×
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

API 650 Section F.7.5

API 650 Section F.7.5

API 650 Section F.7.5

(OP)
In API 650 section F.7.5 states that;

"The counterbalancing weight, in addition to the requirements in 5.12, shall be designed so that the resistance to uplift at the bottom of the shell will be the greatest of the following:
a. The uplift produced by 1.5 times the design pressure of the tank (minus any specified corrosion allowance) plus the uplift from the design wind velocity on the tank.
b......

In equation form I read this as.

Mw + (1.5*Mpi) < MDL

This is always going to be greater than the equation in section 5.12 of;

0.6Mw + Mpi < MDL/1.5

If section F.7.5 is always to be considered for the overturning moment why is it not the governing calculation in place of the 5.12 as it will always be the greater of the two?

RE: API 650 Section F.7.5

The weight in the first case includes foundation weight.  The second case is for overturning of an unanchored tank and does not include foundation weight.

RE: API 650 Section F.7.5

(OP)
Thanks JStephen.... That makes more sense.

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