Title:
PIPE JOINING METHOD
Document Type and Number:
WIPO Patent Application WO/2002/012772
Kind Code:
A1
Abstract:
A method which, in attaching a stiffening ring (3b), a lock ring (11), and a stop ring (15) to the outer surfaces of steel pipes, corrects peaking which occurs in the pipe joint and these rings; a method which, in attaching a joint ring (2) to the inner surface of a steel pipe, corrects peaking which occurs in the joint ring (2), a method of producing a stiffening ring (3a) utilized in the above-mentioned joint; a construction for a packing (6) used in the joint; a method of laying steel pipes having the joint; and a seal surface construction for the joint. According to the pipe joint thus produced, manufacture of pipe joints in a factory can be unmanned and the field operation can be simplified.
Inventors:
TAKEI NORIO (JP)
Application Number:
PCT/JP2001/006808
Publication Date:
February 14, 2002
Filing Date:
August 08, 2001
Export Citation:
Assignee:
WAMONDE CO LTD (JP)
TAKEI NORIO (JP)
TAKEI NORIO (JP)
International Classes:
F16L1/036; F16L25/00; F16L37/098; (IPC1-7): F16L37/12; B21C37/00; B21D3/14; B23K9/025; B23K31/00; F16L1/00; F16L21/00; F16L21/08
Foreign References:
| JPH03219187A | 1991-09-26 | |||
| JPH01229188A | 1989-09-12 | |||
| JPS59199117A | 1984-11-12 | |||
| JPS501060A | 1975-01-08 | |||
| JPH074571A | 1995-01-10 | |||
| JPS61152889U | 1986-09-22 | |||
| JPH10153276A | 1998-06-09 | |||
| JPS494005U | 1974-01-14 | |||
| JP2000088181A | 2000-03-31 |
Attorney, Agent or Firm:
Kato, Takashi (Ichigaya Honmura-cho Shinjuku-ku Tokyo, JP)
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