Monday, October 26, 2020

Re: [MW:31615] POST HEATING IN PWHT


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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