QW-423
QW-423
(OP)
In ASME Section IX QW-423 Alternate base materials for WPQT, if we qualify a welder on a WPS with a base material of P-No. 5A, does it mean we can use CS test pipe instead of P-No. 5A provided that the other essential variables are followed? We will use the same filler wire, backing gas, etc. as indicated in the WPS.
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RE: QW-423
Pipoy04,
No; QW-423 applies to welder qualification only.
This means is that if you qualify a welder on [P‐No. 1 through P‐No. 15F, P‐No. 34, or P‐No. 41 through P‐No. 49], your welder is qualified to weld [P‐No. 1 through P‐No. 15F, P‐No. 34, or P‐No. 41 through P‐No. 49].
The qualified material specified on the WPS used during qualification, as well as other variables needs to be followed. For example, if the WPS is qualified on P5A material, you cannot substitute P1 material (or any other P number material)during welder qualification.
RE: QW-423
RE: QW-423
What about the qualification tests requirements of QW-301.2? The performance qualification test shall be welded in accordance with qualified WPS? From the word "welded in accordance" does this mean that the test pipe material specification will be omitted?
RE: QW-423
Interpretation: IX-13-25
Subject: QW-301.4, Record of Tests
Date Issued: February 20, 2014
File: 14-371
Background: Welders are qualified using a qualified WPS at the time of their welding tests, in accordance with
the requirements specified in QW-300.2 and QW-301.2.
Question: Is it a requirement of Section IX that the WPS followed at the time of a welder’s qualification test be
listed on the welder performance qualification report for that welder?
Reply: No.
RE: QW-423
I have witnessed hundreds of P1 coupons welded with S/S wire (which I personally disagree with from a weldability perspective) but they comply with QW 423 so that is all that matters.
Never seen a WPS with P1 welded with S/S wire though ?
Cheers,
DD