View Single Post
Old 12-06-05, 03:08 PM
  #18  
Kogswell
Matthew Grimm / Flunky
 
Kogswell's Avatar
 
Join Date: Jan 2005
Posts: 656
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by e-RICHIE
it's seamed; that's how the pipe is fabricated.
it's a layer of metal, rolled, and turned into
a tbe by welding it shut. afterwards, the weld
is completely removed by mechanical means.
at the end of the day, there is NO seam.

What Richie-issimo said.

It's really a remarkable process. The weld is made via rollers that pass current through the lapped seam. No filler material is added. And the tubes are then 'cold worked' to restore the grain. As RS said, this is how it's done.
Kogswell is offline