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

Using jacks for reducing out-of-roundness

Using jacks for reducing out-of-roundness

Using jacks for reducing out-of-roundness

Dear members,
Hope you are all well

What would happen if a contractor uses hydraulic jacks for reducing out-of-roundness and fit up circumferential weld joints under the pressure of jacks (shell to shell & shell to head joints)?

- Longitudinal weld of shells has been welded after rolling
-Maximum out-of-roundness is limited to 0.3% according to spec. Currently, out-of-roundness of shell is over 1.2% and contractor uses hydraulic jacks to fit up joints.

Literally, my concern is that the pressure vessel will be under cyclic pressure during service and service is hydrogen gas.
I would appreciate any reference in codes and standards related to this problem.

Appreciating your time and help,
Thanks and regards

RE: Using jacks for reducing out-of-roundness

No problem.


RE: Using jacks for reducing out-of-roundness

Done often. No real problem.

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


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