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[MW:14996] Re:Crack in the shell with thickness of 82.6 mm After PWHT

By Materials & Welding

Dear Experts,

A Ring of diameter 4 m ( 82.6 mm thickness welded with 25 mm thickness) had  crack to the length of  4 m on the welded area after PWHT.
After analyzing the reasons , while doing PWHT at the time  cooling stage, temperature maintained was 86.7 degree instead of 80 degree Max..
Is this is the reason for the crack.
Experts please clarify the reason and solutions.Awaiting the response at the earliest.

Regards / Haja M.






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