Dear Joy ; In Post weld heat treatment we reheat the weld to generally below critical temperature , golf for given time . It is done to remove / reduce residual stresses and also to obtain favourable microstructure changes . For example when there is risk of of cracking after weld , post weld treatment can be adopted . You need to specify your application , material , dimensions etc . Yes post weld treatment is a requirement of code but again details of weld joint, MOC etc are required.
On Mon, 26 Oct 2020 at 10:11, 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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