| 摘要 |
PROBLEM TO BE SOLVED: To provide resin pipes enabling the proper setting of the insertion tolerance dimensions thereof when the resin pipe is inserted into joints and easy designing and piping operations of the joints by reducing the the types of the resin pipes for any of the plurality of joints with different insertion depths. SOLUTION: A plurality of lines 22 and 23 with multiple types of insertion tolerances are alternately formed, from its tip 21a side, on the outer peripheral surface of the resin pipe 21 at non-equal intervals in the longitudinal direction of the resin pipe 21 so as to cope with a difference in the insertion depth dimension of the multiple types of joints. For the joint short in the insertion depth dimension, the resin pipe 21 is inserted to the first line 22 from its tip. For the joint with long insertion depth dimension, after the resin pipe 21 is cut at the first line 22 from its tip, it is inserted into the joint to the first line 23 from its tip. COPYRIGHT: (C)2006,JPO&NCIPI
|
