What is asbestos? What is the standard?
Asbestos, hence the name "thought", is something made of stone that resembles cotton
Asbestos is not resistant to high temperatures. Asbestos fibers begin to be pulverized at more than 500 degrees, so asbestos is used only as insulation material.Direct contact with flames in the laboratory as an asbestos net does not indicate that asbestos can accept the flame. Alcohol lamp flame is weak, and asbestos net barbed wire heating cooling, the temperature of asbestos network. That is, the surface reached this temperature, it has caused asbestos powder, gradually damaged.If the alcohol burner burning with asbestos, or placed in a muffle furnace, may be destroyed once.
The standard system of chrysotile asbestos in China has been established on the basis of reference to the standards of the advanced countries in the world and the actual conditions of china. It not only specifies detailed inspection methods and determination methods, but also specifies detailed inspection equipment parameters.In 1961, Chinese promulgated the industry to build non metal ore Research Institute for reference by Soviet standards asbestos industry standard, building standard 54-61 "chrysotile" standard.In 1987, China formulated GB8071-1987, chrysotile asbestos, GB6646-1986, chrysotile asbestos inspection methods and other standards.In 1998, the national standard of GB8071-1987 asbestos was revised by the Xianyang Institute of non-metallic mineral research and design. Increase the definitions of revision, modify the product code, cancel the product classification, will reflect the degree of fiber loosening the specific surface area of the project to release the project determination, will be divided into test type testing and factory inspection, increase the operability of standard test, save time and cost, the provisions of the rules of inspection, strict inspection, the risk of reasonable allocation, the formation of a more advanced and perfect the standard system of asbestos.
Asbestos, also known as asbestos, is a commercial term for silicate mineral products with high tensile strength, high flexibility, chemical and thermal resistance, electrical insulation, and spinnability. It is a general term for natural fibrous silicate minerals. Under the jurisdiction of the 2 class a total of 6 kinds of minerals (with serpentine asbestos, amphibole asbestos, asbestos, actinolite anthophyllite tremolite asbestos asbestos, iron, etc.). Asbestos consists of a fiber bundle, consisting of very long, very thin fibers that can be separated from each other. Asbestos is of high fire resistance, electrical insulation and thermal insulation. It is an important fireproof, insulating and heat insulating material. However, because asbestos fibers can cause asbestos, pleural mesothelioma and other diseases, many countries have chosen to ban the use of such dangerous substances.
