×
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

Velocities in Relief Lines

Velocities in Relief Lines

Velocities in Relief Lines

(OP)
I'm working on a project with the fluid being API 42 crude. I'm having a bunch of trouble finding a clear answer on allowable velocities for inlet and outlet lines for the relief. For inlets, I've found the general rule for <3% pressure drop but I'm expecting fluid velocity to matter prior to that for a liquid line.

Key in this question also is the velocity through the valves on the upstream and downstream side.

Thanks for the help. This is all for a 31.4 system.

RE: Velocities in Relief Lines

Velocities should probably be kept below 10m/s in any case, but that may cause too much pressure loss. Relief lines with too great of a pressure drop don't work all that well. So it really depends on how much pressure you have at the inlet and the length of the relief line. Relief valves must have enough capacity for your relief flow rate, without losing too much pressure across the valve itself. They must be sized exactly right.

you must get smarter than the software you're using.

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