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Whitephone
Guru

Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34

Change Iconel Type and PWHT

10/01/2010 5:30 AM

We need weld P91 with ss-316L (Pipe to a thermo coupilng). My concerns are about to points:

1. Approved WPS require ERNICR3 (SFA N 5.14), But we have ERNICRMO 3 (Same SFA N 5.14) May I use this filler metal without WPS recualification?

2. Is possible to PWHT at 745ºC the SS- 316L? (For P91 is OK)

Thanks
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ashfaqanwer
Commentator
Engineering Fields - Piping Design Engineering - New Member

Join Date: Apr 2010
Posts: 66
Good Answers: 1
#1

Re: Change Iconel Type and PWHT

10/08/2010 3:31 PM

In my opinion, buttering (if possible) of P91 side should be done followed by PWHT. After this, you weld the part to SS316L piping.

You must use ERNiCr-3 although F-numbers of both the wires are same but A-number is different and both are essential variables for GTAW. Or otherwise, re-qualify the welding procedure with ERNiCrMo-3.

Regards,

Ashfaq

http://thepetrostreet.com
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