Does the hydrogen control valve need to be degreased?
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Does the hydrogen control valve need to be degreased?
Valves also need to be degreased, usually in valve factories. Remove the protective layer at the installation site, and it can be installed.
Yes, the hydrogen control valve needs to be degreased. This is because oils can pose a risk of hydrogen combustion and explosion. .
I see that some data sheets specify degreasing requirements, while others don’t! Are there specific guidelines for this?
HG20202 «Acceptance Specifications for Degreasing Project Construction Machinery»
Since hydrogen flow meters require degreasing, valves should also need it
Degreasing is required. The valves are degreased before leaving the factory; upon arrival at the site, they are wiped with carbon tetrachloride, and after inspection under ultraviolet light to confirm there are no issues, they can be installed in service.
There are no mandatory requirements for degreasing in strongly oxidizing media.