requirements for ball valve for hydrogen gaseous service

[chinwar]

Dear All:

Appreciated if someone can tell me if there are some special requirements for ball valves used for hydrogen gas service. And any national codes for this?

Thanks and Regards,

 

[NGiLuzzu]

chinwar,
you may want to see API 941 std. (I know about 4th edition, 1997; may be it has been revised in the meantime...?) about steels used in presence of H₂ gas.

Hope this helps, 'NGL

 

[SJones]

See if you can get hold of NASA Guideline NSS 1740.16 - it's a useful document.

Steve Jones
Materials & Corrosion Engineer

http://www.pdo.co.om/pdo/

 

[chinwar]

thank angeri and SJones. I really got some fresh air from your suggestion.