Tuesday, April 14, 2009

[MW:1945] RE: 1944] PWHT per B31.1

It depends on your joint configuration, thickness of both basemateials, weld thickness etc.

Not mandatory when both the conditions are met, not just one.

1)      the nominal thickness is ≤19mm

2)      and a min preheat of 95 °C applied, when either of base metal exceeds 25mm

 


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Torkaman
Sent: Tuesday, April 14, 2009 1:38 PM
To: materials-welding@googlegroups.com
Subject: [MW:1944] PWHT

 

Dear All.

Acc. to ASME B31.1 for material's with P No.1 & THK>19 mm, PWHT is required. But when min. preheat 95oC is applied, PWHT is non mandatory. Is it true?

 

Best regards,

Mehrdad

 



--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---

No comments:

Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...