Hi For P1 Materials you can refer, Table UCS-56 , page number 161, of ASME Sec VIII Div 1, wherein PWHT is mandatory for weld joints over 38mm nominal thickness and etc.... Regards Prem Nautiyal
--- On Mon, 6/27/11, John Henning <jhenning@deltak.com> wrote:
From: John Henning <jhenning@deltak.com>
Subject: [MW:11489] RE: 11467] Minimun thickness requirement to carryout PWHT for CS
To: materials-welding@googlegroups.com
Date: Monday, June 27, 2011, 7:43 PM
PWHT requirements are specified in the "book" or construction Code sections (i.e. Section I, Section VIII, B31.1) or by customer specification. Sc IX on tells one the requirements for qualifying welding or brazing procedures and personnel working to them. As such Sc IX does not specify a minimum thickness for PWHT than the applicable procedure thickness range based on PQR thickness. John From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Venkateswaran
Sent: Saturday, June 25, 2011 2:15 AM
To: materials-welding@googlegroups.com
Subject: [MW:11467] Minimun thickness requirement to carryout PWHT for CS As per ASME Sec 8,what will be the minimun thickness requirement to carryout PWHT for CS .Kl.refer me the page no/Table. 
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