| 摘要 |
PROBLEM TO BE SOLVED: To provide an insertion degree-confirming ring which can reliably connect pipes without putting a mark or the like and permits visual confirmation when connecting a flexible pipe to a pipe coupling body.SOLUTION: An insertion degree-confirming ring to be inserted to a tubular cover body a of a flexible pipe 1 in which a flexible tube 2 of a necessary length is exposed is inserted from the side of wider inner diameter of the flexible pipe 1 and the insertion fitting is performed until a protrusion part 3a on which the inner diameter of the insertion degree-confirming ring is narrowed is hooked by a cover end 1b of the flexible pipe and, thereby, is stopped. |
