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[MW:35710] P No.5A to P No.1 with ERNiCr-3 Buttering - AVOID PWHT

By Materials & Welding

Dear Sirs ,

 

We have a project with both shell and Reinforcement Pad materials SA516-70, 10 mm Thk ( P No.1 ) and only the Nozzle is SA335-P22, 4" Sch 120 , 

11.1 mm ( P No.5A ) Thk.


To avoid PWHT for this case as per ASME Sec VIII Div I UCS 56-4 Table,

can we do buttering with ERNiCr-3 on P No.5A bevel prep. and butt weld 

with same filler for this dissimilar joint to avoid PWHT after making new 

PQR with buttering ?


ASME AI says, PWHT required after making buttering on P No. 5A bevel 

Prep.


Please confirm.


Regards,

Saravanan,

S.Korea

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