Patent ID: 9371946
Filing Date: 2016-06-21
CPC Classification: F16L

Claim Text:
1. A pipe joint for preventing a generation of fine particles comprising: first and second joint members having fluid channels communicating with each other; a sealing device configured to seal an abutting portion between the both joint members; and a nut configured to couple the joint members with respect to each other, wherein the nut is formed with a Co—P alloy metal coating on an inner surface thereof, wherein a fluorine coating is applied on the surface of the Co—P alloy metal coating; a thickness of the Co—P alloy metal coating ranges from 0.1 μm to 10 μm; a P content for the Co—P alloy is 3% to 10%; the fluorine coating is polytetrafluoroethylene; and a thickness of the fluorine coating ranges from 10 nm to 1 μm.