gt 13 CV2) and $ 51 (2) ~ 3 (Va)gt 51 (2) $ 4 (2)
and total joint thickness including weld reinforcementZ Tw
E Su rface rough ness $ 125 fLm (500 fLin) Ra (see ASME B461 for definition ofroughness average Ra )
F Height of reinforcement or internal protrusion [Note (6)]in any plane through the weld shall be within thelimits of the applicable height value in the tabulashytion at the right Weld metal shall be fused with andmerge smoothly into the component surfaces
Wall ThicknessTw mm (in)
$13 eh)gt 13 () and $ 51 (2)gt 51 (2)
External Weld Reinforcementor Internal Weld Protrusion
mm (in)
$ 15 e1t6)~ 3 (Va)$4 Wd
NOTES(1) Criteria given are for required examination More stringent criteria may be specified in the engineering design(2) longitudinal welds include only those permitted in paras K30234 and K305 The radiographic criteria shall be met by all welds
including those made in accordance with a standard listed in Table K3261 or in Appendix K(3) Fillet welds include only those permitted in para K31122(4) Branch connection welds include only those permitted in para K32854(5) Where two limiting values are given the lesser measured value governs acceptance Tw is the nominal wall thickness of the thinner of
two components joined by a butt weld(6) For groove welds height is the lesser of the measurements made from the surfaces of the adjacent components For fillet welds
height is measured from the theoretical throat internal protrusion does not apply Required thickness tm shall not include reinforceshyment or internal protrusion
132
Copyright copy 2008 by the American Society of Mechanical Engineers ~
No reproduction may be made ofthis material without written consent of ASME ~
CASES OF THE CODE FOR PRESSURE PIPING - B31
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 1 of 2
ASME B313 CODE CASE 185
Title Use of Standard Helium Leak Test for a Vacuum-only Piping System (Paragraph 345)
Approval Date December 22 2009
Inquiry
Under what circumstances does ASME B313 permit the use of helium mass spectrometer leaktests performed under a vacuum as a substitute for the leak test requirements specified in ASMEB313 para 345
Reply
In the opinion of the Committee the qualified helium leak tests under vacuum conditions in theASME BPV Code Section V Article 10 Appendix V and Appendix IX are acceptablesubstitutes for the testing requirements identified in para 345 of ASME B313 provided thefollowing conditions are met
1 The piping system is expected to operate only under vacuum (ie sub-atmospheric pressure)conditions
2 Any leakage into the piping system that could result in an internal reaction (eg combustionor explosion) that increases the pressure above atmospheric shall be prevented
3 All system joints and connections shall be leak tested Piping welds and joints to be testedshall be uninsulated and exposed and shall not be primed painted or otherwise coated
4 Helium leak testing is performed at vacuum conditions sufficient for the mass spectrometerhelium leak tests of ASME BPV Code Section V Article 10 Appendices V and IX or atpressures below 10 millibars absolute (lt1 of atmospheric pressure) whichever is lower
5 ASME B313 para 3452 applies except for the minimum ldquo10 minrdquo leak test period theleak test pressure requirements and the limitation of the need for access for jacketed piping toldquovisual accessrdquo Para 3453 also applies except for the leak test pressure requirements Allother inspection examination and records requirements of ASME B313 Chapter VI muststill be satisfied (ie paras 340 341 342 343 344 and 346)
6 Written procedures shall be qualified in accordance with BPV Code Section V Article 10
7 Test personnel shall have training and certification consistent with ASME B313 para 342
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 185
CASES OF THE CODE FOR PRESSURE PIPING ndash B31
Page 2 of 2
8 Test reports including records of personnel qualifications shall meet the requirements ofASME BPV Code Section V Article 10 Item T-1091 and shall be retained for at least fiveyears
9 Options of the ASME BPV Code Section V Article 10 test methods which allow theengineering design to modify specified requirements of the Appendix V and Appendix IXtest methods (such as acceptability limits for system leak tightness) may only be exercisedso as to make these requirements more sensitive or more conservative
10 The use of the vacuum leak test instead of the pressurized leak test of ASME B313para 345 shall be specified in the engineering design and shall be accepted by the Owner
____________________________________________________________________
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 CASE 188
Minimum Hydrostatic Test Pressure for ASME B313 Chapter IX (Para K34542)
ANNULLED
Annulment Date February 27 2015
Reason Requirements incorporated in ASME B313 Code
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
B31 Code Case 191 Cu-13Zn-11Ni-Si-Al Alloy Seamless Pipe and Tube ASME B313 Approval Date January 21 2015
Inquiry May precipitation-hardened (Temper Designation TF00) Cu-13Zn-11Ni-Si-Al alloy (UNS No C69100) seamless pipe and tube conforming to the requirements of ASTM B706-00 (R2011) be used under the rules of ASME B313
Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in
Table 1
(b) Welded and brazed construction is not permitted (c) The maximum use temperature shall be 204ordmC (400ordmF)
(d) Certification to the ASTM B706-00 (R2011) specification requirements shall be
mandatory
Table 1
Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100
150
200
250
300
350
400
200 200 200 200 200 199 195
40
65
100
125
150
175
200
225
138 138
138
138
138
137
135
132
Note The maximum use temperature for this alloy is 204ordmC (400ordmF) The value listed at 225ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
Case 193 Approval Date October 9 2014 Cu-55Zn-4Si Casting Alloy UNS No C87600 ASME B313 Inquiry May Cu-55Zn-4Si Casting Alloy UNS No C87600 conforming to the requirements of ASTM B584 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The basic allowable stress values for the material shall be those given in Table 1 A Casting Quality Factor Ec needs to be applied
(b) The maximum use temperature shall be 177ordmC (350ordmF) (c) Separate weld procedure and performance qualifications shall apply to this
material The welding procedure qualifications shall be in accordance with ASME Section IX
Table 1 Basic Allowable Stress Values
For Metal Temperature Not Exceeding degF
Stress ksi
For Metal Temperature Not Exceeding degC
Stress MPa
100 200 40 138 150 200 65 138200 200 100 138250 200 125 138300 200 150 138350 200 175 138
200 137
Note The maximum use temperature for this alloy is 177ordmC (350ordmF) The value listed at 200ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only
Case 196 Approval Date May 15 2015 Ductile Iron Casting UNS No F33100 ASME B313 Inquiry May Ductile Iron Castings UNS No F33100 conforming to the requirements of ASTM A536 Grade 65-45-12 be used for construction under the rules of ASME B313 Reply Yes provided
(a) The maximum allowable stress values for the material shall be those given in Table 1
(b) A casting quality factor Ec of 080 shall also be applied except as permitted in (c)
(c) The casting quality factor may be increased by performing supplementary examination(s) listed in Table 30233(c) The casting shall have first been visually examined as required by MSS SP-55 Quality Standard for Steel Castings for Valves Flanges and Fittings and other Piping Components ndash Visual Method
(d) The maximum use temperature shall be 260ordmC (500degF) (e) The minimum use temperature shall be -30degC (-20degF) (f) All other requirements of ASME B313 shall be followed
Table 1 ndash Maximum Allowable Stress Values
For Metal Temperature Not Exceeding degC
Stress MPa
For Metal Temperature Not Exceeding degF Stress ksi
40 149 100 217 65 149 150 217
100 149 200 217 125 149 250 217 150 149 300 217 175 149 350 217 200 148 400 217 225 148 450 217 250 148 500 216 275 147
Note The maximum use temperature for this alloy is 260ordmC (500ordmF) The value listed at 275ordmC is provided for interpolation purposes only