UNUSED INDICATION METHOD OF EMBEDDED PIPE

摘要

PROBLEM TO BE SOLVED: To provide the indication method of unused pipe which can discriminate whether the pipe exposed from the earth is a used pipe or unused pipe easily and also remove a residual pipe easily. SOLUTION: In a first process, the equal interval position of the wall of the pipe P is cut by entering an inner surface cutter device 2 from the opened end Pa side in the embedded pipe P along the circumferential direction and in a second process, a filler R is filled by applying a pressure into the pipe cut at an equal interval in this first process. A ring shape lump for indicating the unused pipe is formed by the filler R projected from the clearance (s) of the cut part of the pipe to the outside of the wall of the pipe P.