The combined gasket is a sealing ring used to seal threaded and flanged connections, and the ring includes a metal ring and a rubber gasket. The metal ring is anti-rust, and the rubber ring is generally made of oil-resistant nitrile rubber or fluororubber. Combination gaskets are widely used in pipeline systems with oil as the medium, for static sealing of the end faces of pressure systems for welding, ferrules, enlarged pipe joints, screw plugs and mechanical devices.
