INTERVIEW QUESTIONS
ASME SECTION IX : WELDING
1. Can NDT be used to replace mechanical testing for the performance qualification of welders?
Answer: Yes
AS per QW-142, Radiographic or ultrasonic examination may be substituted for mechanical testing for groove-weld performance qualification as permitted in QW-304 to prove the ability of welders to make sound welds.
As per QW-304. Welders may be qualified by volumetric NDE when making a groove weld using SMAW, SAW, GTAW, PAW and GMAW (except short circuiting mode for radiographic examination) or a combination of these process, except for P.No.21 through P No.26, P.No.51 through P No.53, and P.No.61 through P No.62 metals.
Welders making groove welds in P.No.21 through P No.26 and P.No.51 through P No.53 metals with the GTAW process may also be qualified by volumetric NDE
2. Can NDT be used to replace mechanical testing for the performance qualification of welding operator?
Answer: Yes
AS per QW-142, Radiographic or ultrasonic examination may be substituted for mechanical testing for groove-weld performance qualification as permitted in QW-305 to prove the ability of welding operators to make sound welds.
As per QW-305. Welding operators may be qualified by volumetric NDE when making a groove weld using SMAW, SAW, GTAW, PAW, EGW and GMAW (except short circuiting mode for radiographic examination) or a combination of these process, except for P.No.21 through P No.26, P.No.51 through P No.53, and P.No.61 through P No.62 metals.
Welding operators making groove welds in P.No.21 through P No.26 and P.No.51 through P No.53 metals with the GTAW process may also be qualified by volumetric NDE
3. Is a written radiographic examination procedure is needed for welders/welding operator qualification using radiographic examination?
Answer: No
As per QW-191.1.1 (a), A written radiographic examination procedure is not required. Demonstration of density and image quality requirements on production or technique radiographs shall be considered satisfactory evidence of compliance with article 2 of sectionV.
4. Is a written ultrasonic examination procedure is needed for welders/welding operator qualification using ultrasonic examination?
Answer: Yes
As per QW-191.2.1 (b), Ultrasonic examination shall be
performed using a written procedure verified by the manufacturer to be in
compliance with paragraph T-150, Article 1, Section V and the requirements of
Article 4, Section V for methods, procedure and qualification.
5. Is there any base material thickness restriction for ultrasonic examination of test coupons of welders and welding operators?
Answer: Yes
As per QW-191.2.1 (a), The ultrasonic examination for welder and welding operators may be conducted on test welds in material 1/2 in. (13 mm) thick or greater.
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