Welder Performance Qualification Test (ASME IX)
When welder is required re-qualification?
Who has not welded greater than 6 months as QW-322.1.
Any change of essential variable listed for each process as QW-416.
How to renewal of qualification?
Welder shall conduct one test coupon/product on either plate or pipe, of any material or thickness as QW-322.2 (a).
Welder prepares the PQR, does he pass welding performance as QW-350?
Yes, who is also qualified within the limits of performance qualification, read more QW-301.2.
Renewal of qualification shall conduct only test coupon/product on any process, or material, etc.
Revocation of qualification shall require to re-qualification as QW-301.
Recommend to prepare the test coupon (groove weld)
Preparation for testing
- A qualified welding procedure must available and approval.
- Organization responsibilities as QG-106.2.
- Base material and welding consumable must available.
- If invitation of classification society to endorse documents, welding consumable’s MTC and WPS must available for review and approved by class rules..
- Weld groove preparation are accordance with approval WPS.
Welding consumables most use
ASME SFA 5.1: Carbon steel electrode for SMAW.
ASME SFA 5.4: Stainless steel electrode for SMAW.
ASME SFA 5.5: Low alloy steel electrode for SMAW
ASME SFA 5.9: Bare stainless steel for welding electrode and rod.
ASME SFA 5.17: Carbon steel electrode and fluxes for SAW.
ASME SFA 5.18: Carbon steel electrodes and rods GTAW, GMAW.
ASME SFA 5.20: Carbon steel electrode for FCAW.
ASME SFA 5.22: Stainless steel electrode for FCAW.
ASME SFA 5.23: Low alloy steel electrode and fuxes for SAW.
ASME SFA 5.28: Low alloy steel electrode and rods for GTAW and GMAW.
ASME SFA 5.32: Welding shielding gas.
ASME SFA 5.36: Opening classification for gas metal arc welding.
Official the testing
- Set-up of the test coupon are accordance with approval WPS. (1G, 3G, 6G, etc).
- Welder ID card must available for verification by third party.
- Tool for inspection are available such as touch flash, welding gauges, multi amperage, leveling, pure detector for check purging gas (stainless steel), temperature record (preferable TempilStik).
- Setting up welding parameter accordance with the WPS.
Marking the test coupon such as welder ID, position, location of test specimen (figure QW-463.2).
[Note 1] 6G must be marked up a line by paint marker at top and bottom for identification. Its location shall identify on mechanical test (QW-463.2) or RT test.
[Note 2] GMAW, FCAW must conduct on material thickness above 10 mm and in additional side bend test due to more project specification the test.
[Note 3] Learn more measurement of preheat temperature
Type of Test Required
Welder qualification shall be passed mechanical test or alternative volumetric NDE and visual examination.
Visual Inspection (QW-194)
Performance test coupons shall show no crack and complete joint penetration with complete fusion of weld metal and base metal (inside and outside).
Mechanical Test QW-302.1 and table 452.1 (a)
Side bend: 4 specimens (learn more QW-302.3).
Root bend: 1 specimen.
Face bend: 1 specimen.
Tube-to-tubesheet test (QW-193.2).
Five mockup weld are required to qualify each welder.
Volumetric NDE (QW-190)
RT acceptance criteria: QW-191.1.2
UT acceptance criteria: QW-191.2.3
Bring all essential variable QW-350 to welder qualification certificates (Suggest for QW-484) or template here.
Type of test and test results.
The range of qualification.
QW-402.4 or .7: Deletion or addition of backing, (back weld or back gouging, double weld are considered a backing)
QW-403 Base metal
QW-403.16: Change pipe diameter (QW-452)
QW-403.18: Change P-Number (QW-422 and QW-423 for alternative base metal qualification).
QW-404 Filler metal
QW-404.14: Deletion or addition filler metal
QW-404.15: Change F-Number (QW-432 and QW-433)
QW-404.22: Omission or addition insert (None)
QW-404.23: Change product form, (GTAW (solid rod) can not use electrode SMAW(flux coated)
QW-404.30: change t weld deposit (QW-452.1 (b) for welder qualified by volumetric NDE).
QW-404.32: t limits (for GMAW process only ).
QW-405.1: Addition position (6G qualified for all positions)
QW-405.3: Change vertical welding (change uphill to downhill and vice versa, check welding electode)
QW-408.7: Change type fuel gas (Change 100%CO2 to 100% Argon, etc)
QW-408.8: Omission gas (qualification of stainless steel required backing gas by argon, if he would like to weld carbon steel material, backing gas by argon must not be omission).
QW-409.2: Change transfer mode (for GMAW)
QW-409.4: Change current or polarity (not allowed the change from DCEN to DCEP and vice versa)
[Note 1] QW-403.16: A change in the pipe diameter beyond the range qualified in QW-452.
(a) Groove weld of SET-ON nozzle shall be based on the nozzle or branch pipe O.D.
(b) Groove weld of SET-IN nozzle shall be based on the shell, head or pipe run O.D.
[Note 2] Tube-to-Tubesheet welder qualification are separated in accordance wwith QW-303.5
Renewal of qualification
Renewal of qualification may be done on test coupon/production work by RT or UT reports (QW-322.2)
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