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!

*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.

Jobs

Venting to Vapor recovery and venting to a flare

Venting to Vapor recovery and venting to a flare

(OP)
My question has to do with venting a mechanical seal reservoir (plan-52) to flare vs. to a vapor recovery unit. Am I correct in assuming that the vru piping is at negative pressure, while the flare line is at positive pressure?

RE: Venting to Vapor recovery and venting to a flare

Suction pressure to the VRU may be positive most of the time.

In any case, typically a VRU would receive feeds from continous venting sources - the flow from the seal pot on a plan 52 would be too small ( even during a typical leak scenario) to justify recovery.

RE: Venting to Vapor recovery and venting to a flare

(OP)
Thank you. I am most concerned with the pressure in the plan-52 reservoir. Wondering how much higher than atmospheric it woukd be when connected to a flare vs. vapor recovery system. Can you clarify?

RE: Venting to Vapor recovery and venting to a flare

(OP)
So I take it that both flare and vru lines are always at some positive pressure?

RE: Venting to Vapor recovery and venting to a flare

Yes, safety considerations will require that the VRU suction be always kept positive to prevent air ingress into the compressor feed.

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


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