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


API 650 tank internal pressure

API 650 tank internal pressure

API 650 tank internal pressure

Hi Can any one let me know if the tank over turning moment due to tank internal pressure on cone roof (uplift force on roof) needs to be considered as part of seismic overturning moment calculation for self-anchored tanks?

RE: API 650 tank internal pressure

In the current API-650, Equation E. includes a term for 0.4W-int in the evaluation of J, which is the effect of pressure uplift.
This has been changed in more recent editions, and older editions didn't include this term, so an existing tank may not have included this interaction. Or, if you're using an outdated edition, it may not be there.
Logically, the seismic uplift would be included in the maximum pressure equations in Appendix F as well, but currently isn't.

RE: API 650 tank internal pressure

Thanks JStephen. Agree to your comments and thanks.

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