| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection structure of a thin thickness and a thin diameter metal pipe which has both corrosion resistance to a fluid containing a corrosive material and hermeticity to molecule structure liquid and fluid such as gas, and which can guarantee excellent sealing performance despite small pressing force to a seal surface. SOLUTION: The anti-corrosive connection structure of a metal pipe is provided with a pipe body in which a double structure pressing seat surface expanded to the outer periphery from the shaft center in the terminal of the metal pipe is formed by bending an expanded terminal part until making a double structure parallel to the shaft center and further the bent terminal of the metal pipe toward the center after coating an inside peripheral surface with resin, rubber or the like and expanding a terminal of a two-layer structure metal pipe in an outer peripheral direction. In addition, the pipe body has a seat surface in which the entire surface of the terminal containing pressing seat surface is coated with resin, rubber or the like. The anti-corrosive connection structure includes a fixing nut with which the pressing surface abuts on a receiving seat surface of a connection objective member to be screwed and fixed. COPYRIGHT: (C)2005,JPO&NCIPI
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