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Re: [MW:35711] P No.5A to P No.1 with ERNiCr-3 Buttering - AVOID PWHT

By Materials & Welding
preheat isnot enough to avoid because thickness is below 16mm??
THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE,  CSWIP 3.1,
ISO 9712 Level 2 in VT,
ASNT-Level II in PT,MT,RT & UT,
LA ISO 9001-2015, ISO 3834, EN 15085, 
International Welding Engineer. 
CONSULTANT-WELDING & QUALITY
Mobile no: +919940739349


On Sun, Jun 29, 2025 at 5:43 PM PARAI Reaction Channel <saravanshyla@gmail.com> wrote:

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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