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High temp helium service

High temp helium service

High temp helium service

(OP)
Hi all.

What cast material would be used for a valve body in Helium service, temperature up to 350°C, pressure max 90 bar?
We were informed, that under these condition Helium tends to creep through any kind of casted material so only forged material to be used.

RE: High temp helium service

Cast grey iron is one of the easiest materials to cast without voids.  But, it's still a sieve compared to forged steel or forged brass.  Why would you not want to use a forged valve body?

RE: High temp helium service

I agree with btreublood.
I´ve seen specs with that conditions using
forged CS gatevalves acc B16.34

RE: High temp helium service

Forgings lack the pathways that exist in castings.

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