Dear Sir, First of all P No. of Alloy material shall be mentioned. If it is P 5A & 5B then as per FW's specification if t </= 13 mm.- Cool under insulaiton to ambient temp., If 13<t</=25 mm.- 350º C. for 2 hours, If 25<t</=50 mm.- 350º C. for 4 hours, If t> 50 mm.- Intermediate S.R. at 600º C for 2 hours or 650º C for 1 hour. Might the above be helpful to you. With regards, C. R. GANDHI (MANAGER- Q. A./ Q.C.)
--- On Sat, 3/31/12, Zakaria ghrab <zakaria.ghrab@gmail.com> wrote:
From: Zakaria ghrab <zakaria.ghrab@gmail.com>
Subject: [MW:14031] Alloy stels PWHT - Hydrogen Bake
To: materials-welding@googlegroups.com, materials-welding@goolegroups.com
Date: Saturday, March 31, 2012, 3:50 PM
Dear Experts,
need some reference / support from ASME B31.1 for performing hydrogen bake in alloy steels when is not possible to do immediatly PWHT after Welding for any case. - What's minimum time after welding when it's mandatory to perform this intermediate cycle - Holding time and temperature ! - Others requirements (if any) I know that it's necessary to perform this heat treatment but i didn't get support from Code. Regards -- 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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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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