Title:
METHOD FOR MANUFACTURING WELDED STEEL PIPE
Document Type and Number:
Japanese Patent JP2012166234
Kind Code:
A
Abstract:
To provide a method for manufacturing a welded steel pipe excellent in the quality of a welded part and capable of improving production efficiency.
In the method for manufacturing the welded steel pipe, a linear seam pipe stock 2 is formed by continuously and tubularly bending a steel strip 1, and a seam part of the pipe stock is welded. Only the portion of 1/2-1/8 thickness of the pipe stock in an inner surface side of the seam part of the pipe stock is high-frequency welded 3, and an inner surface weld bead 30 and an outer surface weld bead 31 in the weld part are cut and removed just after welding. Next, the outer side surface of the seam part is welded 4 by submerged arc welding.
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Inventors:
TODO KUNIO
KIN ICHIKO
JOCHI NORIO
KIN ICHIKO
JOCHI NORIO
Application Number:
JP2011028947A
Publication Date:
September 06, 2012
Filing Date:
February 14, 2011
Export Citation:
Assignee:
JTE KK
International Classes:
B23K28/02; B21C37/08; B23K9/025; B23K9/18; B23K13/00; B23K37/08
Attorney, Agent or Firm:
Hajime Wada