Seam free welded pipe

C - Chemistry – Metallurgy – 21 – D

Patent

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Details

C21D 8/10 (2006.01) B21C 29/00 (2006.01) B21C 37/06 (2006.01) B21C 37/08 (2006.01) B21C 37/30 (2006.01) F16L 9/02 (2006.01)

Patent

CA 2253323

A process for forming a cylindrical pipe from a welded metal pipe stock by roll extruding and annealing whereby the weldment microstructure forming the seam is essentially reformed to provide a recrystallized grain structure which is substantially homogeneous with the parent material of the pipe stock.

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