×
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

Round to Round Transition

Round to Round Transition

Round to Round Transition

(OP)
I am currently designing the bottom of a Reactor that has a "round to round" transition (see attached picture). I was looking at designing it as an eccentric conical transition with an equivalent small end diameter but I am not sure this is the correct approach. Does anyone have any experience (and not just opinion) with designing a code vessel with this type of transition?

The design code is ASME Sec. VIII, Div. 1, and the center line of the small end is 30 degrees from the large end center line.

Thanks!

RE: Round to Round Transition

This has been discussed before. There are no rules in Section VIII, Division 1 (or Division 2 for that matter) for such a geometry. See U-2(g). You're going to need to get someone to do an FEA-based design for you.

RE: Round to Round Transition

PVEngineerCF, hard to tell from your pic, but the construction appears to resemble a mitered elbow, which in the distant past were designed without the benefit of FEA :)

Unfortunately I do not know how they were designed. My apologies.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

RE: Round to Round Transition

(OP)
I appreciate the replies!

I do not completely agree that FEA is necessarily required but I agree that it would go to a U-2(g) analysis.

The only place I know where to look for a mitered elbow design is B31.3 but I do not see how to go about a mitered elbow with differing IDs at each end. Perhaps by assuming the larger ID throughout the "elbow"?

I guess what I am getting at is... Is there a method for designing this type of transition out there that's been used (besides FEA)? If not, then FEA will be the path we go with.

RE: Round to Round Transition

There are good tools for designing mitered elbows without FEA. But not reducing mitered elbows. smile I guess you have your path forward.

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


Resources

White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now

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