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Asbestos rubber sheets can be divided into three models: XB450, XB350 and XB200 due to different ingredients, processes, properties and uses. They are customarily called high-pressure asbestos rubber sheets, medium-pressure asbestos rubber sheets and low-pressure asbestos rubber sheets. XB450 rubber sheet can be used to seal high temperature and high pressure water saturated steam, superheated steam, air, gas and other inert gases, and can be used to seal gasoline, kerosene, lubricating oil and alcohol under normal temperature and pressure; XB350 asbestos sheet can be used for temperature Sealing water pipes and steam pipes at 350℃ and pressure below 4MPa; XB200 asbestos rubber sheet can be used to seal general plumbing equipment and low-pressure water pipes and steam pipes. XB450, XB350, XB200 asbestos rubber sheets are generally not more than 3mm thick, and asbestos sheets exceeding 3mm are allowed to be laminated. Asbestos rubber sheets with a thickness of 1.5mm and below are packaged in rolls, and those with a thickness of 1.5mm and above are packaged flat.