INTERVIEW QUESTIONS - [11] - ASME Sec IX - Welding

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INTERVIEW QUESTIONS

ASME SECTION IX : WELDING

1. How many studs are to be welded for procedure qualification of stud weld test?


Answer: Ten Studs; as per QW 192.1.1

2. Any requirement for stud welding equipment for procedure qualification as per ASME Sec IX?


Answer: The equipment used for stud welding shall be completely automatic except for manual starting.

3. What are the test to be done for the procedure qualification of stud welding?


Answer:

1. Every other welding stud (five joints) shall be tested either by hammering over until one fourth of its length is flat on the test piece, or by bending the stud to an angle of at least 15 degree and returning it to its original position using a test jig and an adapter location dimension that are in accordance with figure QW-466.4

2. The remaining five welded stud joints shall be tested in torque using a torque testing arrangement that is substantially in accordance with figure QW-466.5. Alternatively where torquing is not feasible, tensile strength test may be used.

4. What is the acceptance criteria for bend and hammer tests?



Answer: In order to pass the test(s), each of the five stud welds and heat affected zones shall be free of visible separation or fracture after bending and return bending or after hammering.

5. What is the acceptance criteria for torque tests?


Answer: In order to pass the test(s), each of the five stud welds shall be subjected to the required torque shown in the table, which is given with QW 192.1.3


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