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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