Dear Experts,
I expect your valuable advice.
As per ASME Sec IX, QW-423.1 It has been detailed that "When a base metal shown in the left column is
used for welder qualification, the welder is qualified to weld all combinations of base metals shown in
the right column, including unassigned metals of similar chemical composition to these metals."
Base Metals for Welder Qualified Production
Qualification Base Metals
P-No. 1 through P-No. 15F, P-No. 1 through P-No. 15F,
P-No. 34, and P-No. 41 P-No. 34, and P-No. 41
through P-No. 49 through P-No. 49
P-No. 21 through P-No. 26 P-No. 21 through P-No. 26
P-No. 51 through P-No. 53 or P-No. 51 through P-No. 53 and
P-No. 61 and P-No. 62 P-No. 61 and P-No. 62
This has been explained in latest edition (2010), still I have some doubts. As we know 'P' number is essential variable, one welder qualified for one 'P' number cannot weld other 'P' material. But this above mentioned instruction gives some confusion regarding this matter. So anybody can please explain to clarify my doubt.
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