I could not find the reason to do the CVN test again for new group no. of the same P no. material. Assuming the welding process is SMAW, then as per QW 403.5, " If , however, 2 or more qualification records have same essential and supplementary essential variables, except that the base metals are assigned to different group numbers within the same P number, then the combination of base metal is also qualified"
Pls do tell me if that is the not the case, and CVN testing is mandatory (kindly specify the relevant section from the code)
-- On Thu, Oct 28, 2010 at 12:34 PM, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
--Yes, you can, provided all essential/supplementary essential variables are identical to original PQR.
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of atul chaturvedi
Sent: Thursday, October 28, 2010 4:53 PM
To: materials-welding@googlegroups.com
Subject: [MW:0] Supporting PQR for Impact requirements
Dear All,
I have Qualified PQR for welding P1 Gr 1 To P1 Gr 1 with Impact test at (-) 51°C
thickness range 2.77 to 11.08 mm.
But now we have to weld P1 Gr 1 to P1 Gr 2. Can I do one more supporting PQR with with P1 Gr 1 to P1 Gr 2 With only impact testing.
Please clarify whether Tensile test and bend test are mandatory for supporting PQR.
Thanking you.
atul chaturvedi
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