The exemptions provided in Table
UCS-56 or Table UCS-56.1 are not permitted when postweld
heat treatment is a service requirement as set forth
in UCS-68, when welding ferritic materials greater than
1⁄8in. (3 mm) thick with the electron beam welding process,
or when welding P-No. 3, P-No. 4, P-Nos. 5A, 5B, and
5C, P-No. 10, and P-No. 15E materials of any thickness
using the inertia and continuous drive friction welding
processes.
Regards
Hi,
As per Code,Welding of pressure part cannot be done after PWHT.
But there is an option is that,you can weld the non pressure part to pressure part with fillet weld and the throat thickness should not exceed 13mm and also you have to do preheat with minimum 95 degree celcius,
If you meet the above criteria on your weld..you dont need to do PWHT again.
Thanks & Regards,
(Karthik)
Karthikeyan.SGetabec Energy Co.,Ltd.379,Moo6,Soi8,Nikhomphatana,Rayong-21180,Thailand.Phone: 0066 38 897035-8 (Off)Fax: 0066 38 897034Hand Phone: 0066 892512282
--- On Wed, 8/18/10, sunilrathoreps@yahoo.com <sunilrathoreps@yahoo.com> wrote:
From: sunilrathoreps@yahoo.com <sunilrathoreps@yahoo.com>
Subject: [MW:6549] pwht for service vessel
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Wednesday, August 18, 2010, 12:24 AM
Dear all
I have an vessel which is pwht as per service requirement,mention in note not to weld on pressure part after pwht cycle ,but we want cement lining inside the vessel up tp half portion to do this we have to put wire mash for lining to do this we have to weld this mesh with vessel , my doubt is that is this required pwht ?even this mesh weld will nt be in contact with servic after lining . Vessel mat is kcs with 34mm thk.
Regards
Sunil singh
--
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.
--
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.
--
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:
Post a Comment