valve testing

[davelamps]

hi i am setting up a maintenace regime for a HRSG can anybody assist by telling me the time between stripdowns required of pilot operated safety valves?

do they need functional testing yearly

can they be trevitested

 

[itascot]

You could post this in Safety Relief Valve engineering (PSV) forum, they should have this info.
If I recall correctly, when I serviced these on gas tankers (many years ago) it was a 3 year check & certification (with DNV present), I guess it depends on where the pilot op SRV's age in service.
Ciao,

 

[hsbcn]

These discussions may help:

http://www.eng-tips.com/viewthread.cfm?qid=110710&page=133

http://www.eng-tips.com/viewthread.cfm?qid=86870&page=167

Hope these links help.

Heather's focus: Alloy Valves Duplex Valves Super Duplex Valves Monel Valves Inconel Valves [link titanium-valves.com]Titanium Valves[/url] & 6 Moly Valves