SYNTHETIC RESIN TWO-LAYERED CORRUGATED PIPE, AND REPAIR METHOD OF PIPE FOR INSERTING THE SAME CORRUGATED PIPE INTO OVERAGED EXISTING PIPING

摘要

PROBLEM TO BE SOLVED: To provide a corrugated pipe and a repair method of a pipe using the same corrugated pipe capable of smoothly inserting into an overaged, bent existing piping and repairing the existing piping and having strength of the pipe which can prevent leakage of fluid running the inside of the existing piping in spite of damage on the outside of the corrugated pipe in the case of insertion and minimizing pressure loss.;SOLUTION: The corrugated pipe has an outer-layered tubular portion having an approximately waveform on a cross section in an axial direction of a pipe, and an inner-layered tubular portion of the same pitch with the outer-layered tubular portion having an approximately waveform on a cross section in the axial direction of the pipe. The outer-layered tubular portion and inner-layered tubular portion are integrated at a portion only which is a valley portion of the sectioned waveform, and a ridge portion of the inner-layered tubular portion enters into the ridge of the outer-layered tubular portion.;COPYRIGHT: (C)2006,JPO&NCIPI