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Re: [MW:15326] PWHT holding temp exceed by 10 deg out of specified limit

By Materials & Welding
PWHT is acceptable. You have to mention 605 +-10 deg. Because the lower side should not be less than 595 deg C as per code. Maximum temp should not cross 640 deg.C (metallurgical point of view).

Thanks & Regards
Muhammed Ibrahim PK



On 13 September 2012 08:32, Sadique Sheikh <sadiq.mech@gmail.com> wrote:
Dear ALL,

While reviewing PWHT chart, I found that for IS 2062 E250 B, 50mm butt joints holding temp found exceed by 10degree (Required 590 deg +- 10 deg and observed 610 deg).
My question is 1) Is it acceptable?
2) what will be the effect on joints by exceeding 10 deg temp out of specified limit?
3) Does code permit to do PWHT again on same joints in specified limit of temp?

Thanks & regards,

Mohd. Sadique Sheikh

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