What Material Is the Flange Gasket Made of and How to Select It?

What Material Is the Flange Gasket Made of and How to Select It?

What material is the flange gasket made of and how to select it? We all know that the flange gasket is an important tool for sealing between flanges. If the flange is not sealed properly during installation, it will inevitably affect the use of pipe fittings or equipment.

The flange gasket is usually a circular ring shape, and the material used to make that the gasket has great strength and can produce plastic deformation, such as asbestos rubber board, asbestos board, PTFE board, polyethylene board, and other materials. These gasket materials are also commonly seen on the market, mostly cut directly from non-metallic plates, but there are also professional factories that specialize in making them according to specific dimensions. In addition, there is another type of flange gasket that is made by wrapping non-metallic materials such as asbestos with a thin metal plate. Of course, there is also a type of spiral wound gasket that is not wrapped, but is made by winding thin steel strips and asbestos strips together. However, the most commonly used type of spiral wound gasket is still the one made by winding stainless steel strips and graphite.

The flange gasket made of different materials is actually designed to meet the needs of different equipment and fittings. The selection of gaskets is influenced by the requirements of the equipment itself and the environmental temperature of the equipment and fittings used.

If the temperature of your pipe fittings and equipment is below 120 ℃, just use a regular gasket. If the water vapor temperature is higher during equipment use, but not higher than 450 ℃, asbestos rubber gaskets can be selected. If the gasket is used for oil and the temperature is below 350 ℃ and the pressure is below 5MPa, it is recommended to use acid resistant asbestos board. Stainless steel metal gaskets should be used in high-pressure pipelines and equipment.

Gaskets are an important component in flange connections, and when we select them, it is important to make a reasonable selection based on the equipment and pipelines installed on the flange, as well as the environment in which they are used.

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