Hi,
PWHT can be repeated as per ASME Section VIII,Div.1-UHA-32 (e).Please find below the extraction.Holding time shall be the same as the original/as required by project spec.
UHA-32 (e) Vessels or parts of vessels that have been postweld
heat treated in accordance with the requirements of this
paragraph shall again be postweld heat treated after repairs
have been made.
Thanks & Regards,
(Karthik)
Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282
--- On Thu, 1/6/11, Bazrafshan,kazem <KBazrafshan@BPC.CO.IR> wrote:
From: Bazrafshan,kazem <KBazrafshan@BPC.CO.IR>
Subject: [MW:9114] PWHT Of 347H
To: materials-welding@googlegroups.com
Date: Thursday, January 6, 2011, 3:28 PM
Dear All: An urgent question: Base on Project tech Documents we have to do PWHT( in 870°C for 3Hours,Air Cooled) for welding of 2 parts as A312-347H(12.7mm) to A182-347H(6mm,) together((A182 is as a branch to A312). After performing PWHT we found some cracks(dept of crack are from 3 to 8 mm) Just in weld seam. Joint Information: Welding process: GTAM + SMAW. Design Tem: 780°C and Design Pressure is 5.3Barg in convection coils. Welding consumables are :E347H Esab, Wire ER347 esab. Shall we repeat PWHT after repairing or not? If reply is Yes, how much time shall be Holding time ? Please let me know your STD reference As well. Thanks Bazrafshan -- 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.
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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.
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