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Gaskets are normally made from a flat material, a sheet such as paper, rubber, silicone, metal, cork, felt, neoprene, nitrile rubber, fiberglass, polytetrafluoroethylene (otherwise known as PTFE or Teflon) or a plastic polymer (such as polychlorotrifluoroethylene).

Flange insulation group is one of the most common, effective and important connection forms in petrochemical plants, natural gas plants, offshore oil projects, etc. Various pipelines, pipe fittings, valves, instruments and equipment, flange insulation groups have unique performance and advantages. Use insulation kit seals on flanges to protect your pipes from the risk of leakage, sealing is achieved by the fit of flanges, insulating washers, bushings, washers, washers, bolts and nuts. Flange junction is connected and sealed to prevent medium leakage at the flange junction, as well as anti-corrosion and conductive insulation Protect.

A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression.

The premise is simple in that a sheet of material has the gasket shape "punched out" of it. This leads to a very crude, fast and cheap gasket. In previous times the material was compressed asbestos, but in modern times a fibrous material such as high temp graphite is used.

The idea behind solid material is to use metals which cannot be punched out of sheets but are still cheap to produce. These gaskets generally have a much higher level of quality control than sheet gaskets and generally can withstand much higher temperatures and pressures.

Spiral-wound gaskets comprise a mix of metallic and filler material. Generally, the gasket has a metal (normally carbon rich or stainless steel) wound outwards in a circular spiral (other shapes are possible) with the filler material (generally a flexible graphite)