Regarding the selection of gaskets
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Besides selecting gaskets based on operating temperature and pressure, how should gaskets be chosen according to the medium?
Both factors need to be taken into consideration. Pressure and temperature are one aspect; it is necessary to determine whether the gasket can be used under those conditions. The type of medium involved also needs to be considered, as some toxic or harmful media require special gaskets.
Check whether the medium dissolves the gasket, whether it reacts with the gasket, and whether the gasket experiences any change in volume after being immersed in the medium. It is also necessary to consider the gasket’s pressure and temperature resistance under these immersion conditions; if possible, it is best to conduct experiments. Fluororubber is generally used, or a EPDM composite gasket coated with tetrafluoroethylene is used.
Rubber asbestos gaskets; widely used in air, steam, gas, hydrogen, brine,
The specific principles for selecting gaskets can be referred to in HG20592 or HG20615
Asbestos gaskets seem to be prohibited from use now; PTFE gaskets are still acceptable
The main consideration is the compatibility between the gasket and the medium.
You should check the \"Chemical Engineering Design Handbook,\" which specifies the types of gaskets to use for different media.
When selecting gaskets, pressure, temperature, and the medium must be taken into consideration. Choose according to the medium: oil-resistant, steam-resistant, or resistant to special media (including those with high corrosivity)
There is a very detailed explanation in HG20584, which can be referred to.
You can search for guidelines on the selection of flange gaskets; there are some guidelines available there, and I hope they will be useful to you……