| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new regeneration pipeline and a new method for regenerating the pipeline, and to provide the regeneration pipeline and the method for regenerating the pipeline by which work can be done simply while preventing a new pipe from being damaged. <P>SOLUTION: The regeneration pipeline 10 is formed by pulling a cylindrical protective sheet 14 extended in the coaxial direction with an existing pipeline 30 into the existing pipeline 30 and then inserting the new pipe 12 into the protective sheet 14. The new pipe 12 is formed by butting pipe members 16 made of polyolefin-based synthetic resin against each other and joining them by butt welding. The protective sheet 14 is formed of synthetic resins including polyethylene in a long rectangular flat shape and formed into a cylindrical shape by bending both ends in its width direction toward the center. When the new pipe is inserted into the existing pipeline, no damage occurs on the new pipe, because it is prevented from contacting with projections on the inner surface of the existing pipeline. <P>COPYRIGHT: (C)2013,JPO&INPIT |
