asme ix interpretations
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ASME SECTION IX INTERPRETATIONS
NOTE: THESE INTERPRETATIONS ARE FOR ASME COMMITTEE USE ONLY.
THEY ARE NOT TO BE DUPLICATED OR USED FOR OTHER THAN ASME
COMMITTEE BUSINESS.
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THIS DOCUMENT. PLEASE REVIEW THE ACTUAL INTERPRETATION FOR THE
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Interpretation: IX-04-03Subject: QW-407.1 , Postweld Heat Treatment
Date Issued: September 15, 2003
File No: 03-1212
Question (1): May a procedure qualification record subject to the variable QW-407.1(a) which
qualified P-No. 8 to P-No. 8 with no PWHT support a WPS with PWHT?
Reply (1): QW-407.1(a) does not apply to P-No. 8 materials. See QW-407.1(b).
Question (2): Would application of controlled and monitored heat to the weld and surrounding
area for the correction of distortion in P-No. 8 material be considered a PWHT operation?
Reply (2): See QW-407.1(b).
Note: This interpretation originally appeared in Volume 54. The “P8” has been corrected by
Errata to read “P-No. 8”.
Interpretation: IX-04-04Subject: QW-401.3 Supplemental Essential Variable
Date Issued: September 15, 2003
File No: 03-1246
Background: A WPS is supported by three PQRs. Two PQRs are recorded on 12 mm and 28.5mm thick coupons using tensile, bend, and impact testing specimens. A third PQR was made
using 5 mm thick plate using the same welding parameters, but only impact specimens were
tested.
Question (1): May these PQRs be combined to support a WPS for welding 2.5 mm through 57
mm material requiring notch toughness testing?
Reply (1): No.
Question (2): May these three PQRs be combined to support welding base metal thicknesses
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of 4.8 through 57 mm with or without notch toughness?
Reply (2): Yes.
Note: This interpretation originally appeared in Volume 54. The “WP” in Question (1) has
been corrected by Errata to read “WPS”.
Interpretation: IX-04-08Subject: QW-200.4, Combination of Welding Procedures
Date Issued: April 1, 2004File No: 03-1770
Background: A combination weld process PQR was qualified using the GTAW for the root
pass, SMAW and SAW.
Question: May this PQR support a WPS for welding with only one or two of the processes
shown on the PQR?
Reply: Yes, provided the following are met:
a) The remaining essential, nonessential and supplementary essential variables, when
applicable, are applied.b) The base metal and deposited weld metal thickness limits of QW-451 are applied.
Interpretation: IX-04-09Subject: QW-403.9, Base Metal Thickness
Date Issued: April 1, 2004
File No: 04-65
Background: An EGW procedure was qualified on 3/8 in. thick base material completing the
weld joint in one (1) single pass.
Question: Is the WPS qualified to make a weld deposit greater than 1/2 in., in one pass, in basemetal greater than 1/2 in. in thickness?
Reply: No.
Interpretation: IX-04-10Subject: QW-100.3 and QW-202.2, Procedure Qualification Record Time Limits
Date Issued: June 10, 2004File No: 04-601
Question: Is there a time limit on the validity of a PQR?
Reply: PQRs always remain valid, but may only be used to support WPSs, provided they meet
the requirements of the 1962 or later Edition of ASME Boiler and Pressure Vessel Code Section
IX. See QW-100.3.
Interpretation: IX-04-11Subject: QW-451.1, Procedure Qualification Thickness Limits and Test Specimens and
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QW-202.4, Dissimilar Base Metal Thicknesses
Date Issued: December 22, 2004
File No: 04-599
Background: A procedure qualification test coupon using the same P-Number material and
consisting of two plates of different thicknesses are welded together, where the thicker of the
two plates (T2 = 1-1/2” thick) has been tapered on a 4:1 taper down to the thinner plate
thickness (T1 = 1” thick).
Question (1): Does this test coupon qualify the WPS for a base metal thickness range of 3/16”
to 8”?
Reply (1): See Interpretation IX-86-43, Question (2).
Background: A procedure qualification test coupon using the same or different P-Number
materials and consisting of two plates of different thicknesses, T2 = 1-1/2” thick and T1 = 1”thick welded with a single process. The thicknesses meet on the same plane with neither plate
being tapered. The joint is welded in accordance with the sketch below.
Question (2): Does this test coupon qualify the WPS for both base metals for a thicknessrange of 3/16” to 8” on both sides of the weld joint?
Reply (2): Yes.
Question (3): Does this test coupon qualify the WPS for both base metals of different P
Numbers for a thickness range of 3/16” to 8”?
Reply (3): No. QW-202.4 requires both base metal thicknesses be in accordance with QW-
451.1. Base metal T1 is qualified 3/16” to 2” and base metal T2 is qualified 3/16” to 8”,
except as permitted by QW-202.4(b)(1).
Interpretation: IX-04-12Subject: QW-409.1, Electrical Characteristics, Heat Input
Date Issued: December 22, 2004
File No: 04-1013
Question (1): Does QW-409.1 require that the highest heat input, to be recorded on the PQR, becalculated on the parameters used at the location where the HAZ impact specimens are removed?
Reply (1): No.
Question (2): GTAW is a non-consumable electrode welding process that would record zero
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for the “per unit length of electrode” in QW-409.1(b). Therefore, can the weld volume method
detailed in QW-409.1 be used to control the heat input for a non-consumable electrode welding
process such as GTAW?
Reply (2): See Interpretation IX-92-40.
Interpretation: IX-04-13Subject: QW-322.2, Renewal of Qualification
Date Issued: December 22, 2004
File No: 04-1457
Background: A welder has been qualified for the GMAW process (short circuiting
transfer mode). The required mechanical bend tests were performed and found to be acceptable.
The welder did not weld with this process during the following six-month period, resulting in
expiration of the qualification.
Question: May a welder’s qualification be renewed by radiographing a production weld
performed with the GMAW process (short circuiting transfer mode)?
Reply: No. See QW-322.2(a).
Interpretation: IX-04-14Subject: QW-200.2, Procedure Qualification Record and QW-409.1, Electrical
Characteristics, Heat Input
Date Issued: December 22, 2004
File No: 04-1592
Question (1): Procedure Qualification tests were conducted with notch toughness testing.
When documenting the PQR with actual variables (Amps, Volts, Travel Speed) that were
recorded during welding of the test coupon, is it required that a single value be recorded for these
variables in the PQR?
Reply (1): No. See QW-200.2(b).
Question (2): Must the volts, amps and travel speed used to calculate heat input for each
process per QW-409.1 be measured in the same weld pass or unit length of weld?
Reply (2): Yes.
Interpretation: IX-04-15Subject: QW-407.2, Base Metal Thickness Qualification and QW-407.2, PWHT
Temperature and Time Range
Date Issued: December 22, 2004
File No: 04-1595
Question (1): Will a procedure qualification test coupon on 1.5 in. thick P-No. 1, Gr. 2 material
and post weld heat treated at 1100 deg. F. for 1.5 hours with supplementary essential variable
requirements met, support a WPS with supplementary essential variable requirements for
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production welding on 8 in. thick P-No. 1, Gr. 2 material that is PWHT at 1100 deg. F. for 3.5
hours?
Reply (1): No.
Question (2): Based on the conditions stated in Question 1, could the PWHT time on the 8 in.
thick weldment be increased to 4 hours and 10 minutes at 1100 deg. F. and still be in compliance
with Code requirements?
Reply (2): No.
Interpretation: IX-92-69Subject: QW-409.1, Electrical Characteristics
Date Issued: May 19, 2005
File No: 05-635
Note: Interpretation IX-92-69 has been withdrawn
Interpretation: IX-04-16Subject: QW-403.5, Qualification of Dissimilar Group Number Base MetalsDate Issued: March 8, 2005
File No: 04-1418
Question (1): A PQR is qualified with impact testing using API 5L X56, which is an S-No.1,
Group 2 material. Does that PQR support a WPS for impact tested welding API 5L X52 and X46
which are S-No.1, Group 1 materials?
Reply (1): No.
Question (2): Does a PQR qualified with impact testing conducted using an unassigned material
welded to an S-No.1, Group 2 material support a WPS for welding the same unassigned materialto S-No.1, Group 1 material?
Reply (2): No.
Interpretation: IX-04-17
Subject: QW-409.8, QW-256, SFA Specifications, GTAW Electrode CharacteristicsDate Issued: March 8, 2005
File No: 05-24
Question: May current levels outside the range of SFA 5.12 Table AI for specific tungstenelectrode diameters be specified in a WPS in accordance with Section IX?
Reply: Yes.
Interpretation: IX-04-18Subject: QW-200.4(b), Combination Procedure Qualification Records
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Date Issued: March 8, 2005
File No: 05-25
Background: A combination GTAW and SMAW WPS is supported by two PQRs. PQR A iswelded with SMAW to join 38 mm (1-½ in.) thick plates with 38 mm (1-½ in.) of SMAW
deposit. PQR B is welded with GTAW and SMAW to join 13 mm (½ in.) thick plates, with 3 mm
(1/8 in.) of GTAW deposit, and 10 mm (3/8 in.) of SMAW deposited.
Question (1): Do PQRs A and B qualify the combination WPS for a base metal thickness range
of 5 mm (3/16 in.) to 200 mm (8 in.) when impact testing is not required?
Reply (1): Yes.
Question (2): Do PQRs A and B qualify the combination WPS for a maximum deposited weld
metal thickness of 6 mm (¼ in.) for the GTAW process and 200 mm (8 in.) for the SMAW
process?
Reply (2): Yes.
Question (3): When impact tests are performed for both PQRs with acceptable results, do
PQRs A and B qualify the combination WPS for a base metal thickness range of 13 mm (½ in.) to
200 mm (8 in.) when impact testing is required?
Reply (3): Yes.
Interpretation: IX-04-19
Subject: QW-404.36, Filler Metals, Testing of Recrushed SlagDate Issued: March 8, 2005
File No: 05-26
Question: Does QW-404.36 require that each batch or blend of recrushed slag, as defined in
SFA-5.17, be tested in accordance with Section II, Part C regardless of the source of slag?
Reply: Yes.
Interpretation: IX-04-20Subject: QW-407.1, Welding Procedure Specification, Postweld Heat Treatment
Date Issued: March 8, 2005
File No: 05-293
Question: A WPS for joining P-No.4 to P-No.4 specifies that the PWHT be performed at
1125 deg. F +/- 25 deg. F, which is below the lower transformation temperature for the material.
May this WPS be revised to specify a PWHT performed at 1225 deg. F +/- 25 deg. F, which isalso below the transformation temperature, without requalification of the procedure?
Reply: Yes.
Interpretation: IX-04-21Subject: QW-184 and QW-322.1, Production Welds, Revoking Welder Qualifications
Date Issued: May 19, 2005
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File No: 05-528
Question (1): A welder qualified for fillet welds by a qualification test on a plate groove weld is
required to weld a fillet weld of 3/8 in. (10 mm) leg on a nozzle to shell weld. Is the welderrequired to produce fillet welds with legs having a maximum difference in length of 1/8 in. (3.2
mm) as per QW-184?
Reply (1): No, QW-184 does not apply to production welds.
Question (2): The same welder, qualified as per previous question, produces fillet welds with one
leg size twice the size of the other (3/8 versus 3/4 in.). Is this cause for questioning his/her abilityto weld within the qualification parameters and revoke his/her qualification for fillet welds, in
terms of QW-322.1(b)?
Reply (2): Section IX does not establish criteria for revoking welder qualifications.
Interpretation: IX-04-22Subject: QW-407.4, Qualified Thickness Range when Exceeding the PWHT Upper
Transformation Temperature
Date Issued: May 27, 2005
File No: 04-1301
Question: When variable QW-407.4 applies per QW-250 for test coupons with postweld heat
treatment exceeding the upper transformation temperature is the maximum thickness qualified
1.1 times the thickness of the test coupon for ferrous P number materials; P-No.1 through P-No.7
and P-No. 9A through P-No11B?
Reply: Yes
Interpretation: IX-04-23Subject: QW-211 and QW-310.2, Procedure Qualification for Groove Welds with
Backing (2004 Edition)
Date Issued: August 18, 2005File No: 05-784
Background: A performance qualification test is performed using solid round bar machined to
42.20 mm (1.66 in.) O.D. with a machined circumferential weld groove that is 14.6 mm (0.575
in.) deep and has integral backing. Welding is performed in the 6G test position with a single
welding process. At least three weld layers are deposited. The test coupon will be subjected to
radiographic examination.
Question: May the test coupon described above be used for a performance qualification test in
the 6G position welded with a single process to qualify for all position welding of unlimited weld
metal thickness with backing and for all diameters 25 mm (1 in.) O.D. and greater?
Reply: Yes, however, multiple test coupons are required to provide a minimum weld length of
150 mm (6 in.) for radiographic examination and the radiographic examination requirements of QW-191 are met.
Interpretation: IX-04-24
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Subject: QW-461.9, Performance Qualification – Position and Diameter Limitations
(2004 Edtion)
Date Issued: November 15, 2005
File: 05-1195
Question: A welder was qualified on pipe 5/8” thick in the 6G position using the GTAW process
without backing for his root pass, and SMAW with F4 filler metal to complete the joint. He is
also qualified to weld using SMAW on plate in the 1G position without backing.
May this welder deposit a root pass using SMAW with F4 filler in the 6G position without
backing?
Reply: No.
Interpretation: IX-04-25Subject: QW-151.3 and QW-451, Tension Test Requirements for Turned Specimens
(2004 Edition)
Date Issued: November 17, 2005
File No: 05-1404
Background: A test coupon of 1 1/8” thickness was welded. Only two (2) turned 0.505 inchdiameter tension specimens were prepared and tested. The test results were acceptable for the
specimens tested.
Question (1): Do the tension tests performed satisfy the requirements of QW-150 and QW-451?
Reply (1): No.
Question (2): Are the requirements of QW-150 and QW-451 satisfied if the WPS and this PQR
supports is limited to a base metal thickness range of 3/16 to 2 inches instead of a base metal
thickness range of 3/16 to 2-1/4 inches that would have been permitted had a sufficient number of
tension specimens been tested?
Reply (2): No.
Interpretation: IX-04-26
Subject: QW-201, Manufacturer’s or Contractor’s Responsibility (2004 Edition)Date Issued: February 22, 2006
File No: 05-1196
Background: Two independent companies A and B form a Limited Liability Partnership (LLP) to
perform work requiring ASME Section I Code Stamp. The LLP has obtained valid ASME
Certificates of Authorization. Each company also has valid, existing ASME Certificates of
Authorization. The organization effective operational control of welding procedure qualification
is described in each of the partner’s Quality Control System Manuals and the LLP’s Quality
Control System Manual.
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The welding procedure qualification tests and production welding are under the full supervision
and control of the same individual representing both the LLP and company A.
Question: May the LLP use PQR’s qualified by company A after the formation of the LLP?
Reply: Yes.
Interpretation: IX-04-27Subject: Units of Measurement
Date Issued: February 22, 2006File No: 05-1215
Question (1): Is it acceptable to maintain welder performance qualification records in SI units,
with a conversion table as part of the welding manual to ensure that qualification limits are not
exceeded?
Reply (1): Yes. Code Case 2523 provides information about when such conversions are
required and the requirements for performing such conversions.
Question (2): Is it acceptable to maintain welding procedure specifications that are dual
dimensioned with SI units primary and US Customary units in parenthesis, with a conversiontable as part of the welding manual to ensure that qualification limits are not exceeded?
Reply (2): Yes. Code Case 2523 provides information about when such conversions are
required and the requirements for performing such conversions.
Interpretation: IX-04-28Subject: QW-405.2, Welding Position (2004 Edition)
Date Issued: June 21, 2006
File No: 06-323
Question (1): If a Stud Welding Procedure Qualification is performed in the 4S position does the
same procedure qualification qualify for the 1S position?
Reply (1): No.
Question (2): If a Stud Welding Procedure Qualification is performed in the 4S and 2S position
does the same procedure qualification also qualify for all positions?
Reply (2): No.
Interpretation: IX-04-29Subject: QW-407.1(b), Postweld Heat Treatment
Date Issued: June 21, 2006File No: 06-462
Question: Does QW-407.1(b)(2) address the temperature ranges for stress relieving, stabilizing
and/or solution annealing heat treatments?
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Reply: No, QW-407.1(b)(2) addresses PWHT within a specified temperature range. Section IX
requires the temperature range to be specified on the WPS and the PQR supporting the WPS be
within the specified PWHT temperature range. (See the fourth paragraph of the Introduction.)
Interpretation: IX-01-22RSubject: QW-100.3 and QW-420.1, P-Number Reassignment (2004 Edition)Date Issued: September 11, 2007
File No: 01-679, 04-600
Question: May a previously qualified WPS, written to permit the welding of P-No. 5, Group 1
material to P-No. 5, Group 4 material prior to the establishment of P-Nos. 5A, 5B, and 5C, be
used to weld SA-213 T22 to SA-213 T91 materials?
Reply: Yes, if the WPS is revised to limit the materials qualified for welding to the P- or S-Number(s) and Group number(s) assigned to the specific material(s) originally used for the
procedure qualification test coupon in the applicable edition and addenda of Section IX.
Interpretation: IX-07-01Subject: QW-407.1(b), Postweld Heat Treatment (2004 Edition)Date Issued: February 6, 2007
File No: 06-285
Background: A manufacturer has fabricated multi-convolution bellows of SB-409 UNS
N08800, N08810 or N08811 (P-No. 45), in accordance with ASME Section VIII Div. 1, and
Mandatory Appendix 26, Pressure Vessel and Heat Exchanger Expansion Joints. Although theCode does not require it, the manufacturer performs heat treatment (at 1750 deg. F) subsequent to
completing all welding and forming.
Question: Is the heat treatment described above considered Postweld Heat Treatment
for the purpose of welding procedure qualification in accordance with Section IX, para.QW-407.1(b)?
Reply: Yes.
Interpretation: IX-07-02
Subject: QW-201, Manufacturer’s or Contractor’s Responsibility (2004 Edition)Date Issued: August 17, 2007
File No: 06-912
Background: Three construction companies have participated in a nuclear power plantconstruction project as a consortium contractor. They have a unified Quality Assurance Program
but the consortium does not hold a Certificate of Authorization. Each of the construction
companies holds their own Certificate of Authorization.
Question: Does “two or more companies of different names in an organization” in QW-201
apply
to the consortium described in the background?
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Reply: No.
Interpretation: IX-07-03Subject: QW-409.2, FCAW Mode of Transfer (2004 Edition)
Date Issued: August 17,2007
File No: 07-1041
Question: Does QW-409.2, the transfer mode variable, apply to the flux cored arc welding
process?
Reply: Yes.
Interpretation: IX-07-04 Subject: QW-404.23, Filler Metal Product Form (2007 Edition)
Date Issued: August 17, 2007
File No: 07-1343
Question (1): Is the requirement to document essential variable QW-404.23 satisfied when the
AWS filler metal classification is specified in the WPS and recorded on the supporting PQR?
Reply (1): Yes.
Question (2): Does QW-404.23 require the words “solid wire”, “bare wire” or “flux cored” be
specified in addition to the AWS filler metal classification in the WPS and supporting PQR?
Reply (2): No.
Interpretation: IX-07-05Subject: QW-100.3 and QW-420.1, Change of P-No. as an Essential Variable with
Respect to Reassignment of P-No.5 into P-No. 5A, 5B, and 5C (2004 Edition)
Date Issued: September 11, 2007
File No: 04-600
Background: A welding procedure was qualified in 1975 (without impact testing) for joining P-
No.5 materials, using SA-213-T9 in the PQR test coupon. P-No.5 has since been deleted, and
CrMo materials have been reassigned to P-Nos.5A, 5B, and 5C, with SA-213-T9 being assignedto P-No.5B. It can be demonstrated that SA-213-T9 is now designated as a P-No.5B material.
Question (1): QW-100.3 allows the continued use of welding procedures qualified under previous
Editions and Addenda of the Code without revision to include any variables required by laterEditions and Addenda. Is it the intent of QW-100.3 to allow the use of this WPS to join P-No.5A,
.P-No.5B or P-No.5C materials without requalification when toughness is not a consideration?
Reply (1): No. QW-100.3 applies when later Code Editions and Addenda have added new
variables for a given welding process. While this WPS can be shown to be qualified for welding
P-No.5B materials to each other, it is intended that the WPS be editorially revised to show
applicability of the WPS to the originally qualified materials under the material grouping
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assignment found in the applicable Edition and Addenda of Section IX. See QW-420.1 and QW-
200.2(c).
Question (2): Is it the intent of Section IX that the WPS described above is acceptable for joiningall materials previously assigned P-No.5?
Reply (2): No. Based upon the original PQR, the WPS is qualified only for joining materials
assigned to P-No.5B under the current Section IX rules. See QW-403.13.
Interpretation: IX-07-06Subject: QW-407.1 and QW-407.2, Postweld Heat Treatment (2007 Edition)
Date Issued: December 11, 2007
File No: 07-1708
Background: A weld test coupon for a PQR was welded using P-No. 1, Group 2 plate materialto itself and postweld heat treated at 1110°F - 1130°F (600°C - 610°C) for ten hours. The
PQR documents all supplementary essential variable notch-toughness requirements. Notch-
toughness is required and all qualification ranges are supported by the PQR for production
welds.
Question: Will this PQR support a WPS that specifies a PWHT temperature range below thelower transformation temperature provided the time at temperature does not exceed 12.5
hours?
Reply: Yes.
Interpretation: IX-07-07Subject: QW-404.22, Use of Consumable Inserts (2007 Edition)
Date Issued: February 12, 2008
File No: 08-40
Background: QW-356 lists the essential variables for Welder Performance Qualification for
manual GTAW. QW-404.22, the use of consumable inserts, is an essential variable for
Welder Performance Qualification within QW-356.
An individual performs the following two qualification tests:
1. Groove weld using the GTAW-machine process on a NPS 6 (DN 150) Schedule 40pipe coupon with a consumable insert.
2. Groove weld using the GTAW-manual process on a NPS 6 (DN 150) Schedule 40
pipe coupon with an open root.
Each qualification test is performed independently and welded full thickness by the process used
to make the root weld
Question (1): Is this individual qualified to weld a NPS 6 (DN 150) Schedule 40 pipe groove
weld by making the root weld with the GTAW-machine process with a consumable insert and
then completing the weld using the GTAW-manual process?
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Reply (1): Yes.
Question (2): Is this individual qualified to make non-through wall weld repairs using the
GTAW-manual process to a NPS 6 (DN 150) Schedule 40 pipe groove weld that wasoriginally performed using the GTAW-machine process with a consumable insert?
Reply (2): Yes.
Question (3): Is this individual qualified to make through-wall repairs using the GTAW-
manual process to the root of a NPS 6 (DN 150) Schedule 40 pipe groove weld that was
originally performed using the GTAW-machine process with a consumable insert if the defectremoval results in a repair cavity with an open root?
Reply (3): Yes.
Interpretation: IX-07-08Subject: QW-200.2(c), Changes to PQR (2007 Edition)
Date Issued: February 12, 2008
File No: 08-209
Question (1): Can additional tests and data that are not required by Section IX (i.e., hardnessferrite, corrosion, etc.) be added to a PQR at a later date when the testing was not performed as
part of the original PQR, but followed the conditions of the original qualification?
Reply (1): Yes.
Question (2): If the tests and data noted in Question 1 are added to the PQR, wouldrecertification, including date, be required?
Reply (2): Yes. All changes to a PQR require recertification (including date) by the
manufacturer or contractor per QW-200.2(c).
Interpretation: IX-07-09Subject: QW-401.3 and QW-403.6, Thickness Range Qualified for Impact Testing (2007
Edition)
Date Issued: May 1, 2008
File No: 08-576
Background: A welding procedure qualification was performed on a 1 in. (25 mm) thick test
coupon. Tension and bend tests were performed on the 1 in. (25 mm) plate. A second welding
procedure qualification was performed on a 0.24 in. (6 mm) plate and only impact testing was
performed. All of the essential and supplementary essential variables remained the same exceptfor the coupon thickness.
Question: May the above PQRs be used to support a WPS for materials requiring notchtoughness with a qualified thickness range of 0.1875 in. (5 mm) to 2 in. (50 mm)?
Reply: Yes.
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Interpretation: IX-07-10Subject: QW-201.1
Date Issued: September 18, 2008
File No: 08-1002
Question: Does QW-201.1 allow maintaining effective operational control of PQRs and WPSs
under different ownership than existed during the original procedure qualification when the
ownership of one company has been transferred more than once?
Reply: Yes.
Interpretation: IX-07-11Subject: QW-301.2, Qualification Tests
Date Issued: November 26, 2008
File No: 08-1607
Question: Does QW-301.2 require that a person making adjustments to the welding equipment
settings, under the supervision and control of the welder or welding operator performing the weld,
also be a qualified welder or welding operator?
Reply: No.
Interpretation: IX-07-12Subject: QW-466.1
Date Issued: December 3, 2008
File No: 08-1161
Question: In Table QW-466.1, when the material P-No. is assigned as “All Others” and the
material specification of the ASME Code Section II does not have any requirements for reporting
elongation, is the manufacturer limited to performing a base metal tension test to determine the
proper test jig dimensions A, B, C, and D of Table QW-466.1?
Reply: No.
Interpretation: IX-07-13Subject: QW-483 and QW-484
Date Issued: December 3, 2008File No: 08-1464
Question (1): May the manufacturer or contractor, subcontract the certification of procedure or
performance qualification records?
Reply (1): No.
Question (2): Does Section IX specify the qualifications for the individuals who certify
procedure or performance qualification records?
Reply (2): No.
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Interpretation: IX-07-14Subject: QW/QB-422
Date Issued: June 4, 2009
File No: 09-486
Question: Does the assignment of P-No. 8, Group No. 3 to SA-479, Type XM-19, UNS S20910
include all three (3) of the heat treatment conditions (annealed, hot-rolled and strain-hardened)
specified by SA-479?
Reply: Yes.
Interpretation: IX-07-15Subject: Article III - QW-302.1 & QW-302.2
Date Issued: August 18, 2009
File: 09-567
Question (1): If radiographic examination per QW-302.2 is done for qualification of 2 welders on
a single pipe coupon welded in the 6G position, must each welder complete the entire
circumference of the pipe coupon?
Reply (1): Yes.
Question 2: If mechanical testing per QW-302.1 is done for qualification of 2 welders on a single
pipe coupon welded in the 6G position, must each welder complete the entire circumference of
the pipe coupon in order to remove the required bend specimens in accordance with QW-463.2(d)
or QW-463.2(e)?
Reply (2): Yes.
Interpretation: IX-07-16Subject: QW-300.2(b)Date Issued: August 18, 2009
File: 09-747
Question: Is the manufacturer or contractor required to provide full supervision during the
performance qualification testing, so that issues such as the essential variables and inspections
during the test can be verified and satisfied for each welder or welding operator qualified?
Reply: Yes.
Interpretation: IX-07-17Subject: QW-304 & QW-355 - FCAW
Date Issued: August 18, 2009
File: 09-1012
Question (1): May radiographic examination meeting the requirements of QW-304 be used to
qualify a welder using the Flux-Cored Arc Welding (FCAW) process, provided the transfer mode
is not the short circuiting mode?
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Reply (1): Yes.
Question (2): When qualifying a welder in accordance with the essential variables listed in QW-355 for the Gas Metal-Arc Welding (GMAW) process and the requirements of QW-304 are met,
is the welder also qualified for the Flux-Cored Arc Welding (FCAW) process if the essential
variables are unchanged?
Reply (2): Yes.
Interpretation: IX-07-18Subject: QW-100.3 and QW-420.1
Date Issued: November 12, 2009
File: 09-490
Background: A later Edition /Addenda of Section IX assigns a P-number different from that
assigned by the Edition/Addenda of Section IX that was in effect at the time of qualification.
Question (1): Is it required that the WPS be revised or a new WPS be written to identify the new
P-number when the applicable code edition/addenda lists the material under the new P-number?
Reply (1): Yes.
Question (2): Is it required that the WPS be revised or a new WPS be written to identify the new
P-number when the applicable code edition/addenda lists the material under the old P-number?
Reply (2): No
Question (3): Is it required that a supporting PQR be amended to show the new P-number
assignment?
Reply (3): No.
Question 4: May a supporting PQR be amended to show the new P-number assignment?
Reply (4): Yes.
Question (5): May a supporting PQR be amended to show both the old and the new P-number
assignments?
Reply (5): Yes.
Background: A later Edition/Addenda of Section IX assigns a F-number different from thatassigned by the Edition/Addenda of Section IX that was in effect at the time of qualification.
Question (6): Is it required that the WPS or PQR be amended to reflect the new filler metal F-No.assignment?
Reply (6): No.
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Question (7): May the WPS or PQR be amended to reflect the new filler metal F-No.
assignment?
Reply (7): Yes.
Interpretation: IX-07-19Subject: QW-452.5 & QW-181.2.1Date Issued: December 2, 2009
File: 09-1596
Background: A fillet weld performance qualification test is performed using a production
assembly mockup.
Question: Must a welder or a welding operator using a production mockup assembly be qualified
for a change in fillet size, base material thickness, or configuration of the mockup?
Reply: Yes.
Interpretation: IX-07-20Subject: QW-452.5Date Issued: December 11, 2009
File: 08-210
Question: Is it the intent of QW-452.5 to permit welder or welding operator fillet weld
performance qualification testing to be conducted using test coupon thicknesses greater than 3/8”
thick?
Reply: Yes.
Interpretation: IX-07-21Subject: QW-250
Date Issued: December 31, 2009
File: 09-588
Question (1): Is it the intent of the Code that Variables QW-403.6, QW-406.3, QW-409.1, QW-
410.9, and QW-410.10 apply when specified in QW-250 for P-No. 10H materials?
Reply (1): No.
Question (2): Is it the intent of the Code that Variable QW-407.4 applies when specified in QW-
250 for P-No. 10H materials?
Reply (2): Yes.
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