SCREWED TYPE PIPE JOINT

摘要

PROBLEM TO BE SOLVED: To provide a screwed type pipe joint for easily and visually checking a tightening state of a metallic pipe and solving lack of tightening problems. SOLUTION: A gap between an inner periphery of a sleeve 5 of a corrosion-proof coating 4 of a joint body 1 and an outer periphery of an end of a metallic pipe 7 is sealed by a circular packing 10. A confirmation mark 12 for tightening a metallic pipe is arranged on an outer peripheral surface of the circular packing 10. COPYRIGHT: (C)2004,JPO