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Re: [MW:35802] PWHT of blind flanges

By Materials & Welding
Permanent blind flanges may not require PWHT, any welds associated with them typically do, if they affect 
the structural integrity. But if the handle is a temporary weldment, and removed later or if the fillet is small,
then PWHT is not needed. 
C Sridhar.

On Thu, 4 Sept 2025 at 18:36, Muhammed Ibrahim PK <ibratech@gmail.com> wrote:
Dear All,

Is it required to place permanent blind flanges in the furnace when the vessel requires PWHT ?. 

If there is handle welded on blind flange, PWHT required ?


Thanks & Regards
Muhammed Ibrahim PK

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