Title:
MANUFACTURING METHOD FOR ELECTRO-SEAMED STEEL PIPE
Document Type and Number:
Japanese Patent JP2017131953
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method for an electro-seamed steel pipe equipped with a seam having no weld flaw.SOLUTION: In an electro-seamed steel pipe manufacturing method, an electric-resistance welding is performed by keeping such a ΔL/t value as is calculated from a distance ΔL (mm) between an external surface deposition position 5a, at which the external surface 1a of an electro-seamed steel pipe is welded by an electro-resistance welding, and an inner surface deposition position 5b, at which the inner surface 1b of the electro-seamed steel pipe is welded, and the thickness t(mm) of the steel plate is kept within the range of 0≤ΔL/t≤1.SELECTED DRAWING: Figure 3
Inventors:
SHIROSAWA HIROYUKI
SATO HIDEO
SATO HIDEO
Application Number:
JP2016015060A
Publication Date:
August 03, 2017
Filing Date:
January 29, 2016
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
B21C37/08; B23K13/00
Domestic Patent References:
| JPH05261564A | 1993-10-12 | |||
| JPH07204863A | 1995-08-08 | |||
| JPH08155656A | 1996-06-18 | |||
| JPH06246484A | 1994-09-06 |
Foreign References:
| US5889262A | 1999-03-30 |
Attorney, Agent or Firm:
Kenichiro Ochiai