Title:
COOLING METHOD FOR WELDED STEEL TUBE
Document Type and Number:
Japanese Patent JP3270719
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a cooling method capable of preventing an uneven welding by a highly accurate distribution of the coolant in the peripheral direction at the outer side of a welded steel tube, keeping the temperature at the starting point of reducing mill process and the temperature deviation in the peripheral direction within an appropriate extent.
SOLUTION: In a method to forcefully cool down a jointing area of a steel tube 10, after its reducing mill process and before its pressure welding, by injecting the coolant 12 from a nozzle 11, to the jointing area of the steel tube. A slit 13 is installed between the nozzle and the jointing area, to adjust its slit width W and slit height H according to the size of high temperature area 16 including jointing area, and the coolant is injected from the nozzle to the jointing area through said slit.
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Inventors:
Masao Shoji
Masahiro Kagawa
Koji Sugano
Yoshinori Sugie
Hisao Ohnishi
Nobuki Tanaka
Takaaki Toyooka
Akira Ito
Taro Kanayama
Masahiro Kagawa
Koji Sugano
Yoshinori Sugie
Hisao Ohnishi
Nobuki Tanaka
Takaaki Toyooka
Akira Ito
Taro Kanayama
Application Number:
JP21626497A
Publication Date:
April 02, 2002
Filing Date:
August 11, 1997
Export Citation:
Assignee:
Kawasaki Steel Co., Ltd.
International Classes:
B21B45/02; B21C37/08; (IPC1-7): B21B45/02; B21C37/08
Domestic Patent References:
| JP8174039A | ||||
| JP2138084U |
Attorney, Agent or Firm:
Eiichi Kobayashi