COUPLING FOR METAL FLEXIBLE PIPE

• Main Authors: SATO FUMITAKA, UENO TOSHIYUKI, OKI KATSUHIRO, ANAMIZU TAKASHI, FUJIYOSHI MINORU
• Format: Patent
• Language: English
• Published: 17.11.2005
• Edition: 7
• Subjects: BLASTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a coupling for a metal flexible pipe, capable of securely detecting a leakage caused by wrong nailing at inspection time and taking a nailing safety measure. SOLUTION: In this coupling having a coupling main body and a nut and for connecting the metal flexible pipe in which an external face of a metal corrugated pipe is coated with a synthetic resin layer, a passage through which gas passes and which communicates a gap for passing of gas between the metal corrugated pipe and the synthetic resin layer with outside of the coupling is provided in the coupling main body and/or the nut. The passage through which gas passes is closed by a selective permeation member for allowing permeation of gas but preventing permeation of solid and liquid, in the state where the gas permeability of the selective permeation member is adjusted. COPYRIGHT: (C)2006,JPO&NCIPI