Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Leak Testing PSV Downstream Flange

Leak Testing PSV Downstream Flange

Leak Testing PSV Downstream Flange

Are there any cases where it is unacceptable to leak test the downstream flange of a PSV i.e. can a relief valve be damaged by an artificially high back pressure due to leak testing?

I'm not proposing to leak test in excess of the flange rating but leak testing will mean that the downstream side is pressurised while upstream side is not. This is a balanced bellows PSV. Set pressure is 20 barg and downstream side will be leak tested to 17.5 barg.


RE: Leak Testing PSV Downstream Flange

first of all have you checked with the RV vendor ? That is your start point.

RE: Leak Testing PSV Downstream Flange

As well as getting the SRV vendor views, you need to consider;-
1) That the SRV is not under pressure (ie, live and protecting the system).
2) What the test medium will be and if it can affect the SRV internals.
3) The maximum pressure at the SRV outlet will be dictated by the bellows not the outlet flange rating - can be quite lower than expected especially on large orifice.

Per ISO, only the term Safety Valve is used regardless of application or design.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close