×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Oversizing PSV for HEX tube rupture case

Oversizing PSV for HEX tube rupture case

Oversizing PSV for HEX tube rupture case

(OP)
Dear all

I sized a pressure relief valve for an Heat Exchanger and for tube rupture case.
The problem is that I considered 3 tubes to be ruptured and as result I oversized the relief. I have 2 questions:

1) Is forbidden from API to consider 3 tubes ruptured and you have to consider only one ?

2) Were is the problem if I oversized the relief and it can handles more mass flow than the minimum required ?

 Because my client complained about the above problem I really appreciate a quick response

Best Regards

    
 

RE: Oversizing PSV for HEX tube rupture case

From what I understand, usually only one tube is considered to break.  It is not forbidden, but it may be too conservative.  

The biggest problem with oversizing relief valves, is the cost.  API recommends less than 3% inlet loss at capacity for all overpressure scenarios.  If your valve is really large for tube rupture, the inlet piping may have to be quite large.   

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!


Resources