| 摘要 |
<p>PROBLEM TO BE SOLVED: To fit a branch joint to a composite high-pressure pipe in a state securing the strength (internal pressure resistance) of a fitting part. SOLUTION: The branch part of the composite high-pressure pipe 1 is disposed with a thermoplastic resin joint body 20 integrally formed with a saddle part 21 which has an inside shape extending along the outer circumferential surface of the composite high-pressure pipe 1 and a branch pipe connecting part 22, and the branch joint 2 having a heating wire buried in the saddle part 21. The heating wire is energized with the inside of the saddle part 21 contacted with the outer circumferential surface of the composite high-pressure pipe 1 so as to fuse the inside of the saddle part 21 and the outer circumferential surface of the composite high-pressure pipe 1, and then a through-hole 1a is formed in the branch part of the composite high-pressure pipe 1. The fitting work is performed by the above process so as to suppress the relaxation of a drawing polyolefinic resin sheet in the heat fusion.</p> |
