Sealing gasket is a kind of sealing spare part used in machinery, equipment, and pipeline as long as it is a place where fluid is used. It uses internal and external materials that play a sealing role. The sealing gasket is made of metal or non-metal plate material, which is made by cutting, punching or cutting. It is used for the sealed connection between pipes, and the sealing connection between the mechanical parts of machine equipment and the mechanical parts. According to the material can be divided into metal gaskets and non-metallic gaskets. There are copper gaskets, stainless steel gaskets, iron gaskets, and aluminum gaskets. Non-metallic asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, etc.