×
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

Lifting Trunnion on a cylindrical shell?

Lifting Trunnion on a cylindrical shell?

Lifting Trunnion on a cylindrical shell?

(OP)
Hello,

I am trying to determine the stress in a cylindrical shell due to a longitudinal moment caused by lifting from a trunnion.  I wish to lift a stack by two circular trunnions spaced 180 degrees apart near the top of the stack.  API 650 has an appendix for nozzle loading which is close to my scenario but has some fundamental differences:
 a) API 650 assumes the tank shell has a penetration through it, where a trunnion would be welded on the outside with no hole cut in the shell.

b) Tanks have a floor, which a stack does not, however there are stiffening rings on the stack.

I guess what I am looking for is some advise on what direction I should be looking in either a certain code or standard or a technical paper that may addresses this issue.

Thanks,

RE: Lifting Trunnion on a cylindrical shell?

You need WRC 297, WRC 107, or software or vessel books with similar (but simplified) design approaches.

If I remember right, one of the load cases of WRC 297 is a nozzle that is "rigid", ie, a rigid plug attached to the shell at that point, which should work for what you're after.

RE: Lifting Trunnion on a cylindrical shell?

derekmc1 (Mechanical)

Technical Note: Do advance serach "Dennis Moss" or Lifging Lug.

Moss Book give details for the design of Lifting Trunnion on a cylindrical shell

the other option is Engineering Software Tool's: Codeware COMPRESS www.codeware.com or FE-Pipe www.paulin.com

RE: Lifting Trunnion on a cylindrical shell?

See Bednar's "Pressure Vessel Design Handbook" Ch 7 for a simplified version for local loads on shells

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