Hi!
Post heating is to be carried for weld which is dicontinued /interupted for long time where the preheated temeperature of the weld and surrounding area(Base) is not reduced
You can post heat discontinued weld and later on even next day you can continue the unfinished weld
However it is always advisible to complete the critical metallurgy weld in one go only (Better not to interrupt) In case of power failure you can keep the weld under preheating temperature range till the power is restored
Regards
Hegde P.B.
From: srinivas rao <ksrvasu@gmail.com>
To: materials-welding@googlegroups.com
Sent: Fri, 10 December, 2010 8:54:28 PM
Subject: [MW:8670] Alloy Steel
Dear All,
While welding of ASTM A335 Gr P11, what to do if welding was stopped after Root Pass ,Hot Pass and One Fill-Up done without completing the job? Can we do immediately Post Heating for the un-finished job and continue welding next day? or Should we cut and re-weld the joint?
I have one more doubt... In the above situation what if welding and Pre-heating(coil heating) was stopped due to power failure for 2 to 3 hrs and the joint has to come to room temp. Should the joint be cut and re-welded?
Regards,
Vasu
--
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