ASME IX Interpretation-Part2

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Interpretation Detail Print to PDF Please limit your selection on the search results screen to 10 interpretations. 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

Record Number:

BC-79-315

Date Issued:

Interpretation Number :

06/27/1979 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.

Standard Designation: Edition/Addenda:

Para./Fig./Table No:

BPV Section IX

Subject Description:

Section IX, SMAW Procedure Qualifications

Record Number:

BC-78-113

Date Issued:


12/13/1978 IX-78-100

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).



BPV Section IX


Section IX, Semi-Automatic and Automatic Welding

Record Number:

BC-78-662

Date Issued:


12/14/1978 IX-78-101

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-407.1, PWHT of Weld Procedure

Record Number:

BC-78-488

Date Issued:


12/15/1978 IX-78-102

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 various conditions outlined in QW-407.1 Standard Designation: Edition/Addenda:

Para./Fig./Table No: Subject Description: Date Issued:

Record Number:


Question(s) and Reply(ies):

BPV Section IX Section IX, Performance Qualification for Small Diameter Tubing, QW452.3 12/18/1978 BC-78-634 IX-78-103


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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 ¾ in. 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-403.16, Diameter Restrictions

Record Number:

BC-78-778

Date Issued:


12/21/1978 IX-78-104

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.



BPV Section IX


Section IX, 1974 Edition, QW-403.6

Record Number:

BC-78-263

Date Issued:


06/23/1978 IX-78-83

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.


BPV Section IX



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

Record Number:

BC-78-266

Date Issued:


06/23/1978 IX-78-84

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.



BPV Section IX


Section IX, QW-201.1 and QW-201.2

Record Number:

BC-78-404

Date Issued:


07/05/1978 IX-78-85

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-305

Record Number:

BC-78-408

Date Issued:


07/11/1978 IX-78-86

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 QW354. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Summer Addenda, QW-202.2

Record Number:

BC-78-132

Date Issued:


07/31/1978 IX-78-87

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QB-402.1 and QB-402.2 Material Qualification

Record Number:

BC-78-471

Date Issued:


08/02/1978 IX-78-88

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-201.3

Record Number:

BC-78-466

Date Issued:


08/03/1978 IX-78-89

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, without requalification, 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.



BPV Section IX


Section IX, QW-462.1(a)

Record Number:

BC-78-438

Date Issued:


08/11/1978 IX-78-90

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 as specified 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 plate thickness? (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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-302.3 and QW-452.3

Record Number:

BC-78-487

Date Issued:


08/14/1978 IX-78-91

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, QW302.3 requires four specimens from pipe in positions 5G or 6G of QW461.3 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Performance Qualification on Combination Welding

Record Number:

BC-78-547

Date Issued:


09/25/1978 IX-78-92

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 amount deposited 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. Standard Designation: Edition/Addenda:


BPV Section IX



Record Number:

BC-78-558

Date Issued:


10/04/1978 IX-78-95

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 least 1 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: Edition/Addenda:


BPV Section IX


Section IX, Electrodes and Flash Butt Welding

Record Number:

BC-78-553

Date Issued:


10/02/1978 IX-78-93

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 ASME Boiler 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. Standard Designation: Edition/Addenda:

BPV Section IX



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Section IX, QW-403.5, QW-406.3, QW-409.1, and QW-410.24

Record Number:

BC-78-531

Date Issued:


10/03/1978 IX-78-94

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 when the 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 by the 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Welding and Brazing Qualifications

Record Number:

BC-78-662

Date Issued:


12/05/1978 IX-78-96

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 process within 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-403.6, Thicknesses Qualified

Record Number:

BC-78-664

Date Issued:


12/05/1978 IX-78-97

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 QW451 in general and may be limited by other applicable essential variables. If QW-403.6 is an essential variable, if no other thickness limitation factors come 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

The foregoing interpretation has been further considered and the following 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. Standard Designation: Edition/Addenda:


Record Number:


BPV Section IX Section IX, Lap Dimension Requirements for Reduced-Section Tension Test Specimens, QB-463.3 12/06/1978 BC-78-393 IX-78-98

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.



BPV Section IX


Section IX, Tension Tests and Material Classifications

Record Number:

BC-78-663

Date Issued:


12/07/1978 IX-78-99

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 metal deposits 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Retention of Qualification Specimens and Radiographs

Record Number:

BC-78-780

Date Issued:


01/02/1979 IX-79-01

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 recommended form, 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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The foregoing interpretation has been further considered and the following 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 record of 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-304 and QW-305

Record Number:

BC-78-785

Date Issued:


01/03/1979 IX-79-02

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.



BPV Section IX


Section IX, Performance Qualification for Small Tubing, QW-452.3

Record Number:

BC-78-634

Date Issued:


01/02/1979 IX-79-03

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.


BPV Section IX



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Subject Description: Date Issued:

Record Number:


Section IX, Use of ASTM A296 Grade CA6NM as P-No. 6 Group 4 for Procedure and Performance Qualification 01/09/1979 BC-78-357 IX-79-04

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.



Record Number:


BPV Section IX Section IX, Voltage and Amperage Ranges for a Welding Procedure Specification 01/17/1979 BC-78-635 IX-79-05

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.



Record Number:


BPV Section IX Section IX, Welder Performance Qualification Materials QW-432 and QW442 01/23/1979 BC-78-765 IX-79-06

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.


BPV Section IX


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

Record Number:

BC-78-279

Date Issued:


01/29/1979 IX-79-07

Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materials of 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

The foregoing interpretation has been further considered and the following was added as a clarification and sent to the inquirer. Clarification of Reply Issued: June 4, 1979

Reply: The thicknesses qualified are subject to the requirements of QW-451 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-403.6 Diameter Restrictions

Record Number:

BC-78-778

Date Issued:


02/06/1979 IX-79-08

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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Record Number:


BPV Section IX Section IX, Travel Speed As An Essential Variable for Hardfacing, QW282.4 02/21/1979 BC-79-31 IX-79-09

Question(s) and Reply(ies): Question: For manually-controlled hardfacing procedure qualification, QW282.4(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.



BPV Section IX


Section IX, Peel Tests

Record Number:

BC-78-840

Date Issued:


02/20/1979 IX-79-10

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 QB181 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.



BPV Section IX


Section IX, QW-303

Record Number:

BC-79-22

Date Issued:


02/15/1979 IX-79-11

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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The foregoing interpretation has been further considered and the following was added as a clarification and sent to the inquirer. 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Changes in Supplementary Essential Variables, QW-403.5

Record Number:

BC-78-782; W78-185

Date Issued:


02/26/1979 IX-79-12

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.



BPV Section IX


Section IX, QW-407.1(b)

Record Number:

BC-78-636

Date Issued:


02/26/1979 IX-79-13

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 of a 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.



Record Number:

BPV Section IX Section IX, Variables for Welder Performance Qualification for Hard Facing Weld Metal Overlay, QW-312 02/26/1979 BC-78-798


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IX-79-14

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

The foregoing interpretation has been further considered and the following was added as a clarification and sent to the inquirer. Clarification of Reply Issued: October 5, 1979

Reply: No. QW-312 covers qualification requirements for a welder for hard facing weld metal overlay. Standard Designation: Edition/Addenda:


BPV Section IX


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

Record Number:

BC-79-33

Date Issued:


02/27/1979 IX-79-15

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.



BPV Section IX


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

Record Number:

BC-78-674

Date Issued:


03/01/1979 IX-79-16

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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Record Number:


BPV Section IX Section IX, Pipe Welding Qualification Test Coupon Thickness Definition, QW-451, QW-452 03/12/1979 BC-79-69 IX-79-17

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.



Record Number:


BPV Section IX Section IX, Additional Test Specimens Required for Notch Toughness Condition, QW-403.5 03/19/1979 BC-79-68 IX-79-18

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 be qualified 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.



BPV Section IX


Section IX, Welding Material "F" Numbers

Record Number:

NC-79-62

Date Issued:


03/19/1979 IX-79-19

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.

Standard Designation:

BPV Section IX


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Edition/Addenda:


Record Number:


Section IX, Welding Procedures When Essential Variables are Revised in Subsequent Editions of Section IX 03/19/1979 BC-79-73 IX-79-20

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.



Record Number:


BPV Section IX Sections IX and III, Weld Thickness Qualified and Postweld Heat Treatment Requirements 03/19/1979 BC-79-101 IX-79-21

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 depth qualified 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 or depth 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. Standard Designation: Edition/Addenda:


BPV Section IX Section IX, Brazing Qualification Peel-Test Acceptance Criteria, QB-172 04/25/1979


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Record Number:


BC-78-221; W-78-147 IX-79-22

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.



BPV Section IX


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

Record Number:

BC-79-187

Date Issued:


04/30/1979 IX-79-23

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.



Record Number:


BPV Section IX Section IX, Code Edition Applicable to Assigning Essential Variables to Old Welding Procedures, Preamble 04/30/1979 BC-79-64 IX-79-24

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.



BPV Section IX



Record Number:

BC-79-185

Date Issued:


05/11/1979 IX-79-25

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 be evaluated?


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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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Thickness Qualified for Procedure Qualification

Record Number:

BC-79-65

Date Issued:


05/10/1979 IX-79-26

Question(s) and Reply(ies): Question: Does the thickness of the base metal in a production groove weld or 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.



Record Number:


BPV Section IX Section IX, Thickness Qualified in Partial Penetration Weld Procedure Qualification, QW-45l 05/10/1979 BC-79-50 IX-79-27

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 that qualification shall encompass both the base metal and the weld-metal thickness. This also applies to partial penetration groove welds.



Record Number:


BPV Section IX Section IX, Welding Procedure Qualification Requirements for Clad Plate, for Use in Section VIII, Division 1 Construction 05/14/1979 BC-79-30 IX-79-28


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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 UCL23(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.



BPV Section IX



Record Number:

BC-79-215

Date Issued:


05/29/1979 IX-79-29

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.



BPV Section IX


Section IX, Interpretation of the Preamble and QW-100.3

Record Number:

BC-79-219

Date Issued:


05/30/1979 IX-79-30

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Nominal Electrode Diameter, QW-281.3 and QW-282.3

Record Number:

BC-79-181

Date Issued:


05/16/1979 IX-79-31

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."



BPV Section IX



Record Number:

BC-79-225

Date Issued:


05/30/1979 IX-79-32

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 to itself, using the same electrode or filler metal and the same essential variables? Reply: No.



BPV Section IX


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

Record Number:

BC-79-252

Date Issued:

06/12/1979


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IX-79-33

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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-452, Performance Qualification Specimens

Record Number:

BC-79-224

Date Issued:


06/01/1979 IX-79-34

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. Standard Designation: Edition/Addenda:


BPV Section IX



Record Number:

BC-79-228

Date Issued:


05/30/1979 IX-79-35

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.


BPV Section IX


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Section IX, Slag Inclusions

Record Number:

BC-78-279

Date Issued:


06/04/1979 IX-79-36

Question(s) and Reply(ies): Question: When using partial penetration welds for the joining of materials of 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. 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.



Record Number:


BPV Section IX Section IX, Performance Qualification on Split Backing Rings 06/05/1979 IX-79-37

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.



BPV Section IX



Record Number:

BC-79-183

Date Issued:


06/05/1979 IX-79-38

Question(s) and Reply(ies): Question: Please classify submerged-arc welding performed under the control 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 person welding with these conditions is classified with automatic welding as a welding operator. This normally includes SAW. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, QW-200

Record Number:

BC-79-242

Date Issued:


06/07/1979 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.



BPV Section IX


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

Record Number:

BC-79-63

Date Issued:


03/27/1979 IX-79-40

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.



Record Number:



BPV Section IX 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 04/11/1979 BC-78-661 IX-79-41


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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 as P-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: Edition/Addenda:


BPV Section IX



Record Number:

BC-78-788

Date Issued:


06/18/1979 IX-79-44

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.



BPV Section IX


Section IX, Performance Qualification, QW-300

Record Number:

BC-79-263

Date Issued:


06/18/1979 IX-79-45

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.



BPV Section IX Section IX, QW-462.1(c) Applicability of Notes


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Date Issued:

06/19/1979


IX-79-46

Record Number:

BC-78-784

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).



BPV Section IX


Section IX, P-Number Classification, QW-422

Record Number:

BC-79-281

Date Issued:


06/20/1979 IX-79-48

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.



Record Number:


BPV Section IX Section IX, QW-452, Performance Qualifications of Joints Using Split Backing Rings 06/26/1979 BC-79-308 IX-79-49

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.



BPV Section IX


Section IX, Preamble Introduction QW-201.3

Record Number:

BC-79-191

Date Issued:


05/27/1979 IX-79-42

Question(s) and Reply(ies): Question (1): The Preamble acknowledges that procedure and performance qualifications 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 process are 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 procedure specification 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Welding Performance Qualification, QW-300

Record Number:

BC-79-272

Date Issued:


06/19/1979 IX-79-47

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.



BPV Section IX



Record Number:

BC-79-337

Date Issued:


07/09/1979 IX-79-51

Question(s) and Reply(ies): Question (1): QW-407.2 is a supplementary essential variable for all welding 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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BPV Section IX


Section IX, Performance Qualification Using SMAW

Record Number:

BC-79-237

Date Issued:


07/19/1979 IX-79-64

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 of the 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.



Record Number:


BPV Section IX Section IX, Regarding Thickness Limitation for Performance Qualification of Combined Processes Using a Backing Ring, QW-452.3 07/26/1979 BC-79-240 IX-79-65

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 is dependent 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.



BPV Section IX Section IX, Welding Qualification Mechanical Properties 06/13/1979


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Record Number:


BC-78-832 IX-79-43

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 at 54,800 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 QW422 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 all of the base metals listed in the same P-Number grouping of QW-422 regardless of tensile strength? Reply (4): Yes, again provided that a proper WPS is written to cover the usage.

Question (5): Does the purpose of the WPS and PQR as stated in the fourth paragraph of the Introduction to Section IX mean that the tensile strength of the procedure qualification test must be at least equal to the minimum tensile strength of the base metal for its intended application per the requirements of QW-153? Reply (5): No. As stated in the fourth paragraph of the Introduction to Section IX, the purpose of the WPS and the PQR (combined), is "to determine that the weldment proposed for construction is capable of having the required properties for its intended application." It should also be noted that QW-103 states that "Each Manufacturer or contractor is responsible for the welding done by his organization and shall conduct the tests" etc. It is allowed that the Manufacturer use judgment in meeting his responsibilities for the intended application. There are, of course, design conditions where


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deposited metal of strengths lower than that of the base metal, or higher, are satisfactory. In addition, properties other than tensile strength can be of importance to the intended application. Question (6): Is the intent of QW-403.11 that a procedure qualification using one base metal within a P-Number grouping is also qualified to weld any other metal within the same P-Number grouping regardless of tensile strength?

Reply (6): Yes, again provided that a proper WPS is written to cover the usage, and if the use is compatible with the design of the intended application. For instance, for the procedure cited in Question (1), if the design is based on the base metal and weld metal both meeting 70,000 psi minimum tensile strength, the electrode specified in the WPS should generally be E-7018-A1 (of SFA-5.5), F-No. 4, A-No. 2, as this electrode is capable of meeting the 70,000 psi minimum tensile strength after stress relieving, whereas the E7018, F-No. 4, A-No. 1 (of SFA-5.1) may not be. Similarly, the other welding variables may also be of importance, such that the Manufacturer must select and define in his WPS the conditions to be used, and these be supported by one or more PQR's within the limits of the essential variables. The Manufacturer is responsible for these, and they shall be available for reference by the Authorized Inspector. Standard Designation: Edition/Addenda:


Record Number:


BPV Section IX Section IX, Weld Metal Deposit Analysis as a Variable for Welder Performance Qualification for Gas Tungsten-Arc Welding, QW-356 07/10/1979 BC-79-46 IX-79-52

Question(s) and Reply(ies): Question: In QW-356 (GTAW) of Section IX, no reference is made to weld metal analysis (as classified by A-Numbers) as being an essential variable. Does this mean that a welder may qualify with one F-No. 6 electrode and automatically be qualified for the use of all other F-No. 6 electrodes (regardless of A-Number designation) provided all the other essential variables of QW-356 are satisfied and provided the initial test conditions conform to the requirements set forth in QW-310.4 (for carbon steel bare wire) or QW-310.5 (for stainless steel bare wire)? Reply: The reference to QW-310.4 for carbon steel bare wire is not correct. QW-310.4 permits substitution for plate or pipe materials under various conditions for other base materials being joined in the usual Welding Procedure Specification. QW-310.5 states that a performance qualification test must be made (whose weld deposit conforms to A-No. 8 or A-No. 9) to use these filler metals in production welding. This qualification will also qualify for all other F-No. 6 electrodes but not vice versa.



BPV Section IX Section IX, Revision of Qualification Forms When Related Forms are Changed. QW-482 and QW-484


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Date Issued:

07/11/1979


IX-79-53

Record Number:

BC-78-673

Question(s) and Reply(ies): Question (1): A welder is qualified using a qualified Welding Procedure Specification (WPS), and a Welding Performance Qualification (WPQ) Form QW-484 is filled out with the required data including the weld variables, test data, and the WPS used. At a later date, the WPS referenced on the WPQ Form is revised for a variable change which is not an essential or nonessential variable for performance qualification. Must the revised WPS number be added to the WPQ Form QW-484? Reply (1): No.

Question (2): Using the same conditions as Question (1), except, at a later date, the WPS referenced on the WPQ Form QW-484, is revised for a variable change which is an essential variable for performance qualification. Is it required to add the revised WPS number on the WPQ Form QW-484? Reply (2): The variables affecting the qualification of welders and welding operators are contained in Article III. While a WPS contains variables which are required for performance qualification, the welder or welding operator may weld only within the limits of the variables to which previous qualifications have been accepted. That is, a WPS may list other positions beyond those in which a welder is qualified. The welder is limited to those positions previously qualified unless new performance qualifications are performed for additional positions. Question (3): A welder is qualified using an already-qualified WPS, and a WPQ Form is completed with the required data including the welding variables, test data, and the WPS used. The welder's qualification range happens to cover several additional qualified WPS's that will be used in Code construction. Is it required to fill out a WPQ Form for each WPS the welder will be using, even though no performance qualification variables have been changed? Reply (3): No. Standard Designation: Edition/Addenda:


Record Number:


BPV Section IX Section IX, Brazing Procedure Qualification Temperature Requirements, QB-404.1 07/12/1979 BC-78-789 IX-79-54

Question(s) and Reply(ies): Question: Is it acceptable to write a Brazing Procedure Specification with a brazing temperature range outside of the range listed in QB-432?

Reply: Yes, as long as this Brazing Procedure Specification is supported by an appropriate Brazing Procedure Qualification Record.


BPV Section IX


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Section IX, Clarification of Welder Variables, QW-350

Record Number:

BC-79-231

Date Issued:


07/12/1979 IX-79-55

Question(s) and Reply(ies): Question: A welder has been qualified using GTAW to weld base metals with a consumable insert and a filler metal having a specific A-Number and F-Number. Is this welder also qualified to weld, using GTAW, these same base metals with the same consumable insert and a filler metal having a different A-Number but the same F-Number? Reply: Yes.



BPV Section IX


Section IX, Regarding Performance Qualification Specimens, QW-452

Record Number:

BC-79-297

Date Issued:


07/12/1979 IX-79-56

Question(s) and Reply(ies): Question: In order to fulfill the requirements of QW-452 for an unlimited maximum thickness qualification for pipe, a welder must weld a test specimen of 3/4 in. or over. Is this reference to a thickness of 3/4 in. the actual measured minimum thickness required at the weld joint?

Reply: No, a standard size pipe with a nominal pipe wall thickness of 3/4 in. or over, as listed in the applicable SA pipe specification in Section II, may be used.



Record Number:


BPV Section IX Section IX, Qualification of Welding Operators by Radiographic Examination, QW-305.1 07/12/1979 BC-79-304 IX-79-57

Question(s) and Reply(ies): Question: Two welding operators are required to weld pipe due to the inaccessibility of the joint. QW-305.1 requires that the first production weld examined by radiography be at least 3 ft long. If each welding operator welds only half the joint, can this 3 ft length be obtained by more than one weld? Reply: Yes.

Question: Do the qualified thickness ranges of QW-452 apply to QW-302.2 as well as QW-302.1? Reply: Yes.


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Record Number:


BPV Section IX Section IX, Postweld Heat Treatment of a Combination of Welding Processes 07/13/1979 BC-79-226 IX-79-58

Question(s) and Reply(ies): Question: Can postweld heat treatment be performed without requalification on a weld partially completed in accordance with a WPS qualified without postweld heat treatment and a second WPS completing the weld which has been qualified with postweld heat treatment? Reply: No.



BPV Section IX


Section IX, Usage of Silicon Spray for Joint Preparation

Record Number:

BC-79-286

Date Issued:


07/13/1979 IX-79-59

Question(s) and Reply(ies): Question: May surface preparations to prevent oxidation of the base metal prior to welding or to prevent adherence of unwanted weld droplets to the base metal surface be employed under the rules of Section IX? Reply: QW-410.5 covers initial and interpass cleaning as a nonessential variable to be listed in the Welding Procedure Specification.



BPV Section IX


Section IX, Clarification of QW-404.6 as Relating to Metric Size Electrodes

Record Number:

BC-79-357

Date Issued:


07/13/1979 IX-79-60

Question(s) and Reply(ies): Question: SFA-5.1, 5.5, and 5.4 list nominal electrode diameters in metric sizes that have been converted from English units. However, these converted nominal diameters are not considered standard sizes in some other countries. Does any difference between the sizes listed in Section II Part C and other sizes constitute deviation from Section IX?

Reply: No. The Committee recognizes that in transposing from standard English units to metric units that the diameters will not fall in identical conversions. Where requirements are established on electrode sizes, the next higher English unit conversion of the metric shall be that employed in establishing the acceptance criteria.


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BPV Section IX


Section IX, Clarification of QW-310.4

Record Number:

BC-79-358

Date Issued:


07/13/1979 IX-79-61

Question(s) and Reply(ies): Question: The welding variables, for both procedure and performance qualification, covering GMAW also apply to FCAW. QW-310.4 makes reference to GMAW but does not mention FCAW. Can it be assumed that the reference to GMAW in QW-310.4 also applies to FCAW? Reply: Yes.



BPV Section IX


Section IX, Clarification of the Use of P-Numbers

Record Number:

BC-79-232

Date Issued:


07/18/1979 IX-79-63

Question(s) and Reply(ies): Question: A procedure has been qualified using P-No. 1 Group 1 material welded to itself. Will this qualification also cover P-No.1 Group 1 material welded to P-No. 1 Group 2 material?

Reply: A separate qualification test need not be made unless electron beam welding is used to join the base metals. However, where notch toughness tests are to be performed, supplementary essential vari-ables QW-403.4 and QW-403.5 may require requalification depending upon the process used to join the base metals.



BPV Section IX


Section IX, Interpretation of QW-201.3

Record Number:

BC-79-268

Date Issued:


07/27/1979 IX-79-66

Question(s) and Reply(ies): Question: A welding procedure has been qualified using GMAW on 10 in. x 0.593 in. thick pipe. Another welding procedure using GTAW root and second pass and the balance of SAW on 12 in. x 0.687 in. pipe has been qualified. The thickness of the weld deposits are GMAW 0.56 in., GTAW 0.187 in., and SAW 0.5 in. In reference to QW-201.3 and the above two qualified welding procedures, may a production weld be made using the GMAW process for root pass and the SAW process for completion and what would the thickness limits be? Reply: A production weld may be made using the two qualified welding qualifications with a GMAW process for the root pass and SAW process for


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completion. It is assumed in this reply that the only variables to be considered are the thickness limitations with all other requirements of essential variables being the same as those recorded in the PQR. The GMAW process may be used for the root pass providing it is a minimum of 3/16 in. thick with a maximum of 2T, where T is the thickness of the deposit weld metal. This also applies to the thickness limits in the SAW process. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Definition of the Word "Electrode" as Used in QW-282.4

Record Number:

BC-79-282

Date Issued:


07/27/1979 IX-79-67

Question(s) and Reply(ies): Question: When employing the PAW process, what is the interpretation of the word electrode in QW-282.4? Reply: The term electrode in QW-282.4 when applied to PAW process refers to the tungsten electrode used in that process.



BPV Section IX


Section IX, Regarding Semi-Automatic Welding

Record Number:

BC-78-662

Date Issued:


07/30/1979 IX-79-68

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 process within 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. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Clarification of QW-322

Record Number:

BC-79-370

Date Issued:



07/30/1979 IX-79-69


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Question: During the last month of each calendar quarter (i.e. March, June, September, and December), a check is made to determine if each of the welders employed used each process for which they are qualified during that three month quarter. Is the intent of QW-322 of Section IX served if we thereby establish those welders, who have used a particular process, as qualified to continue welding for the next calendar quarter with that process? Reply: Yes. Standard Designation: Edition/Addenda:


Record Number:


BPV Section IX Section IX, Regarding Procedure Qualification Record Information Recording Requirements 08/02/1979 BC-78-783 IX-79-71

Question(s) and Reply(ies): Question (1): QW-201.2 states that a PQR must record the "specific facts" used in qualifying a WPS. What defines to what detail "specific facts" must be recorded? Reply (1): QW-200.2 states "The PQR form shall list the actual variables used within the limits of a narrow range, rather than the full range of variables allowed. A manufacturer may include all additional information he may consider helpful, such as the nonessential variables, but is only required to record the essential variables used."

Question (2): What rules apply to the use of PQR's from an earlier WPS to support a new WPS?

Reply (2): A new WPS may be written and may be supported by an already qualified PQR, without any change or revision to the PQR. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX. Clarification Regarding QW-201.1

Record Number:

BC-79-285

Date Issued:


08/02/1979 IX-79-72

Question(s) and Reply(ies): Question: QW-402.1, Groove Design, is a nonessential variable for all processes except EBW and Stud welding processes. When making repairs to a weld, is it necessary to describe in the WPS the cavity developed in preparation for such repairs?

Reply: No. The intent of QW-402.1 is to include or reference in the WPS the groove design employed in preparing the base materials for joining into a weldment. Repairs are considered a part of the welding operations.

Standard Designation:

BPV Section IX


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Edition/Addenda:


Record Number:


Section IX, Regarding the Preparation of a Procedure Qualification Record, QW-100 and QW-200 08/02/1979 BC-79-374 IX-79-73

Question(s) and Reply(ies): Question (1): Does QW-100.1 require the PQR to identify the actual amperage and voltage used and prohibit the PQR from showing voltage and amperage ranges when voltage and amperage are nonessential variables? Reply (1): No. Voltage and amperage ranges may be recorded within the limits of a narrow-range, rather than the full range of the variables allowed. Question (2): QW-200.2 states, "The PQR form shall list the actual variables used within the limits of a narrow range rather than the full range of variables allowed. A manufacturer may include all additional variables he may consider helpful, such as the nonessential variables, but is only required to record the essential variable used." Does this permit the manufacturer to leave the PQR blank where nonessential variables are concerned or to fill in the nonessential variables in any manner considered to be helpful at the manufacturer's option? Reply (2): A manufacturer is only required to list the essential variables on the PQR; any further information may be included at his option. Question (3): Must every WPS supported by a given PQR be listed on that PQR? Reply (3): No. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Regarding Thicknesses Qualified, QW-403.6

Record Number:

BC-78-664

Date Issued:


08/03/1979 IX-79-74

Question(s) and Reply(ies): Question (1): Does QW-403.6, which states "For thicknesses less than 5/8 in. (16mm) 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): Where the test coupon is 5/8 in. or over in thickness, the minimum thickness qualified is 5/8 in.

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): The minimum thickness qualified is 5/8 in.


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BPV Section IX


Section IX, Regarding Clarification of QW-200.1

Record Number:

BC-79-376

Date Issued:


08/03/1979 IX-79-75

Question(s) and Reply(ies): Question: Is any further information, other than that which appears on Form QW-482, required for a welding procedure specification (WPS)?

Reply: The Form shown in QW-482 is a suggested format for the required information; a WPS may be presented in any form as long as every essential and nonessential variable covered by QW-252 through QW-282 is presented. Any additional information is not required, but may be attached to the WPS at the option of the manufacturer.



Record Number:


BPV Section IX Section IX, Regarding the Use of Material for Performance Qualification, QW-310.4 08/08/1979 BC-79-373 IX-79-76

Question(s) and Reply(ies): Question: Welders must be qualified for the deposit of and joining of several different types of material as described in QW-310.4. Would it be acceptable, for the qualification of welders or operators, to substitute for P-No. 1 any carbon steel material with not more than 70,000 psi specified tensile strength and the following chemistry limits: C Mn P S Si Other 0.30% 1.35% 0.05% 0.05% 0.15%/0.50% 0.75% (Single values are maximum)

Reply: No, the material must be to a specification listed under P-No. 1 (see QW-310.4). Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Clarification of QW-403.10

Record Number:

BC-79-439

Date Issued:


08/08/1979 IX-79-77

Question(s) and Reply(ies): Question (1): The short circuiting transfer mode of GMAW is used to deposit the first two weld passes in a weld that is subsequently filled with the FCAW. For thickness qualification purposes, should the thickness deposited by each mode be specified on the PQR?


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Reply (1): Yes.

Question (2): If the weld joint were on 1 in. material thickness and ¼ in. deposited with GMAW-S mode, would this require definitive limits similar to multiprocess joints (e.g., would GMAW-S mode be limited to its specific range, 1.1 times its deposited thickness per QW-403.10; in this case, 0.275 in.)? Reply (2):Yes. Standard Designation: Edition/Addenda:


BPV Section IX


Section IX, Regarding Qualification of Fillet Weld Procedures, QW-202.2

Record Number:

BC-79-440

Date Issued:


08/08/1979 IX-79-78

Question(s) and Reply(ies): Question: Is it permissible to conduct a fillet weld procedure qualification test as shown in QW-462.4(a) on ¼ in. plate and be qualified for all fillet sizes and all plate thicknesses, providing the remaining essential variables are the same? Reply: Yes.



BPV Section IX


Section IX, Regarding the Preparation of a WPS, QW-200

Record Number:

BC-79-442

Date Issued:


08/09/1979 IX-79-79

Question(s) and Reply(ies): Question (1): Is it permissible to write a WPS listing options for essential variables (e.g., PWHT/ non-PWHT, a range of F-Numbers, etc.) if each of these options is supported by an appropriate PQR? Reply (1): Yes.

Question (2): Is it permissible to specify changes in nonessential variables as long as they are also used on separate supporting PQR's? Reply (2): Section IX permits changes in nonessential variables without requalification; therefore no supporting PQR's are required.

Question (3): To allow changes in nonessential variables and to document their use, should they be listed on the PQR also? Reply (3): No. Standard Designation: Edition/Addenda:

BPV Section IX



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Subject Description: Date Issued:

Record Number:


Section IX, Regarding Clarification of Quantity Ranges in Essential Variables 08/22/1979 None

IX-79-80

Question(s) and Reply(ies): Question (1): Phrases similar to "a change in the specified.... "appear in several sections of QW-281, specifically QW-281.2(e), QW-281.2(f), QW281.4(f), QW-281.4(g), and QW-281.4(i). In these cases, does the use of the word "specified" mean a range or parameter stipulated on the WPS which must be met during qualification and the actual value found during qualification (which may be different from the quantity stated on the WPS reported on the PQR, or does it mean the actual value qualified and reported on the PQR which in turn determines the limit of a range or parameter on the WPS? Reply (1): The above mentioned phrases refer to changes made to the WPS. Any WPS written and supported by a particular PQR must remain within the parameters established in that PQR or be requalified. Question (2): Is the statement, "A change in the specified postweld heat treatment temperature" in QW-281.2(f), intended to imply a range of temperature? If a range is implied, is it permissible to use ranges specified in other sections of the Code or applicable specifications where such specified ranges exist? Reply (2): It is permissible to use ranges specified in other Book Sections (e.g., UHT-56 of Section VIII, Division 1, and PW-39 of Section I).

Copyright © 2016 by the American Society of Mechanical Engineers. No reproduction may be made of this material without written consent of ASME


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