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?
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
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
Check Technical Bulletin: Installation Guide for Risers
RE: Lateral or Wye Pipeline Connections
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
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.