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qaqcpipeman
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Join Date: Sep 2006
Location: Western Pennsylvania, USA
Posts: 761
Good Answers: 9

"Black Weld"

12/30/2010 9:10 AM

I just completed a Quality Oversight on a rather large ERW order at a major North American Pipe Mill and found a few indications that answered some old questions that have been nagging me and offered quite a bit of insight into the whys of how things are caused.

Please review the embedded photo and share your thoughts!

The pipe in question is 24"D x 0.375"W and this coupon shows the a sample of the "black welds" that was discovered.
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Milo
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Join Date: Jul 2006
Location: "Dancing over the abyss."
Posts: 4884
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#1

Re: "Black Weld"

12/30/2010 10:15 AM

top third of photo didn't post.

Milo

__________________
 People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe
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qaqcpipeman
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Join Date: Sep 2006
Location: Western Pennsylvania, USA
Posts: 761
Good Answers: 9
#2
In reply to #1

Re: "Black Weld"

12/30/2010 11:20 AM

I cut it off purposely to hide potential identification of the pipe mill.

It just shows a recognized in house numbering system for identification.
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