| 摘要 |
PROBLEM TO BE SOLVED: To provide a connection structure between flanges, in which excellent sealing performance can be maintained almost without re-tightening, and the assembling work can be also improved. SOLUTION: In order to communicate a pair of flange pipes 1 and 2 by making circular fluid passages 4 and 4 in a sealing state using an annular gasket G, annular projections 11 and 21 are formed in first and second flanges 1B and 2B. The gasket G has a pair of annular grooves 51 and 51 formed in the external diameter side of a fluid path W so as to be fitted in the annular projections 11 and 21 respectively, and has an H-shaped sectional shape made of fluororesin. A maintaining means I is provided to maintain the connection state in which the annular projections 11 and 21 of the first and second flanges 1B and 2B and the annular groove 51 of the gasket G are fitted with each other by drawing the flange pipe 1 and 2 near to each other to form a fitted seal portion 3. COPYRIGHT: (C)2007,JPO&INPIT
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