asme ix interpretation-part2

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Standard Designation: BPV Section IX

Edition/Addenda:

Para./Fig./Table No:

Subject Description: Section IX, QW-462.2(a) Removal of Backing Ring for Side Bend Tests

Date Issued: 06/27/1979

Record Number: BC-79-315

Interpretation Number : IX-79-50

Question(s) and Reply(ies): Question: Is it acceptable to remove weld reinforcement, backing strip or

backing ring flush with the undisturbed surface of the base material before

performing a side bend test?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, SMAW Procedure Qualifications




Question(s) and Reply(ies): Question: Is DC straight (electrode negative) polarity permitted by Section

IX for procedure qualifications using E7018 (SFA 5.1) electrodes?

Reply: Yes, straight polarity is permitted. Section IX places no limits upon

polarity for SMAW procedure qualifications other than those imposed by

QW-409.1 (Supplementary Essential Variables) and QW-409.8

(Nonessential Variables).

Standard Designation: BPV Section IXEdition/Addenda:


Subject Description: Section IX, Semi-Automatic and Automatic Welding




Question(s) and Reply(ies): Question: Are separate performance qualifications required for one person,

acting as both welder and welding operator, using the same process within

the same essential variables?

Reply: Yes.

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Question: Must the performance qualifications for welders and welding

operators be maintained and renewed separately?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, QW-407.1, PWHT of Weld Procedure




Question(s) and Reply(ies): Question (1): What is meant by the term "range" as it appears in the

wording for PWHT in QW-407.1?

Reply (1): The Code does not address itself to specifying a postweld heat

treatment temperature range. It would be the responsibility of the

manufacturer or fabricator to develop a temperature range suitable for the

material used and designated in the Welding Procedure Specification. It is

hoped that a postweld heat treatment temperature would be selected to fall

midway in the range developed.

Question (2): How much may the temperature of PWHT of WPS

qualification coupons differ from the PWHT temperature of the vessel?

Reply (2): There is no connection between the PWHT of welded test

coupons and the PWHT requirements of a vessel. The values may be

similar, but are not required to be so by Code requirements.

ATTENTION

The foregoing interpretation has been further considered and the following

corrected interpretation to Question (2) sent to the inquirer.

Corrected Issued: September 25, 1979

Question (2): How much may the temperature of PWHT of WPS

qualification coupons differ from the PWHT temperature of the vessel?

Reply (2): The PWHT of the welded test coupons and the PWHT of the

vessel must be of the same type of PWHT as designated for the variousconditions outlined in QW-407.1


Edition/Addenda:


Subject Description: Section IX, Performance Qualification for Small Diameter Tubing, QW-

452.3


Record Number: BC-78-634Interpretation Number : IX-78-103

Question(s) and Reply(ies):

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Question: "1 in. diameter" tubing may vary (per SA-450) between 0.968

and 1.016 in. in diameter. Under the diameter limitations in QW-452.3, is a

welder qualified on a "2 in." (nominal) pipe qualified to weld the "1 in.

diameter" tube described above?

Reply: No. QW-452.3 is based on nominal pipe sizes for specimen sizes

and qualification limits, the "over 1" minimum qualified outside diameter

keyed to ¾ in. pipe size. SA-53 gives the following O.D. tolerances for ¾in. pipe:

O.D.: 1.050 in. O.D. min : 1.050 - 1/32 in. (i.e. 1.019 in.) O.D. max : 1.050

+ 1/64 in. (i.e. 1.066 in.)

The 1 in. tube in question, varying between 0.968 and 1.016 in. O.D., would

not be weldable under the conditions in question.


Edition/Addenda:


Subject Description: Section IX, QW-403.16, Diameter Restrictions




Question(s) and Reply(ies): Question: Do the diameter restrictions of Section IX, QW-403.16 mandate

requalification of welders for fillet and socket welds in pipe 2f in. nominal

diameter and less when the welders have been qualified in large diameter

groove welds in pipe?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, 1974 Edition, QW-403.6




Question(s) and Reply(ies): Question: If the thickness of the test plate or pipe is more than 5/8 in. and

QW-403.6 is specified as a Supplementary Essential Variable, what is the

minimum thickness qualified?

Reply: When QW-403.6 is required as a Supplementary Essential Variable

for notch toughness, the minimum thickness qualified when the test plate or

pipe is greater than 5/8 in. is 5/8 in. The minimum thickness specified in

QW-451 is the minimum thickness qualified, except when QW-403.6 is

listed as a Supplementary Essential Variable.



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Subject Description: Section IX, QW-422, A-Numbers vs. AWS Requirements




Question(s) and Reply(ies): Question: Prior to the Winter 1976 Addenda of Section IX, the E8018-C3

electrodes met the A-No. 12 category of QW-442. What is the A-Number

category for this electrode in the revised QW-442 A-Numbers?

Reply: All E8018-C3 electrodes now meet the requirements for A-No. 10 in

QW-442. This was also true in 1976.


Edition/Addenda:


Subject Description: Section IX, QW-201.1 and QW-201.2

Date Issued: 07/05/1978Record Number: BC-78-404


Question(s) and Reply(ies): Question (1): Is it the intent of QW-201.1 to list on the Welding Procedure

Specification each essential and nonessential variable required for each

process whether the variable is applicable for that particular process or not?

Reply (1): It is the intent of QW-201.1 as stated: "The WPS information

may be presented in any form, written or tabular, to fit the needs of each

manufacturer or contractor as long as every essential and nonessential

variable required of the appropriate welding process or processes (QW-252

through QW-281) is included."

Question (2): Do the requirements of QW-201.2 on the Procedure

Qualification Record require a similar enumeration?

Reply (2): The requirements of QW-201.2 call for the Procedure

Qualification Record to document the essential variables of the applicable

process or processes required by QW-252 through QW-281.


Edition/Addenda:


Subject Description: Section IX, QW-305




Question(s) and Reply(ies): Question: Is it the intent of the Code, QW-305, that if a man qualifies using

a semi-automatic process (submerged arc), is he also qualified using

automatic submerged arc where the arc is positioned via a fully motorized

manipulator?

Reply: It is the intent of the Code that welding operators would be governed

by the requirements of QW-305 which would cover all automatic processes.

Semi-automatic submerged arc process, which would be performed by a

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welder, would need to comply with the requirements of QW-304 and QW-

354.


Edition/Addenda:


Subject Description: Section IX, Summer Addenda, QW-202.2




Question(s) and Reply(ies): Question (1): Is there a limit on the minimum depth of deposited metal for

repair or build-up welding? Does this override the minimum limits listed in

Table QW-451.1?

Reply (1): If you limit the weld layers to ½ in. or less in thickness, then the

minimum limits of QW-451.1 are overridden as far as weld metal thickness

is concerned. New work has been done on QW-451.1 which will help

clarify this item.

Question (2): Does qualification on test plates/material less than 3 in. thick

allow repair and build-up welding on base material of thickness up to 2t,

with a depth of deposited metal being limited to a maximum of 2t?

Reply (2): Yes.

Question (3): Does qualification on test plates/material 3 in. thick or greater

allow repair and build-up welding on base material of any thickness, the

depth of the deposited metal is limited to a maximum of 2t?

Reply (3): Yes.

Question (4): Is it permissible to perform repairs deeper than 6 in. using for

qualification plate with a thickness of at least one-half the depth of the

repair?

Reply (4): Yes.

Question (5): Is it correct to assume that the thickness of the material being

repaired refers to the location where the repair is being made?

Reply (5): Yes.


Edition/Addenda:


Subject Description: Section IX, QB-402.1 and QB-402.2 Material Qualification




Question(s) and Reply(ies): Question: QB-402.1 and QB-402.2 are Essential Variables for procedure

and performance qualification, respectively, which indicate that a change

from a base metal listed under one P-Number in QB-422 to a base metal

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listed under another P-Number or to any other base metal require

requalification. Can a procedure which is qualified using ASME SB-12

Alloy 122 be used for the brazing of ASME SB-42 Alloy 122 (P-No. 107)

material? Can a procedure which is qualified with ASME SB-466 Alloy 706

(similar to P-No. 107 material, SB-111 Alloy 706) be used to qualify a

brazing procedure for joining SB-12 Alloy 122 (similar to P-No. 107

material, SB-42 Alloy 122)?

Reply: The answer to both questions presented is in the affirmative that

qualification with Alloy 122 or Alloy 706, both included in P-No. 107, will

qualify all other product forms of that same alloy. The Committee

recognizes that the P-Number tables of the Brazing Section of Section IX

need revision and updating to cover the other product forms for alloys now

listed. The precedent of permitting other product forms of similar chemistry

materials has been well established in all the book sections of the Code in

their General Requirements paragraphs on materials.


Edition/Addenda:


Subject Description: Section IX, QW-201.3




Question(s) and Reply(ies): Question: Is it acceptable to delete a GMAW root pass (using E70T-1 wire)

which was initially in a qualified combination procedure with SAW

remainder using a F 72-EM12K flux/filler (base material is P-No. 1, Group

2), and add an SMAW root pass using E7018 electrode, withoutrequalification, provided that the SMAW procedure is qualified within the

thickness range for that process?

Reply: It is the intent of QW-201.3 to allow the deletion of a GMAW

process which was previously qualified in combination with one or more

other processes and to add an SMAW process without requalification

providing the SMAW process has been qualified within the thickness limits

specified in QW-202.2, QW-403, and QW-451.


Edition/Addenda:Para./Fig./Table No:

Subject Description: Section IX, QW-462.1(a)




Question(s) and Reply(ies): Question (1): Referring to QW-462.1(a), may the specified widths of the

reduced section tensile specimens be reduced as follows?

Plate Thickness Present Widths Proposed Width

1 in. or less 1-1/2 in. approx., 1 in. min. 1/2 in. min. Over 1 in. 1 in. min.

3/8 in. min.

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The reason for this inquiry is that the present minimum sizes impose a very

high load requirement on tensile testing equipment. The proposed reduction

would still test significantly more weld cross-sectional area than that tested

by the turned 0.505 in. diameter specimens [QW-461.2(d)], which are also

permitted for procedure qualification tensile testing, and which are more

expensive to prepare.

Reply (1): The widths of the reduced section tensile specimens shall be asspecified in QW-462.1(a). However, your attention is called to QW-141.1,

which permits the mechanical cutting of a single specimen into a number of

approximately equal pieces to accommodate the available testing

equipment. If this provision will not permit specimens which can be tested

within the capabilities of the testing equipment, the specimen of QW-461.2

(d) is to be employed in accordance with the instructions of QW-151.3. The

speci-mens contained in QW-462 are standard specimens used throughout

the welding industry in the various specifications controlling qualification

in which tensile testing is required.

Question (2): Referring to QW-462.1(a), may the specified thickness of

reduced specimens be reduced by a maximum of 10% of the platethickness? (This is in addition to grinding the reinforcement flush.)

Reply (2): The Code does not specify any maximum reduction in the

thickness. The minimum amount of material needed to produce parallel

surfaces shall be removed from the test specimen. Figure QW-462.1(a) was

revised in the Summer 1978 Addenda to Section IX recognizing that a test

specimen will distort during welding. Cold straining is permitted prior to

the removal of the weld reinforcement. These revisions were made to

clarify the intent of the Committee.



Subject Description: Section IX, QW-302.3 and QW-452.3




Question(s) and Reply(ies): Question (1): QW-302.1 requires that the type and number of specimens for

performance qualification to be in accordance with QW-452. QW-452.3

specifies two bend tests for each performance qualification. However, QW-302.3 requires four specimens from pipe in positions 5G or 6G of QW-

461.3 removed in accordance with the sequence of QW-463.2(d) or (e).

What are the proper requirements: the two bend tests of QW-452.3 or the

four bend tests required by QW-302.3?

Reply (1): The four bend tests required by QW-302.3 are correct. The

Summer 1978 Addenda of Section IX has revised QW-452.3 to correct this

inconsistency.

Question (2): QW-452.3 of Section IX specifies that a welder must weld a

performance qualification coupon with a thickness of 3/4 in. and over to

have an unlimited maximum thickness qualification. SA-106 has a

minimum thickness of 0.656 in. for a nominal thickness of 0.75 in. Can a

performance qualification specimen that is greater than 0.656 in. but less

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than 0.75 in. thick be used to qualify a welder for an unlimited maximum

thickness?

Reply (2): No. The thickness of the performance qualification must be 3/4

in. (0.750 in.) or over for an unlimited qualification.



Subject Description: Section IX, Performance Qualification on Combination Welding




Question(s) and Reply(ies): Question (1): If a welder makes a combination performance qualification

test weld using GTAW and SMAW on 0.75 wall pipe, can he make

production welds in combination to unlimited thickness?

Reply (1): The welder does not have unlimited thickness qualification. He is

limited to the sum of the thickness qualified by each welding process in the

performance qualification test weld as listed in QW-452.

Question (2): If a welder makes a combination test weld with GTAW and

SMAW on 0.500 wall pipe, what is the maximum wall thickness he can

weld in combination if we assume 3/16 in. of GTAW is deposited in both

the test weld and the production weld while the remaining 5/16 in. is

deposited with SMAW?

Reply (2): Since the inquiry has restricted the GTAW to 3/16 in. for both

the test weld and the production weld, the only variable shall be the amountdeposited by the SMAW. The maximum amount that can be deposited by

the SMAW process in addition to the 3/16 in. of the GTAW is 5/8 in. by the

SMAW process.

Question (3): When a welder is tested in combination, is it required to

measure the actual thickness of the GTAW weld deposit with a depth gage?

Reply (3): The method of measurement of the actual thickness of the

GTAW weld deposit is left to the stamp holder. The Code does not specify

the actual method of measurement.


Edition/Addenda:






Question(s) and Reply(ies): Question (1): Under the requirements of QW-214.1, is the test plate

thickness for production base metal greater than 1 in. required to be at least1 in. thickness?

Reply (1): Yes.

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Question (2): Under the requirements of QW-214.1, is the test plate

thickness for production base metal less than 1 in. required to be a thickness

that is as thick as the production base metal (with the understanding that a

thickness less than the production base metal is also acceptable)?

Reply (2): The intent of QW-214.1 is that qualification for production base

metal less than 1 in. thick must be done on test metal which is equal to or

less than the thickness of the production base metal.

Question (3): May Corrosion Resistant Overlay Clad procedures (WPS) that

have been qualified in accordance with Section VIII, UCL-43 (1977

Edition) on ¼ in. or thicker plate be used for all production base metal

thickness providing the existing WPS meets all of the essential variables of

QW-281.2 through QW-281.4?

Reply (3): The production base metal thickness shall be qualified as listed

in QW-214.1.

Standard Designation:BPV Section IX

Edition/Addenda:


Subject Description: Section IX, Electrodes and Flash Butt Welding




Question(s) and Reply(ies): Question (1): In applying the requirements of QW-404.4 and QW-404.5 to

electrodes which are not produced in accordance with AWS/SFA

requirements, must requalification be made for each lot or heat item number

of a particular proprietary type of electrode?

Reply (1): Qualification with a proprietary type of electrode which is not in

accordance with an AWS/SFA specification shall qualify those electrodes

as long as the electrodes continue to meet the proprietary requirements for

that particular electrode; that is, proprietary specifications covering

chemistry and strength of the electrode. It is not necessary to requalify new

heats of such new electrodes when they meet the requirements of

proprietary specification. The chemistry and strength of that specification

should be identified in the Welding Procedure Specification by actual

values or references to the appropriate proprietary specification.

Question (2): Since flash butt welding is permitted under the rules of ASMEBoiler and Pressure Vessel Code Section I, why does Section IX not cover

qualification of procedures and operators even though referenced in Section

I for such requirements?

Reply (2): Section IX has not covered some of the automatic welding

processes such as flash butt welding, but the Code has accepted the use of

this welding method when the procedure has been tested to meet the

requirements of QW-451 for a number of specimens and the requirements

of QW-305 for qualification of the operators.


Edition/Addenda:


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Subject Description: Section IX, QW-403.5, QW-406.3, QW-409.1, and QW-410.24




Question(s) and Reply(ies): Question (1): In interpreting QW-403.5, must the Welding Procedure

Specification state the group number or the type and grade of material whenthe base metals have specified impact test requirements for the flux cored

arc welding process?

Reply (1): QW-403.5 is a Supplementary Essential Variable for the flux

cored arc welding process and becomes an Essential Variable when notch

toughness testing of the base metals is required by the Section of the Code

to which the vessel is being fabricated. If the Welding Procedure

Specification is to be employed under these conditions, it must state the

P-Number and group number of materials to which the welding procedure

can be applied and which procedure qualification records of the procedure

qualification test will substantiate. QW-403.5 and its other applicable

paragraphs under QW-403 must all be considered as applied to the welding process. QW-403.5 does not conflict with the other specified QW-403

paragraphs but supplements them when notch toughness is a factor.

Question (2): QW-406.3 indicates that an increase in the specified

maximum interpass temperature is cause for requalification of the

procedure. Must the Welding Procedure Specification and the procedure

qualification record list the maximum interpass temperatures, and who

specifies the maximum interpass temperature?

Reply (2): QW-406.3 is a Supplementary Essential Variable where notch

toughness is required by the Section of the Code to which the vessel is

being fabricated. The maximum interpass temperature shall be specified bythe stamp holder and shall be included in both the Welding Procedure

Specification and the procedure qualification record. This shall be the

temperature observed and attained as maximum interpass temperature

during the welding of the welding procedure qualification test coupons.

Question (3): In QW-409.1, are voltage ranges required in the WPS for

Shield Metal Arc welding when using a constant current welding machine,

and what are the maximum amperages and voltages qualified for the WPS?

Reply (3): QW-409.1 has been revised by committee action and will appear

in the Winter 1978 Addenda to Section IX. The essence of the change will

require that the stamp holder shall account for the heat input as measured by

either voltage, amperage, or an increase in weld metal deposited per unit

length beyond that qualified will require requalification. If the stamp holder

chooses to use amperage, voltage, and travel speed for the control of his

heat input, it will be necessary that the Welding Procedure Specification

include nominal ranges of the amperage, voltage, and travel speed to be

observed for all diameter electrodes to be employed in production welding.

These amperage and voltage ranges shall be those observed during the

welding of the welding procedure qualification test assemblies. Even

though the welding machine is a constant potential power source, the

voltage would be included in the WPS so that the Authorized Inspector

could assure himself that the intent of QW-409.1 is being met.

Question (4): In QW-410.24, does the travel speed recorded during the

welding of the welding procedure test coupons become the travel speed for

which the WPS is qualified, regardless of process or electrode size?

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Reply (4): With the revision of QW-409.1 to be published in the Winter

1978 Addenda, QW-410.24 will be deleted as the subject of travel speed is

an essential of heat input. The travel speed recorded during the welding of

the welding procedure test coupon shall be recorded on the procedure

qualification record and should be within the travel speed range for the

applicable electrode size listed within the Welding Procedure Specification.


Edition/Addenda:


Subject Description: Section IX, Welding and Brazing Qualifications




Question(s) and Reply(ies): Question (1): Are separate performance qualifications required for one

person, acting as both welder and welding operator, using the same processwithin the same essential variables?

Reply (1): Yes. Section IX considers welders and welding operators to be

distinct from one another for performance qualification purposes.

Question (2): Must the performance qualifications for welders and welding

operators be maintained and renewed separately?

Reply (2): Yes.


Edition/Addenda:


Subject Description: Section IX, QW-403.6, Thicknesses Qualified




Question(s) and Reply(ies): Question (1 ): Does QW-403.6, which states "For thicknesses less than 5/8

in. (16 mm) the thickness of the test coupon is the minimum thickness

qualified," have any applicability when the test coupon is 5/8 in. and above

in thickness?

Reply (1): QW-403.6 has no effect where the test coupon is 5/8 in. or over

in thickness.

Question (2): When QW-403.6 is listed as an essential variable, what is the

minimum thickness qualified when the test coupon is 5/8 in. or over in

thickness?

Reply (2): As stated above QW-403.6 does not apply to test coupons 5/8 in.

thick and over. The thickness range qualified here would be found in QW-

451 in general and may be limited by other applicable essential variables. If

QW-403.6 is an essential variable, if no other thickness limitation factorscome into play, the minimum thickness qualified by a test coupon ½ in.

thick would be ½ in. For a test coupon, 5/8 in. thick on from there up to but

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not including 3/4 in., the minimum thickness qualified would be 3/16 in.,

per QW-451.

ATTENTION


corrected replies sent to the inquirer.

Correction Issued: August 3, 1979

Replies (1) and (2); For thickness less than 5/8 in., the thickness of the test

coupon is the minimum thickness qualified for production welds. For

thicknesses 5/8 in. or greater, the minimum thickness qualified is 5/8 in.


Edition/Addenda:


Subject Description: Section IX, Lap Dimension Requirements for Reduced-Section TensionTest Specimens, QB-463.3




Question(s) and Reply(ies): Question: Is the X=4t min ratio shown in QB-463.3 binding, or may the test

specimen use a shorter lap?

Reply: The X=4t min ratio is not binding; it is included in QB-463.3 as a

typical lap-to-thickness ratio, but it is not in the scope of Section IX to

prescribe joint design. As QB-408.1, which states "A change in the joint

design details; such as, from a butt to a lap or socket, or a change in lap of plus or minus 25%," applies to all brazing procedure qualifications, a

mandatory X=4t min would indeed place a restriction on joint design.


Edition/Addenda:


Subject Description: Section IX, Tension Tests and Material Classifications




Question(s) and Reply(ies): Question (1): If a tension test specimen breaks in the weld metal at a

strength not less than that specified for the base metal, is it acceptable?

Reply (1): Yes. QW-153.1 provides for this.

Question (2): If a bend test specimen shows an open defect exceeding 1/8

in. in length on the convex side, is the test coupon acceptable?

Reply (2): Not generally. Your attention is directed to QW-163 for exact

bend test specimen acceptance criteria.

Question (3): What is the A-Number for electrodes having a nickel content

above 4%?

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Reply (3): It is important to state that the A-Numbers apply specifically to

the weld deposit and not to the electrode. A-Numbers 8 and 9 apply to weld

deposits with nickel contents ranging from 7.50% to 15.00% and from

15.00% to 37%, respectively, but these A-Number classifications also

require specified concentration ranges of carbon, chromium, molybdenum,

manganese, and silicon. For a weld deposit of, e.g., 4.5% nickel, there is no

A-Number classification, and depending on the applicable essential

variables, a separate qualification may be required for such a deposit.

Question (4): What P- and A-Numbers are applicable to materials not listed

in Section IX?

Reply (4): Occasionally a material to an SA Specification that is usable

under the ASME Boiler and Pressure Vessel Code has not received a

P-Number. If this be the case, the Subcommittee on Welding should be so

informed that the weldability of material may be considered. Concerning

non-Code listed materials, it is the policy of the Boiler and Pressure Vessel

Committee to assign P-Numbers only to those materials listed in Section II

of the ASME Boiler and Pressure Vessel Code. A-Number classifications

have been developed as a convenience for the grouping of weld metaldeposits of general usage in Code construction. It is not intended that all

weld metals will be included within the A-Numbers of QW-442 and

provisions of Section IX permit qualification of other weld metals.


Edition/Addenda:


Subject Description: Section IX, Retention of Qualification Specimens and Radiographs




Question(s) and Reply(ies): Question (1): What are the retention requirements for welder qualification

test coupons that have been accepted by radiography or welder qualification

test specimens that have been accepted by bend test?

Reply (1): There are no retention requirements in the Code for either the

bend tests nor the radiographs employed in welder qualification. QW-103

states the responsibility and the record that each manufacturer or contractor

shall maintain of the results obtained and shall certify those records. These

records shall be accessible to the Authorized Inspector with recommendedform, as shown in QW-480. Any requirements beyond certification of

records are local options between the stamp holder and his Authorized

Inspector.

Question (2): What are the retention requirements for accepted radiographs

for welder qualification coupons and of welding procedure qualification?

Reply (2): The reply to the previous question covers the retention

requirements for accepted radiographs of welder qualification coupons.

Radiography of a welding procedure qualification is not a requirement nor

is it permitted as an acceptance standard for a welding procedure

qualification. Welding procedure qualifications must meet the test required

by QW-451.

ATTENTION

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was added as a clarification and sent to the inquirer.

Clarification of Reply (1) Issued: October 5, 1979

Reply (1): There are no retention requirements in the Code for either the

bend tests nor the radiographs employed in welder qualification. However

QW-103.2 states, "Each manufacturer, or contractor, shall maintain a recordof the results obtained in welding procedure and welder and welding

operator performance qualifications." These records shall be accessible to

the Authorized Inspector with recom-mended form, as shown in QW-480.

Any requirements beyond certification of records are local options between

the stamp holder and his Authorized Inspector.


Edition/Addenda:


Subject Description: Section IX, QW-304 and QW-305Date Issued: 01/03/1979



Question(s) and Reply(ies): Question: Are there provisions in the ASME Boiler and Pressure Vessel

Code to permit performance qualification of a welder after the production

welding has been completed?

Reply: There are no provisions in the ASME Boiler and Pressure Vessel

Code which recognize qualifi-cation of welders or welding operators after

completion of the production welding. There are provisions which permit

concurrent qualifications of welders or welding operators as provided in

Section IX, QW-304 and QW-305.


Edition/Addenda:


Subject Description: Section IX, Performance Qualification for Small Tubing, QW-452.3




Question(s) and Reply(ies): Question: "1-in. diameter" tubing may vary (per SA-450) between 0.968

and 1.016 in. in diameter. Under the diameter limitations in QW-452.3 is a

welder qualified on a "2-in." (nominal) pipe qualified to weld the "1-in.

diameter" tube described above?

Reply: No. QW-452.3 is based on nominal pipe sizes for specimen sizes

and for qualification limits. The "over 1" minimum qualified by the 2 in.

nominal pipe size would exclude the 1 in. diameter tubing.



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Subject Description: Section IX, Use of ASTM A296 Grade CA6NM as P-No. 6 Group 4 for

Procedure and Performance Qualification




Question(s) and Reply(ies): Question: Is it permissible to use ASTM A-296, Grade CA6NM, in lieu of

SA-487, Class CA6NM, for welding procedure qualification testing and

performance qualification testing to be qualified per Section IX to weld

both ASTM A-296, Grade. CA6NM, and SA-487, Class CA6NM?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, Voltage and Amperage Ranges for a Welding Procedure

Specification




Question(s) and Reply(ies): Question: For Shielded Metal Arc and Gas Tungsten Arc Welding of a base

material without requirements for notch toughness, is the amperage and

voltage used for the particular diameter of electrode in procedure

qualification required to be within the range specified in the Welding

Procedure Specification?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, Welder Performance Qualification Materials QW-432 and QW-

442




Question(s) and Reply(ies): Question: On a performance qualification test does a welder who qualifies

with an E-7018 rod also qualify for using E-8018-B2 or E-9018-B3L rods?

Reply: Yes. They are all listed as having an F-Number classification of 4.

Since there are no A-Number essential variables, i.e., since no restrictions

are placed on weld-metal-deposit analysis for performance in Section IX

extends throughout a single F Number. You are encouraged to review the

F-Number essential variables for performance qualifications for further

material usability.


Edition/Addenda:

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Subject Description: Section IX, Slag Inclusions; Section VIII, Division 1, UW-13.2




Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materialsof dissimilar thicknesses, such as shown in Fig. UW-13.2 of Section VIII,

Division 1, what are the procedure qualification test plate thickness

requirements for the production welds?

Reply: The thicknesses qualified are subject to the requirements of QW-451

as further governed by the requirements of QW-202.2(b). Where dissimilar

thicknesses are being joined, the thickness of the thinner member shall

govern the required thickness of the procedure qualification test plate, as

given in QW-451.

ATTENTION



Clarification of Reply Issued: June 4, 1979


as further governed by the requirements of QW-202.2. You must qualify the

thickness range for both the base metal and the deposited weld metal

thickness ranges to be used in production. In addition, there are two rules in

QW-202.2 covering dissimilar thicknesses. Both rules are in the third

paragraph in Exception (1). For groove welding qualifications made on test

coupons of any thickness, there is no limit on the minimum depth ofdeposited weld metal nor on the thickness of the thinner of the base metals

being joined where they are of dissimilar thickness. Groove welding

qualifications made on test coupons 3 in. thick or more shall be applicable

for production use for base metal and deposited weld metal thickness up to

the maximum given in QW-451 except welds joining dissimilar thicknesses

of base metals in which the base metal on one side is equal to or less than

the maximum thickness qualified in the PQR, the base metal on the other

side may be of any greater thickness.


Edition/Addenda:Para./Fig./Table No:

Subject Description: Section IX, QW-403.6 Diameter Restrictions




Question(s) and Reply(ies): Question: Do the diameter restrictions of Section IX, QW-403.16 mandate

requalification of welders for fillet and socket welds in pipe 2-7/8 in.

nominal diameter and less when the welders have been qualified in large

diameter groove welds in pipe?

Reply: No.

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Edition/Addenda:


Subject Description: Section IX, Travel Speed As An Essential Variable for Hardfacing, QW-

282.4




Question(s) and Reply(ies): Question: For manually-controlled hardfacing procedure qualification, QW-

282.4(h) reads "A variation of more than 10% beyond the travel speed range

specified." Does this mean that the travel speed range must be specified on

the WPS?

Reply: Yes. The travel speed range must be specified and any change 10%

below the lowest speed specified and 10% above the highest speed specified

requires requalification.


Edition/Addenda:


Subject Description: Section IX, Peel Tests




Question(s) and Reply(ies): Question: When qualifying a lap joint by brazing to Section IX with brazing

filler metal of equal or greater strength than the base metals being joined,does failure in the base metal constitute passage of the peel test?

Reply: When qualifying a lap joint with a brazing filler metal of equal or

greater strength than the base metals being joined, the sectioning test of QB-

181 is used in place of the peel test of QB-170. Sectioning of the specimens

shall be as shown in QB-463.9 and acceptance standards of QB-181 shall be

met.


Edition/Addenda:






Question(s) and Reply(ies): Question: Is it the intent of QW-303.4 that qualification in the 6G position

shall qualify for all positions for double welds as described in that

paragraph?

Reply: Yes.

ATTENTION

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Clarification of Reply Issued: October 5, 1979

Reply: No. QW-303.4 covers 1G and 2G positions only. Refer to QW-303.1

and QW-461.7 for rules governing 6G.


Edition/Addenda:


Subject Description: Section IX, Changes in Supplementary Essential Variables, QW-403.5


Record Number: BC-78-782; W78-185


Question(s) and Reply(ies): Question: Under QW-403.5 is it permissible to change other supplementary

essential variables, i.e., position, temperature, or electrical characteristics by

welding a new test plate from which only impacts are taken?

Reply: No. The opening sentence of the second paragraph of QW-403.5

provides that all requirements be met. This means supplementary essential

as well as essential variables.


Edition/Addenda:


Subject Description: Section IX, QW-407.1(b)




Question(s) and Reply(ies): Question: Is it the intent of QW-407.1(b) to require the requalification of a

welding procedure when changing from one postweld heat treatment

temperature range to another postweld heat treatment temperature range

when both are below the critical range?

Reply: No. It is the intent of Section IX that the postweld heat treatment

temperature range, below the critical range, employed in the qualification ofa welding procedure specification for fabrication in accordance with a

Section of the Code shall also qualify for the required postweld heat

treatment below the critical range specified by other Sections of the Code.


Edition/Addenda:


Subject Description: Section IX, Variables for Welder Performance Qualification for Hard

Facing Weld Metal Overlay, QW-312



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Question(s) and Reply(ies): Question: Do the variables in QW-350 apply for the qualification of welders

for hard facing weld metal overlay application?

Reply: No. A welder who meets the requirements of QW-312 is qualified to

do all hard facing weld metal overlay applications using the same process.

ATTENTION



Clarification of Reply Issued: October 5, 1979

Reply: No. QW-312 covers qualification requirements for a welder for hard

facing weld metal overlay.


Edition/Addenda:


Subject Description: Section IX, Revision of the Procedure Qualification Record, QW-201.2




Question(s) and Reply(ies): Question: If a nonessential variable on a Welding Procedure Specification is

changed, must the Procedure Qualification Record supporting that Welding

Procedure Specification be changed to reflect the nonessential variable

change?

Reply: Since the Procedure Qualification Record is used to record the actual

data used in qualifying a Welding Procedure Specification, such data shall

not be revised when a nonessential variable is changed. QW-201.1 does

require, however, that a Welding Procedure Specification having undergone

a nonessential variable change must be revised or rewritten to reflect such a

change.


Edition/Addenda:


Subject Description: Section IX, Deletion of a Part of a Shielded Metal-Arc Procedure, QW-253




Question(s) and Reply(ies): Question: May a welder, qualified using a combination welding procedure

for shielded metal-arc welding on a single test coupon, specifically E6010

root and E7018 fill, weld on Code construction using the E7018 electrode

only, if the production joint employs a backing, and all other essential

variables are the same, and the welder deposits weld metal only within the

range qualified by his E7018 portion of his performance qualifications?

Reply: Yes. The thickness limit is that of the test coupon, including both

E6010 and E7018 deposited weld metals.

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Edition/Addenda:


Subject Description: Section IX, Pipe Welding Qualification Test Coupon Thickness Definition,

QW-451, QW-452




Question(s) and Reply(ies): Question: In QW-451 and QW-452 how are "Thickness T of Test Coupon

Welded" and "Nominal Pipe Size of Sample Weld," respectively, defined?

Reply: In both cases when standard-size pipe is used for qualification test

specimens, T is defined as the nominal wall thickness of the pipe as listed in

the applicable SA pipe specification in Section II.


Edition/Addenda:


Subject Description: Section IX, Additional Test Specimens Required for Notch Toughness

Condition, QW-403.5




Question(s) and Reply(ies): Question: If a welding procedure has already been qualified to satisfy all

requirements other than notch toughness and a new procedure is to bequalified without changing essential variables but incorporating additional

supplementary essential variables, will it be necessary to prepare an

additional test coupon using the new procedure, only to provide necessary

notch toughness specimens?

Reply: Yes.


Edition/Addenda:

Para./Fig./Table No:Subject Description: Section IX, Welding Material "F" Numbers


Record Number: NC-79-62


Question(s) and Reply(ies): Question: May welding rods, electrodes, and filler metals not meeting an

American Welding Society (AWS) Specification be assigned F-Numbers

provided they meet another specification, such as a Japan Institute of Steel

one?

Reply: No.


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Edition/Addenda:


Subject Description: Section IX, Welding Procedures When Essential Variables are Revised in

Subsequent Editions of Section IX




Question(s) and Reply(ies): Question: QW-311(a) of the 1977 Edition with Winter 1977 Addenda, now

requires that at least three weld beads of overlay be used for qualification

for weld overlay cladding. Is it the intent of the Code that weld overlay

procedures qualified before the Winter 1977 Addenda which became

mandatory now must be revised in order to clad components with Code

effective dates earlier than December 31, 1977?

Reply: No.


Edition/Addenda:


Subject Description: Sections IX and III, Weld Thickness Qualified and Postweld Heat

Treatment Requirements




Question(s) and Reply(ies): Question (1): A shielded metal arc welding procedure is qualified using a 1

in. thick test coupon. What are the maximum plate thickness and weld depthqualified thereby?

Reply (1): The maximum plate thickness and weld depth qualified are each

2 in., as indicated by QW-451.

Question (2): Does Section IX limit the SMAW weld repair depth qualified

when no postweld heat treatment is used?

Reply (2): No.

Question (3): For a repair weld procedure qualified as described above,

what is the maximum repair, partial penetration, or fillet weld thickness ordepth that can be made without postweld heat treatment under Section III,

Subsection NE, Table NE-4622.3-1?

Reply (3): Repair, partial penetration, and fillet welds up to ¾ in. thick or

deep may be made under the conditions described above provided the base

metal is over 1½ in. thick and provided a 200°F minimum preheat is

applied.


Edition/Addenda:


Subject Description: Section IX, Brazing Qualification Peel-Test Acceptance Criteria, QB-172


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Record Number: BC-78-221; W-78-147


Question(s) and Reply(ies): Question: Is it the intent of Section IX, QB-172 that brazing qualification

peel test specimens must meet all of the acceptance criteria of QB-172

[namely, in the paragraph itself and subparagraphs (1), (2), and (3)]?

Reply: Yes. A specimen failing to meet any of the criteria is unacceptable.


Edition/Addenda:


Subject Description: Section IX, Welding of Split Backing Rings, QW-402.2, QW-402.4




Question(s) and Reply(ies): Question: If a welder is qualified to weld using a split backing ring, must he

be additionally qualified to weld a joint without backing to weld the gap of

a split backing ring?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, Code Edition Applicable to Assigning Essential Variables to

Old Welding Procedures, Preamble




Question(s) and Reply(ies): Question: When position was an essential variable for welding procedure

specification test, may the welding procedure specification now be revised

to include other positions without requalification?

Reply: Yes.


Edition/Addenda:






Question(s) and Reply(ies): Question: To qualify a welder under QW-304 or a welder operator under

QW-305 by radiographic examination, must a 6 in. test coupon beevaluated?

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Reply: For plate, a test coupon of a minimum of 6 in. long must be

evaluated by radiographic examination to qualify a welder under QW-304

or a welder operator under QW-305. For pipe, the entire weld

circumference shall be examined. When this circumference is less than 6

in., additional coupons shall be welded to obtain 6 in. of weld length, but

not more than four samples are required. That is, four small diameter

samples may not equal the 6 in. length.


Edition/Addenda:


Subject Description: Section IX, Thickness Qualified for Procedure Qualification




Question(s) and Reply(ies): Question: Does the thickness of the base metal in a production groove weldor the thickness of the groove weld metal govern the thickness range to

which a Welding Procedure Specification shall be qualified?

Reply: For groove weld procedure qualification, QW-202.2 states that

qualification shall encompass both the base metal and the weld-metal

thickness. This also applies to partial penetration groove welds.


Edition/Addenda:


Subject Description: Section IX, Thickness Qualified in Partial Penetration Weld Procedure

Qualification, QW-45l




Question(s) and Reply(ies): Question: For procedure qualification of partial penetration welds, what

dimension is used in determining the maximum thickness qualified: the

base metal thickness, or the thickness of the weld metal (i.e., the weld

groove depth)?

Reply: For groove weld procedure qualification, QW-202.2 states thatqualification shall encompass both the base metal and the weld-metal

thickness. This also applies to partial penetration groove welds.


Edition/Addenda:


Subject Description: Section IX, Welding Procedure Qualification Requirements for Clad Plate,

for Use in Section VIII, Division 1 Construction



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Question(s) and Reply(ies): Question: An integrally clad plate consists of a base plate of SA-515 Grade

70 which is 22 mm thick and cladded with SA-240 Type 304L which is 2

mm thick. The base plates are joined with E 7016 weld metal and the

cladding plates are joined with E 309 and E 308L weld metal. What tests

are required on this integrally clad plate to meet the requirements of Section

IX plus additional requirements of Section VIII, Division 1, UCL-40 and

-41?

Reply: 1st Condition: Thickness of cladding is included in design per UCL-

23(c). (1) Weld an integrally clad plate with the base plate being at least 11

mm thick and the clad being at least 1.6 mm thick using F-No. 4 and F-No.

5 electrodes on the respective materials. (2) Weld test plate of P-No. 1

material equal to or less than 22 mm thick by overlaying in accordance with

QW-214 and QW-281 with the appropriate desired electrodes. 2nd

Condition: Thickness of cladding is not included in design per UCL-23(c).

(3) Make (1) and (2) above or (4) and (5) below and (2) above. (4) Weld

P-No. 1 material (over 11 mm) separately with F-No. 4 electrode. (5) Weld

P-No. 8 material 1.6-9.6 mm (separately) with F-No. 5 electrode.


Edition/Addenda:






Question(s) and Reply(ies): Question: Do austenitic base metals fall under the category of ferritic base

metals, when notch toughness is required for the weld metal?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, Interpretation of the Preamble and QW-100.3




Question(s) and Reply(ies): Question (1): In the case where the mandatory qualification requirements

have been made more restrictive in Editions later than the 1962 Edition, are

Welding Procedure and Performance Qualifications that were made

according to the 1962 Edition still acceptable as a qualified Welding

Procedure Specification?

Reply (1): Yes.

Question (2): Is it mandatory that the WPS be updated to document all

essential variables required by the current edition of Section IX?

Reply (2): No.

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Question (3): In 1968 a procedure was qualified using an A-No. 4

classification of weld metal analysis. Subsequently the A-Number Table

was revised and the composition of the weld metal now place it in the

A-No. 5 classification. Since QW-404.5 indicates a change in weld metal

composition as an essential variable, is it necessary to requalify this updated

Welding Procedure Specification?

Reply (3): No.


Edition/Addenda:


Subject Description: Section IX, Nominal Electrode Diameter, QW-281.3 and QW-282.3




Question(s) and Reply(ies): Question: What is the meaning of the word "nominal" as used in QW-281.3

and QW-282.3?

Reply: The word "nominal" in QW-281.3 and QW-282.3 refers to the listed

size of electrodes and electrode tolerances as a consideration; that is, 5/32

in. would be the nominal size, and tolerances permitted are not a

consideration. Another size electrode, such as 1/8 in. is not considered to be

within the tolerances of the 5/32 in. nominal size electrode under the

definition of the word "nominal."


Edition/Addenda:






Question(s) and Reply(ies): Question: A welding procedure specification was written to weld base

metals listed under one P-Number but having different Group Numbers.

Does QW-403.5 require requalification, if the welding procedure

specification has been qualified with each of the base metals welded toitself, using the same electrode or filler metal and the same essential

variables?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, Temperature Ranges for PWHT, QW-200.1 and QW-200.2



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Question(s) and Reply(ies): Question (1): For materials where UCS-56(e)(3) of Section VIII, Division 1

permits a maximum difference of 150°F between the various parts of a

vessel being postweld heat treated, is a PWHT temperature range of 150°F a

reasonable range to be specified in the WPS?

Reply (1): Yes.

Question (2): Is it necessary that the PWHT temperature range specified in

the WPS be the same as the actual temperature range recorded for the

PWHT carried out on the test coupon of the supporting PQR?

Reply (2). No.


Edition/Addenda:


Subject Description: Section IX, QW-452, Performance Qualification Specimens




Question(s) and Reply(ies): Question (1): What are the requirements for performance qualification when

using a transverse bend test and the thickness of the material is less than

1/16 in.?

Reply (1): QW-310.1 of Section IX provides for qualifications where the

thicknesses are less than 1/16 in.

Question (2): What is the minimum thickness qualified for a groove weld

when the nominal pipe size of the sample weld is over 2 in. and t= ¾ in.?

Reply (2): The minimum thickness qualified would be 3/16 in.


Edition/Addenda:


Subject Description: Section IX, QW-304 and QW-305



Question(s) and Reply(ies): Question: The SAW process under consideration consists of a wire and flux

feed in a fixed position with the work being rotated on rollers by a

positioner. The wire is fed at a rate based on voltage and current

adjustments made by a worker as the weld progresses. Is a worker welding

with this equipment considered to be a welder or a welder operator?

Reply: A worker using this equipment would be a welding operator.


Edition/Addenda:

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Subject Description: Section IX, Slag Inclusions




Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materialsof dissimilar thicknesses, such as shown in Fig. UW-13.2 of Section VIII,

Division 1, what are the procedure qualification test plate thickness

requirements for the production welds?


as further governed by the requirements of QW-202.2. You must qualify the

thickness range for both the base metal and the deposited weld metal

thickness ranges to be used in production. In addition, there are two rules in

QW-202.2 covering dissimilar thicknesses. Both rules are in the third

paragraph in Exception (1). For groove welding qualifications made on test

coupons of any thickness, there is no limit on the minimum depth of

deposited weld metal nor on the thickness of the thinner of the base metals being joined where they are of dissimilar thickness. Groove welding

qualifications made on test coupons 3 in. thick or more shall be applicable

for production use for base metal and deposited weld metal thickness up to

the maximum given in QW-451 except welds joining dissimilar thicknesses

of base metals in which the base metal on one side is equal to or less than

the maximum thickness qualified in the PQR, the base metal on the other

side may be of any greater thickness.


Edition/Addenda:


Subject Description: Section IX, Performance Qualification on Split Backing Rings


Record Number:


Question(s) and Reply(ies): Question: If a welder is qualified to weld using a split backing ring, must he

be additionally qualified to weld a joint without backing to weld the gap of

a split backing ring?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, QW-304 and QW-305




Question(s) and Reply(ies): Question: Please classify submerged-arc welding performed under thecontrol and observation of an individual as either semi-automatic or

machine welding.

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Reply: Semi-automatic Arc Welding is arc welding with equipment which

controls only the filler metal feed. The advance of the welding is manually

controlled. The person welding with these conditions is classified with

manual welding as welders. This normally includes GMAW, FCAW, and

SAW (hand held). Machine Welding is welding with equipment which

performs the welding operation under the constant observation and control

of a welding operator. The welding operator may adjust the height and

location of the arc but the machine advances the welding head. The personwelding with these conditions is classified with automatic welding as a

welding operator. This normally includes SAW.


Edition/Addenda:




Record Number: BC-79-242Interpretation Number : IX-79-39

Question(s) and Reply(ies): Question: A material was purchased to an ASTM Specification that was not

included in the P-Number table at that time, and a PQR was then

documented using this material. In subsequent Addenda this material was

issued a P-Number. Is it permissible to qualify a procedure using the PQR

that was documented before this Addenda was issued?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, Positions Qualified When QW-405.2 is an Essential Variable




Question(s) and Reply(ies): Question: If QW-405.2 is an essential variable for procedure qualification,

does qualification in the vertical (3G) position with uphill qualification

qualify the procedure for all other positions?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX and Section III, P-Numbers for ASTM A-572, A-588, and

A-633 as Used Under Case N-71 (1644), QW-422




Question(s) and Reply(ies):

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Question (1): Is it permissible for an Owner to assign P-Numbers to

materials in Code Cases for Section III, Division 1 construction when

considering either welding or postweld heat treatment?

Reply (1): No, only the Boiler and Pressure Vessel Committee may assign

P-Numbers to materials.

Question (2): Are ASTM materials A-588, A-572 and A-633 considered asP-No. 1 materials in Section IX?

Reply (2): No, the above materials have not been submitted for approval as

SA specifications and assignment of P-Numbers by the Committee. Upon

proper notification that these materials will be adopted as SA

Specifications, the Committee will then review these materials for the

proper assignment of P-Numbers. P-Numbers cannot be assigned in any

other manner either for welding procedures or postweld heat treatment

exemptions.

Standard Designation:BPV Section IX

Edition/Addenda:






Question(s) and Reply(ies): Question: Welders have been qualified in 10 in. Schedule 80 and 120 pipe

in the 6G position. Are these welders then permitted to make fillet welds in

all sizes, diameters, including, for instance, 1 in. O.D., and thicknesses

within the qualified process?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, Performance Qualification, QW-300




Question(s) and Reply(ies): Question: Can an organization use its welding supervisors to qualify

welders to procedures, using the tests required in Section IX "Welding and

Brazing Qualification," without utilizing the services of an outside testing

organization?

Reply: Yes.


Edition/Addenda:


Subject Description: Section IX, QW-462.1(c) Applicability of Notes

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Question(s) and Reply(ies): Question: Do the notes immediately beneath QW-462.1(c) relate only to

that figure or are they also applicable to QW-462.1(a) and QW-462.1(b)?

Reply: These notes are also applicable to QW-462.1(a) and (b).


Edition/Addenda:


Subject Description: Section IX, P-Number Classification, QW-422




Question(s) and Reply(ies): Question: If a material does not have a P-Number classification, is it still

suitable for welding in accordance with Section IX?

Reply: Section IX addresses only those materials listed in QW-422; the use

of other materials is dependent upon the discretion of the manufacturer or

contractor.


Edition/Addenda:


Subject Description: Section IX, QW-452, Performance Qualifications of Joints Using Split

Backing Rings




Question(s) and Reply(ies): Question: If a welder is to be qualified on a joint with a split backing ring, is

it necessary to remove a specimen from the gap of the ring to perform the

required bend tests?

Reply: No.


Edition/Addenda:


Subject Description: Section IX, Preamble Introduction QW-201.3




Question(s) and Reply(ies): Question (1): The Preamble acknowledges that procedure and performancequalifications made in accordance with recommendations of the 1962 or

later Editions of the Code are acceptable, providing they were made in

accordance with the Edition of the Code in effect at that time. May a

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procedure qualified in 1971 be rewritten to remove information which is not

listed as Essential, Supplementary Essential, or Non-essential Variables?

Reply (1): Changes may be made to Nonessential Variables of a welding

procedure specification, provided such changes are documented with

respect to both Essential and Nonessential Variables of the specified

welding process or processes, either in an amendment to the original WPS

or a new WPS without requalification.

Question (2). Must a procedure qualified after 1962 be revised to reflect

new or deleted Essential or Nonessential Variables?

Reply (2): No.

Question (3): The introduction under Article II, page xx, discusses the

elimination of diameter requirements up to 24 in. diameter pipe for

procedure qualification. Where is the 24 in. diameter required for procedure

qualification discussed in the body of Section IX?

Reply (3): The introduction is an aid to the user of Section IX. The

particular paragraphs cited relate to items which were changed from

previous Editions of the Code. Since the 24 in. diameter is no longer a

requirement for procedure qualification, there is no cause to discuss it

within the body of Section IX.

Question (4): Where a procedure qualification test coupon with a total base

metal thickness of 1 in. is to be welded using GTAW for 3/8 in., SMAW for

¼ in., and SAW for 3/8 in., in that sequence, what are the answers to the

following questions?

(4a): What is the qualification range for the GTAW process?

Reply (4a): 1/16 in. to 3/4 in.

(4b): What is the qualification range for the SMAW process?

Reply (4b): 1/16 in. to ½ in.

(4c): What is the qualification range for the SAW process?

Reply (4c). 1/16 in. to 3/4 in.

(4d): What is the qualification range for the combined process weld?

Reply (4d): 1/16 in. to 2 in., providing the individual limits for each processare observed and taken to their maximums.

(4e): Must the WPS list the qualification range for each process?

Reply (4e): Yes.

Question (5): If a welding procedure for SMAW is qualified for 1/16 in. to

1/2 in. without a backing ring and another SMAW welding procedure

specification for 3/16 in. to 2 in. with a backing ring, may the two

procedures be used to weld a 1 in. thick base material with no backing ring?

Reply (5): Yes.

Question (6): Qualification A is for the GTAW process from 0.062 in. to

0.166 in. and Qualification B is for the GTAW welding process from 0.187

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in. to 1.5 in. May a plate 0.180 in. thick be welded using one or both of

these qualifications?

Reply (6): No.

Question (7): Where a welding procedure specification is qualified using

the GTAW process for 3/16 in. of the qualification plate and the SMAW

process for 1/16 in. of the plate, may you use this welding procedurespecification to weld a 0.180 in. thick plate by the GTAW process?

Reply (7): The qualification in the question will permit the welding of a

0.180 in. thick plate by the gas tungsten arc process qualification which

covers this thickness range. Processes may be deleted from the production

joint qualified by a combination of processes or procedures.


Edition/Addenda:


Subject Description: Section IX, Welding Performance Qualification, QW-300




Question(s) and Reply(ies): Question: Can a welder be qualified to a process without a qualified

procedure?

Reply: No, a performance qualification test must be welded in accordance

with a Welding Procedure Specification that has been qualified by the

Manufacturer or contractor having the responsibility for conducting the test.


Edition/Addenda:






Question(s) and Reply(ies): Question (1): QW-407.2 is a supplementary essential variable for allwelding processes except EBW, OFW, and stud welding. This variable

requires that the procedure qualification test be subjected to heat treatment

essentially equivalent to that encountered in the heat treatment of base

metals and in the fabrication of the vessel or vessel parts, including at least

the aggregate times at temperature(s). Does this variable apply only to

vessels for which notch toughness is a requirement?

Reply (1): Yes.

Question (2): Is a procedure qualification heat treatment time of at least

80% of the heat treatment time actually applied to the vessel considered to

be essentially equivalent to the heat treatment time of the vessel?

Reply (2): Yes.

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Edition/Addenda:


Subject Description: Section IX, Performance Qualification Using SMAW




Question(s) and Reply(ies): Question: There appears to be a conflict on base metal essential variables

for SMAW welder qualification between the requirements of QW-310.4

and QW-353. QW-403.16, listed under QW-353, states that a change

outside of the qualified thickness range is the only base metal essential

variable. QW-310.4 states the base metals under which the welder must be

qualified for the production weld, with some exceptions. What is to be

followed for the qualification or extending of a previous qualification on a

welder in the SMAW process?

Reply: Both paragraphs cited in the inquiry are compatible. The purpose ofthe essential variable under QW-353 is to state the limits of the qualification

as based upon thickness range. The purpose of QW-310.4 is to state the

permissible base metals which can be employed in accordance with the

electrode which is being qualified for the welder qualification.


Edition/Addenda:


Subject Description: Section IX, Regarding Thickness Limitation for Performance Qualification

of Combined Processes Using a Backing Ring, QW-452.3




Question(s) and Reply(ies): Question: A welder who satisfactorily passes a performance qualification

test using two passes with GTAW and the balance with SMAW on a 6 in.

Schedule XXH (0.864 wall) pipe is qualified for what thickness in the

combined processes per QW-452.3?

Reply: QW-452.3 was revised as published in the Summer 1979 Addenda.

This clarification states that the thickness qualified for each process isdependent on the thickness of the weld metal deposited in the performance

qualification test by that process. Where the weld metal deposited by each

process in the performance qualification test is less than 3/4 in., the

qualification limit with that process shall be twice the thickness qualified. If

the thickness of weld metal deposited with a welding process is in excess of

3/4 in., there will be an unlimited qualification in thickness.


Edition/Addenda:


Subject Description: Section IX, Welding Qualification Mechanical Properties


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Question(s) and Reply(ies): Question (1): A procedure is being written to weld 3 in. thick SA-515-70

P-No. 1 base metal in production. The base metal used for procedure

qualification is 3 in. thick SA-515-55 P-No. 1, welded with an E-7018

F-No. 4, A-No. 1 electrode. The test coupon was stress relieved for 3 hr at

1125°F. Charpy impact tests were not required. The tensile tests failed at54,800 psi in the base metal. Is this procedure acceptable per Section IX to

weld 70,000 psi min. tensile P-No. 1 material even though the tensile

specimen failed at 54,800 psi?

Reply (1) Yes, per QW-153(d), provided a proper Welding Procedure

Specification is written as described in the following questions.

Question (2): What is the intent of Section IX QW-153, QW-421, and QW-

422 with respect to mechanical properties (tensile strength) of materials

substituted for the base metal used in procedure qualification within the

same P-Number grouping?

Reply (2): The intent of QW-421 is to "reduce the number of welding

procedure qualifications required" with considerations being given as stated

in the remainder of the paragraph. In addition, QW-201 describes the

documents of "Welding Procedure Specification" (WPS) and "Procedure

Qualification Record" (PQR) both of which are required. Also, in addition,

the Welding Variables of QW-250 need be considered and documented, as

required, in both the WPS and the PQR.

Question (3): Can the tensile test acceptance criteria of QW-153 for the

base metal used in procedure qualification be applied to other base metals

within the same P-Number grouping that may be substituted for the

procedure qualification base metal in actual production?

Reply (3): Yes, provided that a WPS is written as described in QW-201.1.

Question (4): Do the words "where this can logically be done" and "does

not imply that base metals may be indiscriminately substituted for a base

metal which was used in the procedure qualification test," as stated in the

second paragraph of QW-421, mean that the procedure cited in Question (1)

qualifies for welding any and

asme ix interpretation-part2

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