Graphite spiral wound gasket sealing flange connection

Design is based on m, y coefficients standard flange gasket, so the design of flange gasket ensure security of the connection flange, but can not determine the sealing flange; metal graphite based wound gasket seal factor Gb, Gs , a design method of a diameter of 15 ~ 40mm standard series of pipe flange bolts in a standard leak rate under load, the quality of leakage rate 0.275 ~ 28.800μg / (s * mm), sealed grade on the economy, between standard grade; diameter of 40mm, a pressure of 1 MPa for pipe flange connections for gas leaks daily capacity 8L (standard condition) the results show that using gasket coefficient based design approach can ensure flange connection tightness.

In the high-temperature test device gaskets, graphite spiral wound gasket conducted performance tests, and obtained a gasket sealing performance varies with temperature curve and fitting formula. Research results show that the gasket has good sealing performance the leakage rate exponential relationship with temperature, increases with increasing temperature, consistent porous media model equations.