×
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

Pipe welded to Flange Hub

Pipe welded to Flange Hub

Pipe welded to Flange Hub

(OP)
Hello Friends,

I have a question on a jacketed ASME VIII Div.1 vessel.
In my design the Jacket closure (0.375" thk) is welded directly to the hub of a WN flange. Is there any section in the code that prohibits such weld? The weld looks vey similar to Fig 9-5 [i-1(a)]. Attached is a drawing for reference.

Thanks & Regards,
TechThrm

RE: Pipe welded to Flange Hub

There's nothing special about that jacket attachment arrangement, and no special flange is needed. If the jacket conditions are significantly higher in pressure than the process side such that the flange rating might be affected, I'd suggest additional analysis, but it's usually the other way around- the jacket is typically a low pressure service. You can do the analysis for the low pressure jacket cases too, but the flange hub on a weld neck is thicker than the flat end plate you'd need to use if you stopped the jacket short of the flange, so it's obvious that it's OK.

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