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Re: [MW:10446] Which is better material for Seat / Control Valves / Sour Service

By Materials & Welding
Dear VPV
For SOUR gas application you must consider effect for hydrogen cracking means you have to consider body material, seat and ball material etc. What will be minimum temperature of medium?
Regarding TRIM  you have to go stellite 6+ENP  but you have further check ball and other parts material. Also  for SOUR specially Gas application valve you have to consider fire safe and related certificate.
 
Regards
Saleem
Kingdom of Bahrain.


 
On Tue, Mar 15, 2011 at 12:59 PM, Vino Varghese <vinopvarghese@gmail.com> wrote:
Dear Experts,
 
The Data sheet for Control Valve calls for Seat Material of Trim as Stellite 6 + ENP and Supplier is offering SS 316.
Whis is better - Is it Stellite 6 + ENP or SS 316?
 
Info: Service to be used is Sour Service.
Temperature : 60 Degree Centrigrade
Inlet Presure: Max. 0.5 bar g
Otlet Presure: Max. 0.3 bar g
 
Appreciate to see response ASAP.
 
Regards
VPV

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