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This thread is carried over and continued in the Current Elsmar Cove Forums 
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This thread is carried over and continued in the Current Elsmar Cove Forums
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The New Elsmar Cove Forums
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 The New Elsmar Cove Forums
 Miscellaneous Quality Topics
 ERW & Black spots
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| Author | Topic: ERW & Black spots |
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JB unregistered |
posted 12 January 2000 06:24 PM
 
Could someone please tell me how to control black spots. As a QC/NDT Supervisor this defect is driving me nuts not to mention my other plant inspectors. We make tubular products;cold rolled steel (4inch to 8inch)in various gauges. Any info would be greatly appreciable. IP: Logged |
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Marc Smith Cheech Wizard Posts: 4119 |
posted 12 January 2000 09:43 PM
 
I can't personally help you here. Maybe one of the others can. This sounds like it is pretty much process / product specific. Are you talking about black spots on x-rays? IP: Logged |
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JB unregistered |
posted 13 January 2000 10:29 AM
No, not on an x-ray, I wish it was that simple. Black spots, sometimes called penetrators is a steel/process defect in the weld produced in ERW. A non-bonded area in the weld zone. IP: Logged |
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