| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric resistance welded tube manufacturing method in which a shape of a width end immediately before the electric welding is forme into an adequate shape, thereby sufficiently discharging a molten steel during the electric welding, reliably removing any penetrator, and obtaining the electric welded tube having the excellent weld characteristic. SOLUTION: A grinding means 11 for giving the taper shape to an upper surface side and a lower surface side of right and left width ends of a strip 20 is provided on an outlet side of a first break-down stand 3. COPYRIGHT: (C)2007,JPO&INPIT
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