This standard specifies the classification, technical requirements, test methods, inspection rules and marks, Encasement, transportation and storage of asbestos Cardboard. Applicable to asbestos Cardboard as a lining material for thermal insulation, thermal insulation and encapsulated sealing gaskets below 500 ° C. A series of standards are cited, including standards on test methods for oil-resistant asbestos rubber sheets, classification systems and test methods for Non-metallic gasket materials, density test methods for sealing gasket materials, asbestos latex copying boards, etc. The asbestos Cardboard is defined as a cardboard-like material made of medium and short asbestos fiber as the main raw material, adding filler and binder, through beating, copying, drying and other processes. According to the use, it is divided into two categories: heat insulation, thermal insulation and sealing gasket lining materials.