| 摘要 |
PROBLEM TO BE SOLVED: To provide a coupling structure for high pressure piping in which a high accuracy of processing is unnecessary to a seal seat surface, as well as a screwing fastening is unnecessary, and the time of the fastening work can be reduced. SOLUTION: In this coupling structure for high pressure piping, a tube body 36 having a fitting seal seat 34 at the tip is connected to a tube body 32 to be connected having a step form of receiver seal seat 28 at the middle part of a hole 26. Between the receiver seal seat 28 of the connected tube body 32, and the fitting seal seat 34 of the tube body 36, a gasket 38 made of a metal or a high polymer material favorable to the seat seats 28 and 34, and possible to contact closely to them, is provided, and the tube body 36 presses the gasket 38, so as to make the receiver and the fitting seal seats 28 and 34 in a sealed condition. |
