| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an in-core capable of easily and surely finding a joint insufficiently inserted into a joint body of a pipe in the pressure inspection in the execution of work. SOLUTION: Seal rings 27a, 27b as sealing members are fitted in the joint body 18, and a clearance between an outer peripheral face of the pipe 11 and an inner peripheral face of the joint body 18 is sealed by the seal rings 27a, 27b in inserting the pipe 11 into the joint body 18. The in-core 13 is composed of a metallic cylindrical part 14 and an annular flange part 15 formed at its one end and outwardly extended to be perpendicular to the cylindrical part 14. An approximately square through-hole 16 in plane, is formed on one end of the cylindrical part 14, and the water flows out from the through hole 16 when the pipe 11 is insufficiently inserted into the joint body 18, whereby a defective can be easily and surely found.</p> |
