×
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

CAN THIS BE WELDED THIS WAY

CAN THIS BE WELDED THIS WAY

CAN THIS BE WELDED THIS WAY

(OP)
So I am designing a manifold out of 1" stainless pipe. the ID is around 1.0979"= 27mm, now I want to add a branch off this not a coupling, but anotehr piece of the same size pipe. My question is whats the best way to join them. I am not sure if I would make a large hole in the long pipe and try to push the shorter pipe into the longer one of cut out a groove on the smaller one as you can see in pic and then weld around. operating pressure around 5psi, up to 30psi. Also how would you cut that groove around the pipe if thats the best option??

RE: CAN THIS BE WELDED THIS WAY

(OP)
wouldnt the bottom pipe get weak if you cut that deep of a groove into the pipe

RE: CAN THIS BE WELDED THIS WAY

Why don't you purchase a Tee of the same pipe size and schedule and make only circumferential butt welds joining the Tee to the spools. This is typical for manifold construction.

RE: CAN THIS BE WELDED THIS WAY

(OP)
I don't have the rom, what I am joining into is only a couple inches below that longer pipe, no room to have a Tee then another pipe

RE: CAN THIS BE WELDED THIS WAY

In that case, I would use the stub in branch as a Tee connection and check what reinforcement is needed on the branch using B31.3 code.

RE: CAN THIS BE WELDED THIS WAY

Left & right representations are preferred by ASME, but both require full-penn welds. If you use the middle detail "birdsmouth cut" and do not achieve full penn and a fairly smooth root, you have generated a major stress-riser in an unreinforced area. Anticipate spectacular failures.

RE: CAN THIS BE WELDED THIS WAY

(OP)
thanks

RE: CAN THIS BE WELDED THIS WAY

If the sketch provided is accurate, the butt-weld pipe fitting shown below should work just fine.

RE: CAN THIS BE WELDED THIS WAY

(OP)
Thanks everyone

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