電縫鋼管の曲がり矯正方法および鋼管の製造方法

摘要

PROBLEM TO BE SOLVED: To provide a method by which bending of an electroseamed steel pipe can be suitably corrected.;SOLUTION: According to this method, when an electroseamed steel pipe is advanced so that a seam part is positioned above a pass line in a sizer process, plural stands are located so that centers of sizer rolls at an intermediate stand are positioned above the pass line by a prescribed distance, and when the electroseamed steel pipe is advanced so that the seam part is positioned below the pass line in the sizer process, plural stands are located so that centers of the sizer rolls at the intermediate stand are positioned below the pass line by a prescribed distance. The above-said prescribed distance is set based on a yield stress of a base material of the electroseamed steel pipe and a yield stress of the seam part.;SELECTED DRAWING: Figure 8;COPYRIGHT: (C)2019,JPO&INPIT