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[MW:20914] Re: Welding of SS 304H to P-91

By Materials & Welding
Dear Sirs
As per the EIL Spec requirement, we are using ER-309 as filler and capping with E309-15/16. Preheating requirement only on P-91 Side: 205 deg C and PWHT 732 to 760 deg C. As per varios literature cited by me, especially literatures by Nickel Development Institute, i fully agree that ER-Ni Cr 3 is the best option. My question is that can using ER309 as a filler can lead to complications and failures. because DMW between P-91 are most prone to failures and i request experts to kindly throw light on this issue

On Tuesday, May 27, 2014 4:42:10 PM UTC+5:30, ARUNABH BERA wrote:
Dear All

Kindly clarify the doubts:
Sir in Ethylene Cracker Furnace at one of the Petrochemical Plant, we have a hook-up between P-91 and SS304H. Here we are using ER309 as the filler.
Is it acceptable, if not what can be the probable problems associated with the filler selection and what are the solutions 

Regards
Arunabh
Engineers India Limited

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