Alternatives to asbestos after its ban
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Hello everyone. Since the use of asbestos pads was discontinued, I find it very inconvenient to create custom-shaped gaskets and special-type pads; this is especially true in environments with high temperatures and pressure, as graphite sheets tend to become brittle. Have you come across any convenient and practical solutions during your maintenance work? It is best to specify the grade of the modified tetrafluoro compound or the name of the adhesive. In the northern hemisphere, leaks in steam-related systems are particularly common in winter. . . . . .
I also hope to see useful information and methods
There is a type of soft PTFE, 8-9 mm thick; please specify the width for purchase.
Asbestos is gradually being phased out of use in sealing materials both domestically and internationally, but its properties as a sealant are still quite good; it’s only avoided due to health and environmental concerns. If substitution is considered, there are many materials that can be used as alternatives. As non-metallic materials, graphite, tetrafluoro compounds, various synthetic fibers, mica, and ceramics can all serve as substitutes. However, these materials lack the comprehensive sealing properties of asbestos, and they can only serve as substitutes in certain aspects. Therefore, the material should be selected based on the actual sealing application conditions
Polytetrafluoroethylene and neoprene have been used as substitutes
Non-asbestos rubber sheets are often used for pipeline pressure testing on site; polytetrafluoroethylene sheets have also been used. It depends on the price and suitability for use – since the client has no budget concerns, it is recommended to use proper gaskets for all high-pressure sections
Perfluoroethylene won’t work; its temperature resistance is poor. What you’re referring to is probably something like expanded perfluoroethylene, young man