Flange gasket is a can produce plastic deformation, and have a certain strength of the material made of the ring.
It is high temperature, high pressure, corrosion resistance, with good compression and rebound rate. Most of the gaskets are cut from non-metal plates, or made by professional factories according to the specified size. The materials are asbestos rubber sheets, asbestos sheets, tetrafluoroethylene sheets, polyethylene sheets, etc. Also useful are thin metal sheets (tinplate, Stainless steel) asbestos and other non-metallic materials wrapped up made of metal pads; there is a thin strip of steel and asbestos with the winding from the wound gasket, the most commonly used is stainless steel and graphite winding The metal spiral wound gasket, depending on the use of the environment, winding belt can also use asbestos. Ordinary rubber gasket for temperatures below 120 ℃ occasions; asbestos rubber gasket for water vapor temperature of less than 450 ℃, the oil temperature is less than 350 ℃, the pressure is less than 5MPa occasions, the general corrosion Medium, the most commonly used acid asbestos board. In high-pressure equipment and piping, the use of copper, aluminum, 10 steel, stainless steel lens or other shapes made of metal gasket. High-pressure gaskets and sealing surface contact width is very narrow (line contact), sealing surface and gasket processing finish higher. Low pressure small diameter wire flange, high pressure and low pressure large diameter welding flange are used, the pressure of the flange thickness and connecting bolt diameter and the number is different. It is often used in petroleum, chemical, power, metallurgy, shipbuilding, paper, medicine and other connections at the pipe, valves, pumps, manholes, pressure vessels and heat exchange equipment sealing parts.