×
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

Vacuum Relief equipment
2

Vacuum Relief equipment

Vacuum Relief equipment

(OP)
I need to periodically install conservation vents and vacuum vents on atmospheric storage tanks - how do I determine the correct weights for these?

RE: Vacuum Relief equipment

2
Good question.

Hopefully, you have a design pressure and vacuum rating for your tank.  These are typically in inches of water.

Next, you need to determine the vent loads.  API 2000 is the standard reference for this for atmospheric tanks and walks you through it very clearly.

Once you have the design pressure/vacuum ratings and the required inflow and outflows for the tanks, you need to pick a valve and setting so that it will flow the required rate without exceeding the tank's design pressure (or inflow the required volume without exceeding the tank's vacuum rating). Shand and Jurs and Protectoseal are a couple of common ones.

If you have blanketing valves or vent valves to a vapor recovery system, you need to stagger all these set-pressures or control points within possibly a fairly small pressure band.

Unlike pressure vessels, there is no equivalent to the 10% allowable overpressure during an upset.

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