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Re: [MW:12566] PWHT Requirement for SA 335 P91 (or P no. 5B Group 2)

By Materials & Welding


Dear Asif
Its very critical matril and care shoud be for preheating,postheating and strss relieving.For you,s comfor i am attaching a complete method statement forfabrication of P91 mterial
 
Thanks
 
Mumtaz
 
 
 
 
 
 
On Tue, Sep 27, 2011 at 9:11 AM, ASIF <asifdme@gmail.com> wrote:

Dear experts!


Project : Solar Power Plant
Construction Code ASME B31.1

ASME Sec IX

PWHT Requirement - SA 335 P91 or P no. 5B Group 2 material is not included in 132 Para and Table of B31.1, and also,
ASME Sec IX para QW-407 do not mention this material group.

Client Specification do not mention this requirement separately

Please advise! do we need to go for PWHT ?



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