×
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

Lateral or Wye Pipeline Connections

Lateral or Wye Pipeline Connections

Lateral or Wye Pipeline Connections

(OP)
For my entire career, the conventional wisdom in gathering-system engineering within my company was that "Lateral Connections are bad, they tend to split in the crotch with earth movement".

I can't find anything in the codes that supports that "conventional wisdom", and I have a client that says "we've always used them and never had one split open".

Anyone have any experience or guidance on the safety and long-term utility of these 45-degree branch fittings?

David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Lateral or Wye Pipeline Connections

As rasr as steel goes they are generally not a problem if designed and fabricated to AWWA Manual M11.

I have seen problems with PE welded units as the weld factor and NDT arent as good as the parent material.

RE: Lateral or Wye Pipeline Connections

(OP)
Nackra,
Sorry, I should have specified that I'll be working in 10-inch Schedule 40. X-42, ERW steel piping.  I went to the uni-bell site and the Tech Bulletin anyway and there wasn't anything there on 45 degree tees (Wye or Lateral connections).  Did I miss something?

David

RE: Lateral or Wye Pipeline Connections

We design, manufacture, and sell them everyday.
As a design start point we use the old MW Kellogg
piping design standard. (pressure area method)

We have not had any trouble with splitting in the crotch.

We strictly manufacture a forged fitting. The splitting
problem probaly occured in a fabricted fitting.

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