Title:
IMPEDER FOR MANUFACTURING WELDED PIPE
Document Type and Number:
WIPO Patent Application WO/2003/013777
Kind Code:
A1
Abstract:
An impeder for manufacturing a welded pipe which has an insulating case (4) and, housed therein, a laminate (10) of coated steel sheets (8) each having a steel sheet having a thickness of 0.3 mm or less and, formed on the surface thereof, an insulating coating film, characterized in that the steel sheet contains 1.5 to 20 % of Cr and 2.5 to 10 % of Si, has a total content of C and N of 100 ppm or less, contains one or more of Al, Mn and P in amounts of 5 % or less, 1 % or less and 1 % or less, respectively, the balance of the steel being Fe and inevitable impurities, and preferably the steel sheet has a resistivity of 60 μ&ohm · cm or more.
Inventors:
TOYOOKA TAKAAKI (JP)
OKABA TAKATOSHI (JP)
ITADANI MOTOAKI (JP)
ARATANI MASATOSHI (JP)
KONDO OSAMU (JP)
OKABA TAKATOSHI (JP)
ITADANI MOTOAKI (JP)
ARATANI MASATOSHI (JP)
KONDO OSAMU (JP)
Application Number:
PCT/JP2001/006662
Publication Date:
February 20, 2003
Filing Date:
August 02, 2001
Export Citation:
Assignee:
KAWASAKI STEEL CO (JP)
TOYOOKA TAKAAKI (JP)
OKABA TAKATOSHI (JP)
ITADANI MOTOAKI (JP)
ARATANI MASATOSHI (JP)
KONDO OSAMU (JP)
TOYOOKA TAKAAKI (JP)
OKABA TAKATOSHI (JP)
ITADANI MOTOAKI (JP)
ARATANI MASATOSHI (JP)
KONDO OSAMU (JP)
International Classes:
B23K13/02; B23K31/02; H05B6/10; B23K13/08; (IPC1-7): B23K13/08; H05B6/10
Foreign References:
| JP2001212677A | 2001-08-07 | |||
| JPS5850186A | 1983-03-24 | |||
| JP2000052059A | 2000-02-22 | |||
| JPS5924587A | 1984-02-08 |
Other References:
See also references of EP 1413383A4
Attorney, Agent or Firm:
Kobayashi, Eiichi (Honcho 6-chome Funabashi-shi Chiba, JP)
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