SA 335 grade P9- preheat given 200 degree only as per client requirement then once welding completed , preheat will be increased upto 350 for half an hour.
Rate of heating is same as pwht like 100 degree per hour.
Thanks & Regards
Chan
On Mon, 26 Oct 2020, 08:41 NIKHIL THOMAS JOY, <nikhil.thomasjoy@gmail.com> wrote:
Dear sir, Good evening
Sir, kindly please solve my doubt related to POST HEATING IN PWHT.
1.Where we need to do post heating.
2.If I am doing pwht sudden after welding is there any need of post heating or not.
3.In any code post heating mentioned.
Please give me answer for the above mentioned question.
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