×
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

station piping

station piping

station piping

(OP)
Hi,
I am looking for some information regarding the pipe fabrication methods. Is there any preference regarding SMLS (Seamless) v ERW (Electric Resistance Welded) v DSAW (Double Submerged Arc Welded) for station piping with MAOP of 650 to 900 psi?
Cheers

RE: station piping

Not really. Cost is the typical deciding factor.

I hate Windowz 8!!!!

RE: station piping

(OP)
Thanks

RE: station piping

Just make d@mn sure that nobody uses Type F piping. Properly refered to as 'furnace welded', but most of us old guys call it Furnace Brazed for a reason.

Under A53, all E [ERW] seams get 100% 'electric' tested [typically eddy-current] at 2" and up. I've never had a problem with type E, just F.

RE: station piping

Some corporate specifications require longseams to be at certain locations (e.g. 10:00 to 2:00, not at 12:00, staggered by 50mm, etc). In this case, seamless would be advantageous.

RE: station piping

Generally speaking, most construction specifications don't allow seamed pipe to be cut or welded on the weld seam. This might be easy if there is only one weldolet or nozzle, but if there are many on one piece of pipe it can become difficult to accommodate this requirement.

Seamless is difficult to get above a certain size range (12 to 16" from memory) so there is little choice above that but below I think you would find seamless generally preferred for piping as pipe is relatively cheap compared to flanges and other fittings and seamless just makes this sort of thing go away.

My motto: Learn something new every day

Also: There's usually a good reason why everyone does it that way

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