B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/40
B23K 9/02 (2006.01)
Patent
CA 1129016
- 14 - Abstract of the Disclosure A method of longitudinally seam-welding steel pipes comprises the steps of setting a conductive net-like enclosure tube around a cabtyre cable for supplying a direct electric current from the power source to the welding head; and conducting a direct electric current through the enclosure tube in a direction opposite to that in which the direct current runs through the cabtyre cable. Apparatus for longitudinally seam- welding steel pipes comprises a cabtyre cable, a net tube surrounding the cabtyre cable, and a device for supplying a direct electric current to the cabtyre cable and net enclosure tube in the opposite directions, thereby minimizing the magnitude of a magnetic field created around the net enclosure tube and producing a steel pipe seam.
325010
Hirano Osamu
Matsubara Hiroyoshi
Nagamine Takashi
Osuka Tatsumi
Suzuki Motoaki
Nippon Kokan Kabushiki Kaisha
Ridout & Maybee Llp
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