Gaskets are commonly found in equipment and piping systems. Their function is to seal against leaks due to pressure and temperature. According to the Fluid Sealing Association standards, gaskets are classified into three categories: non-metallic (soft), semi-metallic, and metallic. Non-metallic gaskets are suitable for general use and corrosive applications. These gaskets are used for low to medium temperatures. Non-metallic gaskets include CNAF, flexible graphite, PTFE, and rubber (NBR, SBR, EPDM, and VITON).
Non-metallic gaskets are available in flat ring (ID/OD) and full face (ID/OD with bolt holes), and can also be custom-made in round or square shapes with or without bolt holes, depending on user/client requirements.
Semi-metallic gaskets are a combination of previously used soft gasket materials, such as filler on the surface or as interlayer fillers, to create composite material characteristics. Composite or non-metallic gaskets generally provide the required structural strength and increased durability. Semi-metallic gaskets can be used for low- to high-temperature and pressure applications, depending on the
Metallic gaskets are ideal for high-pressure and high-temperature applications. Types include ring-type joint (gasket), flat-ring metallic gasket, and Kammprofil without a covering layer.configuration and material used. Types include: Kammprofil with a covering layer, metal-jacketed gaskets, metal-reinforced non-metallic soft gaskets, and spiral-wound gaskets.