valve body material

[farahnaz77]

I have a question about body material of valve. Which type of material is suitable when the fluid is contain 25% (mole) of CO2 and 75% H2S? Can carbon steel be used as body material or only stainless steel is suitable? What ASTM codes are used for this case?
Thanks in advance

 

[NGiLuzzu]

farahnaz77,
what is your service temperature?

In any case, my sensation is that "simple" stainless steel is not even enough and the right materials (if any) should be "super-alloys" (Nickel or Nickel-Copper ones...)...

About standards andregulations, I would suggest to consider the NACE documents (see

http://www.nace.org/nace/index.asp).

Bye, 'NGL

 

[zdas04]

Also, you need to specify if the stream is dehydrated or not. That mixture is really awful if there is any water present.

David