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Tubing Manufacture

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There are three classes of manufactured tubing: seamless,[1] as-welded or electric resistant welded (ERW), and drawn-over-mandrel (DOM).Seamless tubing is produced via extrusion or rotary piercing.Drawn-over-mandrel tubing is made from cold-drawn electrical-resistance-welded tube that is drawn through a die and over a mandrel to create such characteristics as dependable weld integrity, dimensional accuracy, and an excellent surface finish.

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