| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping material which can reduce a use amount of metal, can reduce man-hours of piping construction, can suppress the extrusion of a bent part and a branched part of a joint, and can be adapted to construction in a narrow space, and its manufacturing method.SOLUTION: A complex pipe fused part 31 is formed at one end of a thermal plastic resin extrusion molding pat 3a constituting the external peripheral side of a joint 1a having a bent part 13a, an outer layer 2a and an inner layer 2b formed of thermal plastic resins, and a diameter-expanded part 22 and a flange-shaped lock part 23 which are formed at the pipe end of a processed complex pipe 2 having a metal-made intermediate layer 2c are surrounded by the complex pipe fused part 31 from the outside and inside, the diameter-expanded part 22, the outer layer 2a and the inner layer 2b of the flange-shaped lock pat 23 are fusibly integrated to the complex pipe fused part 31 at its entire periphery, and a non-processed part 21 of the processed complex pipe 2 is made to extrude to the outside from the joint 1a. |
