Dual seam electric resistance welded tubes
AssigneeDfi, Inc.
InventorEric BERUBE
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Abstract
A method of continuously forming a dual seam welded tubular product includes the steps of providing two coils of sheet metal material, uncoiling the two coils and forming the material into opposing sections, bringing the two opposing sections together at a convergence angle of less than about 4°; and welding the two seams created between the two opposing sections. An apparatus is configured to bring the sections together at a convergence angle less than about 4° to produce the tubular product. The tubular product may have a diameter greater than 26 inches.
Claims5
A dual seam welded tubular product, having a diameter greater than about 26 inches comprising a generally semi-circular first half-tube formed from a first coil of sheet metal material, a generally semi-circular second half-tube formed from a second coil of sheet metal material, wherein the first half-tube and the second half-tube are brought together and welded to form a tube with two seams.
Dependencies are inferred from the claim text.