Contact US

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

Does the Circ Joint in a Flanged & Flued expansion joint require full X-Ray?

Does the Circ Joint in a Flanged & Flued expansion joint require full X-Ray?

Does the Circ Joint in a Flanged & Flued expansion joint require full X-Ray?

We are getting some pushback from a Canadian safety authority in their review of our application for CRN on one of our straight tube HX designs. The design contains a simple flanged & flued expansion joint per Appendix 5 and TEMA. The flanged and flued heads we are using are small: 10-3/4" OD on the small end, and 18" OD on the big end, and they are manufactured from a single piece of plate with no welds in the heads. We are doing full VE and LP on both sides of all accessible welds from head to head, and where each head attaches to the shell with a butt-weld per para 5-5(c).

The reviewer in Canada is now insisting that all those welds (the circ weld joining the two heads, and the circ welds attaching the expansion joint to the shell) need to be X-rayed 100% per parap 5-5(b). We (and our AI) do not agree, as para 5-5(b) states that welds within the flexible element need to be examined this way. Para 5-4 defines the flexible element as the flanged and flued head. Not both heads welded together (the expansion joint).

Is our interpretation correct? If so, any guidance on how we might diplomatically present this to the design reviewer at the safety authority in Canada to get them to agree and get this project closed?

-TJ Orlowski

RE: Does the Circ Joint in a Flanged & Flued expansion joint require full X-Ray?

TJOrlowski, I do not believe these circ seams require full RT. I think the operative parts are:

1) 5-4(b)(1) where the weld and by reference the joint effcy is per Table UW-12;

and especially 2) 5-5(c) where no RT whatsoever is mentioned. The language referring to the joining of the individual elements is perfectly clear.

Best of luck with your reviewer.


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

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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