Tuesday, February 14, 2012

[MW:13680] Clarification on QW-423.1

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.

Thanking You,
Pramod.

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