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AssigneeNippon Steel Corporation
InventorsSatoru YAMASHITA, Akinobu KOBAYASHI
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Provided is a production method of an electric resistance welded steel pipe, including: an end face-shaping step of forming, on each of a first end face and a second end face on both sides in a width direction of a plated steel sheet, an outer inclined portion inclined in a sheet-thickness direction from a side of an outer surface toward a side of an inner surface or forming the outer inclined portion and an inner inclined portion inclined in the sheet-thickness direction from the side of the inner surface toward the side of the outer surface, the faces each being shaped in such a way that a sheet thickness decreases from a center in the width direction toward the end face; and a pipe-making step of welding the first end face and the second end face both undergone shaping end to end to make a pipe.
A production method of an electric resistance welded steel pipe, comprising:
An electric resistance welded steel pipe, an original of which is a plated steel sheet, comprising:
An electric resistance welded steel pipe, an original of which is a plated steel sheet, comprising,
Dependencies are inferred from the claim text.