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oranje24
Active Contributor

Join Date: May 2011
Posts: 13

Seamless vs Welded Pipe

12/22/2011 9:39 AM

guys,

1. what is pro and cont by using any type of pipe above?

2. when is normally seamless or welded pipe been selected?

3. can a welded pipe replace a seamless pipe? what need to be checked?

4. how to weld a welded pipe with a thickness of 1.2mm?

5. what / where should i refer for this issue?

thanks
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lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Seamless vs Welded Pipe

12/22/2011 9:43 AM

Try one of these: List of welding codes - Wikipedia, the free encyclopedia

Without more information that's about it.
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PennPiper
Guru
Engineering Fields - Piping Design Engineering - Retired Piper

Join Date: Feb 2007
Location: Bayonet Point, Florida
Posts: 635
Good Answers: 61
#2

Re: Seamless vs Welded Pipe

12/22/2011 11:37 AM

SMLS (seamless) pipe is normally stronger then ERW (electric resistance welded), but money normally controls what is used.

Some Clients will not allow welded piping inside the battery limits of Process Units. The reason for this is that if a SMLS line is decommissioned they want to be able to reuse it for another service. They do allow ERW pipe to be used for piping in off site tank areas.

Both will work, and some ERW pipe approaches the strength of SMLS (DSAW - double submerged arc welded), but in "fragile" areas like offshore, its best to be safe then sorry so SMLS is used exclusively as directed by codes & company standards.

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skofitting
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Join Date: Dec 2011
Posts: 8
#3
In reply to #2

Re: Seamless vs Welded Pipe

12/23/2011 1:53 AM

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