Dear,
Before saying PWHT required or not we need to know the thickness of the paf and the size of the weld?
If heat transfer to P91 is less through the CS pad then no stress creation will take plase in the P91 in this case no PWHT required but as said above this will depend on CS pad thickness.
Regards
Dear AllAs per my opinion, It is Acceptable with Normal Clause of Heat Treatment, it was not in contact with P 91 material , So Not Need to Heat treatment of CS.but it is Actually Depend upon thickness of weld Bead of Carbon Steel Plate with P91 Material and More on Heat which Was Produced During Carbon Steel welding Pad .But Geometry show that , if you do Heat Treatment only to P91 material it will surely effect on CS Support , so it is better you do Heat treatment to Whole Assembly include CS support To Avoid Stress Concentration .Dear friend :Please Put one thing in mind ,Heat Treatment always show benefit to any Material within if it 's within Temperature range so Do not worry .Dear jhen: I am Looking your response on my explanation .RegardsRItesh RajputSr.ManagerUnited Piping Solution Group--On Thu, Jan 16, 2014 at 9:14 AM, Babur Khan <mbabur.bwp@gmail.com> wrote:Dear Sumod,As per attached figure no need PWHT for CS tissue because no direct contact with (P91) material.
--On Wed, Jan 15, 2014 at 7:54 PM, John Henning <jhenning@deltak.com> wrote:
--Grade 91 in the as welded condition is susceptible to stress corrosion cracking – you decide.
John A. Henning
Welding & Materials
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sumod s
Sent: Wednesday, January 15, 2014 5:54 AM
To: materials-welding
Subject: [MW:19867] PWHT on P91 support (Pad +Shoe)
Dear experts,
PWHT is done on pipe(P91) to pad (P91) weld. Is it required to do PWHT on pad (P91) to support shoe (CS) fillet weld. Please refer the attachment for details.
Sumod
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BABUR KHAN LASHARI
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Mob: +966 (0) 56 2179280
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