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Re: [MW:35864] Re: PWHT of blind flanges

By Materials & Welding
Blind Flanges (manhole or other) are keep separate in farnace. Don't assemble with vessel. 

Flanges serrations need to protect, apply chalk powder .

Welded flanges will do PWHT along with vessel. Because of flanges thickness.

On Thu, 23 Oct 2025, 6:08 pm Mohd Siraj, <mohd52100@gmail.com> wrote:
which type of gasket u will use to fix permeant blind flange?

On Thursday, September 4, 2025 at 4:06:54 PM UTC+3 Muhammed Ibrahim PK 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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