| 摘要 |
PURPOSE:To provide a method for manufacturing a synthetic resin lining pipe with a spiral rib inside which does not give residual strain to a synthetic resin pipe as an inner pipe and does not make a space between outer and inner pipes at the time of manufacturing. CONSTITUTION:In manufacturing a synthetic resin lining pipe 1 with a spiral rib inside which has a synthetic resin inner pipe 12 with multilined spiral rib 13 inside and a metallic outer pipe surrounding the inner pipe 12, at least either the outside of the synthetic resin pipe as an inner pipe 12 or the inside of the metallic pipe as an outer pipe 11 is coated with an adhesive. With the synthetic resin pipe inserted into the metallic pipe, the metallic pipe is contracted by a contracting device so that a diameter contraction ratio of the outer diameter of the inner pipe 12 to the outer diameter of the synthetic resin pipe is 4%, or less. |
