Pipe rehabilitation method , including the rehabilitation pipe inspection method and rehabilitation pipe inspection process .

摘要

PROBLEM TO BE SOLVED: To provide a renewed pipe line with no uncured part or pinhole by an inspection method which can effectively detect an uncured part or a pinhole hardly detectable by visual inspection in renewal of an old pipe and by a pipe line renewal method including this inspection method.;SOLUTION: A pipe line defect inspection method for a pipe line, wherein a lining material comprising a tubular resin absorbent impregnated with a curable resin is inserted inside the pipe line and the inside of the lining material is cured by heating and pressurizing, includes: a step of forming a clearance between an existing pipe line and the lining material by using a difference of a linear expansion coefficient between them; a step of filling the clearance with water; and a step of inspecting whether there is water leakage from an uncured part or pinhole of the lining material. The linear expansion coefficient of the lining material is larger than that of the existing pipe line, and the clearance is formed between the existing pipe line and the lining material by a shrinkage difference between them in a cooling period after applying the lining material.;COPYRIGHT: (C)2012,JPO&INPIT