Hi,
QW 423.1 says clearly that "ALL COMBINATION OF BASE METALS" .
It means If you qualified with P.No.1 then the welder qualified to weld all combination of base metals of P- or S-No. 1 through P- or S- No. 11, P- or S-No. 34,and P- or S-No. 41 through P- or S-No. 49.
ALL Combination means either P1 to P1 or P1 to other P numbers as specified.
So he can weld P1 to P1 as well as P1 to P8 etc.,and as specified in the right column of QW423.1.
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.
Thanks & Regards,
(Karthik)
Karthikeyan.S
QA/QC Manager
German-Thai Boiler Engineering Cooperation Limited.
Rayong Factory ;
379 Moo.6 Soi 8, Tambol Pananikom,
Nikompattana, Rayong 21180 THAILAND
Tel : +66 38 897 035-9 Ext. 137
Fax : +66 38 897 034
Hand Phone: 0066 892512282
From: Zakaria ghrab <zakaria.ghrab@gmail.com>
To: materials-welding@googlegroups.com
Sent: Tuesday, March 27, 2012 12:03 AM
Subject: [MW:13997] ASME sect IX - Welders Performance Qualification
Dear Experts,
I need some confirmation / explain from your part.
I have welders qualified for GTAW process in carbon steel coupon test material, according my understanding for ASME sect IX welders performance qualification, welders is qualified to weld Stainless steel under all essential variable requirement are ok. IT's our case (Same FN°6 filler metal, added backing gas....).
But our client, said that, according ASME sect IX QW-423.1, welders can not be qualified to weld Stainless steel (PN°8) , it's mention 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" means as their explain, Welder qualified with carbon steel coupon can weld CS to one of (PN°1 to PN°11) but not PN°X to PN°X, X from 1 to 11.
Can you confirm if i'm right and how to get confirmation from ASME sect IX, means what's the means of "combination" in ASME sect IX QW-423.1).
Regards
----
Zakaria
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