Butt welding flange

Mengcun Flange Sealing Gasket is a kind of sealing spare parts used for machinery, equipment and pipelines as long as there is fluid. It uses internal and external sealing materials. Flange gaskets are made of metal or non-metal plate material, which are made by cutting, stamping or cutting. They are used for sealing connection between pipes and sealing connection between machine parts and machine parts. According to the material, it can be divided into metal gasket and non-metal gasket. Metal has copper gaskets, stainless steel gaskets, iron gaskets, aluminum gaskets, etc. Non-metallic asbestos gaskets, non-asbestos gaskets, paper gaskets, rubber gaskets, etc. First of all, the development trend of rubber materials for rubber and plastic gaskets for flange connection: special engineering elastomers to replace low-performance oil-resistant rubber rubber materials, low-friction modified rubber, limit modification, injection pressure, solid and liquid elasticity body. The application of engineering plastics is increasingly important. Polytetrafluoroethylene (PTFE) has excellent low friction properties and its application has been extensive and mature. Adding PTFE composite materials to engineering plastics with good mechanical strength can give full play to the advantages of the two materials. Secondly, the rubber-plastic gasket used for flange connection is a high-performance polyurethane material. The general polyurethane material can only be used for a long time below 80 °C. Parker polyurethane can withstand 120 ° C after high temperature modification and 145 ° C for short time. Excellent compression set. Infiltrating the PU material with a self-lubricating modification liquid (including MoS2, etc.) to reduce its friction coefficient to promote the application of PU in pneumatic and high-speed sealing. As environmental protection concepts increase, seals used under aqueous media conditions are increasing. It is necessary to substantially improve the hydrolysis resistance of PU materials in terms of material structure. Further research and application of engineering ceramic seals (including polymer) engineering ceramics have excellent chemical resistance and temperature resistance. With the development of sealing technology, there will be certain application prospects in sealing components. Especially after engineering ceramics are modified by polymers (so-called "polymer ceramics"), the elasticity and toughness are improved.