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Re: [MW:21256] Post weld heat treatment for blind flange of manhole when lethal service.

By Materials & Welding

Lethal service ,Pwht Required due to more than 13 mm thick fillet size Sec viii table ucs 56 notes 2(c)3.
On 25 Jun 2014 06:13, "ji Ch" <jinsuok21@gmail.com> wrote:
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> Sir.
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> I've question for this subject.
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> In the ASME Sec.VIII Div.1, 
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> The vessel fabricated by carbons steel, and it applied lethal service, so it need post weld heat treatment refer to UW-2 (a) 
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> In this case, for blind flange of manhole, davit hinge welded to side portion of blind flange with over 16mm weld thickness of fillet weld.
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> is this blind flange also required post weld heat treatment ? or not ?
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