[MW:12547] RE: 12545] PWHT Requirement for SA 335 P91 (or P no. 5B Group 2)

Dear Sir,

From my understanding and experiences , P91 always need PWHT after weld for most of the cases.

If I am not wrong , now P91 should be classified to different P No. ( P15E ??? ) , please check from the most updated ASME IX.

Regards,

C.Nopadon

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ASIF
Sent: Tuesday, September 27, 2011 12:12 PM
To: materials-welding@googlegroups.com
Subject: [MW:12545] PWHT Requirement for SA 335 P91 (or P no. 5B Group 2)

 

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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