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Asbestos gaskets can be divided into low-pressure asbestos rubber gaskets, medium-pressure asbestos rubber gaskets, and high-pressure asbestos rubber gaskets according to the temperature and pressure used. Suitable for sealing water, steam, oil, solvent, medium acid, alkali, and asbestos gasket is mainly used in the sealing of medium and low-pressure flange connections. Products are used in the chemical industry (medicine, pesticides, fertilizers, dyes, polymers, intermediates, etc.) petroleum, electronics, machinery, electric power, environmental protection, and many other fields.
Gaskets cut from asbestos sheet packaging are used in various factories, refineries, and power plants. Engineers believe that asbestos mixed with fibrous filler is the ideal material for sealing any mechanical system that involves the transport of hot gases, oil, steam, acids, or other chemicals. Asbestos gaskets are used in engines and heavy industry to make tight seals between pipes or machine parts. Components that are sealed with asbestos gaskets include pipes, pumps, compressors, valves, boilers, engine cylinder heads, heat exchangers, and condensers.
When removing old asbestos gaskets and sheet packing from pipes and machinery, abatement workers must follow the following points: gaskets should be removed intact whenever possible. Gaskets that are deteriorated need to be removed within a glove bag. Gaskets must be immediately placed in a disposal container. All scraping needs to be performed wet. In addition to adhering to the requirements mentioned above, it is important that any worker handling asbestos wear the appropriate protective gear. Workers should wear an air-purifying half-mask respirator and adequate work suit. Once work is completed, work suits must be vacuumed with a HEPA vacuum, and the employee should shower in a designated decontamination area.
As public awareness of asbestos-related diseases broadened in the 1970s and 1980s, American manufacturers gradually phased out the use of asbestos in gasket products.
In July 1989, the U.S. Environmental Protection Agency (EPA) prohibited the manufacture, importation, processing, and distribution in commerce of most asbestos gaskets by 1994. EPA's decision to ban asbestos gaskets was based solely on exposure data obtained from the gasket manufacturers.
Many Americans mistakenly believe that asbestos was banned decades ago. Tragically, that is not the case. Although asbestos is no longer mined in the U.S. and its use has declined significantly, American industry still legally imports, uses and sells both raw asbestos and products made with it.
if the material containing asbestos is damaged, it can release fine dust that contains asbestos fibers. When the dust is breathed in, the asbestos fibers enter the lungs and can gradually damage them over time.
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