When are asbestos gaskets used on chemical plant equipment? What’s the use of a metal pad?
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When are asbestos gaskets used on chemical plant equipment? What’s the use of a metal pad?
Asbestos gaskets are prohibited from use
It isn’t completely prohibited; it is a material that is not recommended and belongs to the category of materials to be phased out
Regarding the question raised by the poster, I still recommend that you refer to the specifications, 20592
1) Use polyethylenepropylene rubber in the presence of water or at temperatures above 80°； 2) Use metal gaskets in conditions of oil, corrosion, and high temperatures ； 3) Use asbestos gaskets in conditions where sound and static insulation are required.
Asbestos gaskets have been banned! Currently, non-asbestos rubber gaskets or polytetrafluoroethylene gaskets are used; the selection of such gaskets can be determined according to standard HG Department Flange Gasket Fasteners 2059X, which specifies the temperature and pressure ranges for various types of gaskets
Asbestos gaskets are not allowed to be used. Concerning the health of those in contact
Metal gaskets are generally used under high pressure, right?
Aspirin gaskets can be used for non-standard applications or temporary use
Could you tell me what kind of pad replaces the asbestos pad? For regular methanol-propane pipelines, should a PTFE gasket be used?
The use of gaskets depends not only on the properties of the medium and temperature, but also on the type of flange being used. GB/T 4622.1—2003 Classification of wound gaskets GB/T 4622.2—2003 Dimensions of wound gaskets for pipe flanges GB/T 4622.3—1993 Technical requirements for wound gaskets GB/T 9126—2003 Dimensions of non-metallic flat gaskets for pipe flanges GB/T 9128—2003 Dimensions of metal ring gaskets for steel pipe flanges GB/T 9129—2003 Technical requirements for non-metallic flat gaskets for pipe flanges