Welded tubing from which the inner diameter flash formed during the welding operation has been removed by some mechanical method. It can be furnished in either the as-welded, sunk, or heat-treated condition.
The Fabricator Blog
Fabricating a copper chimney cap - by Nick Martin Custom fabricating shops bid all kinds of jobs. Sometimes these jobs involve materials and processes beyond those the shop typically encounters. They make for interesting work that can require brushing up on little-used skills. Building a copper chimney cap was just such a job for Barnes MetalCrafters, one that resulted in a beautiful, functional work of art.
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