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Post weld heat treatment with AWS D1.1

Post weld heat treatment with AWS D1.1

Postby 78500902 » Thu Feb 05, 2015 3:50 pm

Hello, I have the following question.

We have welded a trunnion to a pipe with a full penetration single side weld. This weld, because of the thickness of the trunnion (65mm), has required PWHT as specification requires PWHT for thickness over 40mm. After being treated, a modification of the dwg requires a fillet weld with a leg of 45mm. As per specification this fillet weld would require PWHT.

I would like to know if the requirement of PWHT can be avoided, as they have already qualified a CJP WPS without PWHT, that would cover up to 40mm (over 40mm would require PWHT), and this would cover all fillet welds.
78500902
 
Posts: 1
Joined: Thu Feb 05, 2015 3:41 pm

Re: Post weld heat treatment with AWS D1.1

Postby Ballbearing » Fri Feb 06, 2015 3:06 am

78500902,
You are governed by the specification - this overrules the code.

"As per specification this fillet weld would require PWHT. "

If that is the requirement then there is no way to avoid other than by a Concession Request to the Client / Owner
Regards,
BB
Ballbearing
 
Posts: 76
Joined: Wed Jun 12, 2013 10:11 pm


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