×
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

Fig UW 13.1

Fig UW 13.1

Fig UW 13.1

(OP)
These sketches show how we are to design a head to shell joint, when, as is often the case,  the head and shell have different thicknesses.  I'm sure all fabricators order the heads so the centerline offset falls into that allowed by this Code section.( </= 1/2 (th-ts))  Our practice is to wait until we have received the heads to cut and roll shell plates so that we can closely match them up, but, I've talked with others that say the 'design' aspect ends with the order for the heads, after that they apply UW 33 tolerances to the edges at fit up.  I'd be interested in your opinions.

RE: Fig UW 13.1

My shop experience was also that the shells were cut and rolled AFTER the formed heads were received and taped.

Joe Tank

RE: Fig UW 13.1

We order ours to the ID or OD of the vessel

Our head manufacturers hold tight tolerances and they match up very well.

Any small deviation is handled in the weld seam for a smooth transition.

Our schedules are too tight to wait on heads to roll and weld shell cans.

We have not experienced any problem whatsoever meeting/exceeding code/customer expectations in these joints.

RE: Fig UW 13.1

My experience has been similar to vesselfab's. I don't normally see a very large difference in thickness between shell and head anyway.

Regards,

Mike

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