The metal winding gasket is designed in the design of the flange, according to the size of the spacer, 2 to 8 positioning belts on the periphery of the gasket, so that the positioning strip is buckled on the flange hole to prevent the installation time. Displacement or falling off, currently used in pipelines, valves, pressure vessels, condensers, heat exchangers, towers, human holes, hand holes, etc. in oil, chemical, metallurgy, electricity, ship, machinery, etc.
