Thin-walled stainless steel pipe and fittings of the connection mechanism

摘要

PROBLEM TO BE SOLVED: To prevent easily falling out of a packing from a packing fitting part of a joint, in the case of fixing an external thread part of the joint threadedly engaged with an internal thread part of a nut fitted into a thin thickness stainless steel pipe. ;SOLUTION: A device is constituted by a thin thickness stainless steel pipe 1 formed with a mountain-shaped protrusion part 5 in an end part periphery, joint 2 having an internal diameter inserting the thin thickness stainless steel pipe 1 also formed with a packing periphery fitting part 6 in an end part, nut 3 having a fitting part 10 opposed to the joint 2 and the mountain type protrusion part 5 to be as a border externally fitted to the thin thickness stainless steel pipe 1 also having an internal thread part 11 screwed to an external thread of the joint 2, and a packing 4 provided between the joint 2 and the thin thickness stainless steel pipe 1. In the case of fixedly threadedly engaged the internal thread part 11 of the nut 3 with the external thread of the joint 2, in an external diametric surface of the joint 2 threadedly engaged with the internal thread part 11 of the nut 3, a marker 5 consisting of material having flexibility and elasticity is externally fitted so as to be buried, in an outer surface of the marker 5, a part protruded to outward from an external diametric surface of the joint 2 is provided.;COPYRIGHT: (C)1998,JPO