No you do not need to requalify the welders. See QW-423.1. See also QW-100.3 and, especially, the last paragraph of QW-420.
The last paragraph of QW-420 reads as follows:
"There are instances where materials assigned to one P- or S- Number or Group Number have been reassigned to a different P- or S- number or Group Number in latter editions. Procedure and performance qualifications that were qualified under the previous P- or S- numbers or Group Numbers may continue to be used under the new P-Number or Group Number assignment, see QW-200.2 (c) , provided the WPS is revised to limit the materials qualified for welding to those assigned to the new P- or S- Number(s) and Group Number(s) for the specific materials originally used for the procedure qualification test coupon. . . ."
John
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Zakaria ghrab
Sent: Tuesday, June 21, 2011 11:30 AM
To: materials-welding@googlegroups.com
Subject: [MW:11430] T91 P Number / Welder's qualification
Hi all,
In our project, we have to weld T91 material, our welder's qulified in 2011 in PN°5A material, so according ASME sect IX edit 2007 they can weld T91 materials. But in the last edition, T91 is P Number 15E, we must re qualify the welders for this PNumber.
T91 is really P Number according lasr edition ASME ?
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زكرياء غراب
GHRAB Zakaria
مسؤول عن الجودة
QA/QC SENAD
مشروع المحطة الحرارية ـ الوحدة الرابعة
المحمدية ـ المغرب
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