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Recent content by wldhair
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Sche 40, ERW pipe quality
The "sandblasted white" color has nothing to do with the foil. The foil is quilted and on the exterior vapor barrier. Believe me. Go out and look at freshly sandblasted metal where the grains of the metal can be seen and you have a white to gray color. That is it. One of you mentioned "bugs"...- wldhair
- Post #8
- Forum: Pipelines, Piping and Fluid Mechanics engineering
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Sche 40, ERW pipe quality
Relative to the coatings question: The only coating would have been the exterior paint to prevent rust from short time storage. Internally there was no coating. I remind you this is an economically driven HVAC installation in a commercial office building. The worst pitting that we have...- wldhair
- Post #4
- Forum: Pipelines, Piping and Fluid Mechanics engineering
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Sche 40, ERW pipe quality
I have read several postings that question the quality of carbon steel pipe today versus that 15 or so years ago. I suspect the only source for carbon pipe material today is from recycled steel from mini mills rather than raw steel from blast furnaces. Recycled steel from mini mills was...- wldhair
- Thread
- Replies: 8
- Forum: Pipelines, Piping and Fluid Mechanics engineering
