Is there any standard for High Pressure PSV application?

[Ulon]

Guys,

API 526 is the standard reference for PSV sizing. But as per my awareness, it's only up to ANSI 2500 rating.

If we got a PSV at a pipeline (e.g. Gas Re-injection Flare) at API 10,000 psi rating, how do we size it? Does API 526 still applicable?

The pipe flanges can be refered to API 6A, which sugesting RTJ 6BX connection but how about our PSV flanged? Does it need to be RTJ 6BX rating also (any vendor got this) or ANSI 2500 can be acceptable?

Really need your advise on this, I've been stuck for days =)

Many Thanks,

 

[JLSeagull]

You may need to consider a rupture disc or buckling pin or breakin bar isolation valve.

Also consider posting on the Chemical Engineers Safety Relief Valve forum.

http://eng-tips.com/threadminder.cfm?pid=1203

 

[JimCasey]

You'll probably have to go with a Graylock connection for that pressure if you don't want to weld it.

Pilot-type safety-relief valves would likely be the way to succeed in this application: The pilot has a really small unbalanced area , and the main disc is loaded so that it seals more tightly as the pressure increases.

I have no affiliation with them, but if I were you I would call Anderson-Greenwod (TYCO)

 

[Ulon]

I've already sent the question to Crosby last week, while waiting for the answer I'm trying my luck here.

Yup, I'm going for Pilot PSV. I'm quite concern about the sizing? yes we can use software to size it but will it be recognized by any std?

 

[gerhardl]

Try someone with pilot PSV experience towards atomic power plants, they should be familiar with extreme requirements.

Have a look at below link - but this stops at 431 bar (between 6000 and 7000 PSI) on homepage. Next step might be bursting disc as mentioned above.

http://www.weirpowerindustrial.com/...e_Safety_Valves_and_Safety_Devices_270607.pdf