Dear AISF,
Please refer to ASME Section IX, paragraph QW-423.1:
Welders qualified using any P-No. 1 through P-no. 15F, P-No. 34 and P.-No. 41 through P-No. 49 are qualified for production welding of same. Therefore, yes, he would be qualified for A335 P91 materials without further qualification. I would however, caution that you need to ensure the welder understands the requirements of welding P15E materials and that there is a qualified procedure acceptable to product and service conditions.
Dan Wagner
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ASIF
Sent: Thursday, October 20, 2011 4:58 AM
To: materials-welding@googlegroups.com
Subject: [MW:12725] P91 - Welder qualification
Dear experts!
As per previous edition of ASME Sec IX, If a welder qualifies for P no. 1
his range of qualification will be P1 through P11.
According to latest edition of ASME Sec IX-2010, P no. of A335 P91 material
is changed from P5B Group 2 to P15E Group 1
If a welder qualifies with P1 material, can he weld A335 P91 without additional qualification?
Regards
ASIF
+971-50-9198730
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