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Ball Valve Material Selection in Basic Design

Ball Valve Material Selection in Basic Design

Ball Valve Material Selection in Basic Design

(OP)
Ball Valve Material Selection in Basic Design

We are dealing with a crude oil terminal with maximum line pressure (operating) 2,5 bar. (crude density=930 kg/m3 and max H2S=70 ppm, design temp = 4-85 centigrade), The valves are 40" full bore ball valves .
I have 2 questions:
1- Which material is most suitable for the body, A105, A350 LF2 or A216 Gr. WCB? (Considering both technical and economical views according to the operational condition). Generally in which conditions the forged body is mandatory?
2- Which material is most suitable for the ball? Fully SS 304 or A350 LF2 with E.N.P 25 Micron?
Thanks all before

RE: Ball Valve Material Selection in Basic Design

1.  The most suitable material is the one that meets the design requirements and offers the best value.

2. Is there corrosive service?  Are there chlorides in the fluid?  Any H2S?  Any solids?

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

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