×
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.

Students Click Here

650 Tank

thread1452-260793

650 Tank

650 Tank

(OP)
Dear Friends,
Contractor has hydrotested a storage tank built to API 650.

It is noticed that some tank settlement has taken place at the edges and at different points in the bottom floor.

What are the acceptable limits for different types of tank settlements and please advise which code / standard provides these limits.

Please note that tank has not been put into service and contractor has not formally handed over the tank to owner.

Thanks in advance.
Replies continue below

Recommended for you

RE: 650 Tank

650 is silent on the acceptable limits of settlement.  It does say, however that if settlement measurements are specified by the Purchaser, any differential settlement greater than 13 mm per 10 m (1/2 in. per 32 ft) of circumference or a uniform settlement over 50 mm (2 in.) shall be reported to the Purchaser for evaluation.  But this does not address your question.  653 covers tanks after they have been put in service.  I'm interested in the responses of others here!

RE: 650 Tank

650 is as noted by IFRs.

653-2005 Section 12.5 Measured Settlement during hydrostatic testing provides the requirements for the initial survey and the evaluation for acceptance per Appendix B.

If the settlement is beyond that specified then the contractor should provide you with a design analysis which indicates that it is safe to put the tank in operation.

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! Already a Member? Login


News
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