Since time immemorial, people have recognized amazing fibrous material that ignores fire. Its name is asbestos (Greek asbestos - indestructible, unquenchable). Asbestos cord has become one of the most sought-after products from this mineral. The certificate of modern products complies with ISO 9001: 2008. They are actively used in industry, housing and communal services, when laying heating systems.
Asbestos fibers, similar to silk yarn, are twisted into bundles, diluted with cotton or viscose. Product shape, size, weaving methods and mineral content vary. The design of the cord also has differences: with and without a core. The field of operation of these products may be environments such as steam, gas or water. The most common cord is asbestos SHAON (GOST1779-73). Next, we will talk about the varieties of products.
General Purpose Asbestos Cords
The composition of the products includes chrysotile asbestos fibers with impurities of cotton and other chemical fibers. It is used as a sealant and thermal insulation of various compounds in thermal units. Asbestos cords of this type have good resistance to vibration, should not have any breaks or bundles of threads, and also be resistant to bending.
Asbestos down cords
Asbestos threads, combed and woven with synthetic or cotton, represent the core of this cord. Outside, it is braided with asbestos yarn. ShAPs are used in thermal insulation of multiple thermal units and heat conduction systems with a maximum temperature of 400 ° Celsius at a working pressure of 0.1 MPa.
Asbestos gas generator cords
The core of this cord is made up of asbestos-free SHAON-type cords braided by a metal wire. Use it in environments with gases to seal manholes and gas generators. The maximum operating temperature is within 400 ° C at a maximum pressure of 0.15 MPa.
Asbestos sealing cords
As the core of this cord use several times folded asbestos cords of the ShAP type with external braiding with asbestos filaments. Its operating parameters correspond to other types. The main difference is the maximum cord size. He found the main application in sealing door frames, machine parts, as well as armor coke ovens.
Cords are heat-resistant, asbestos-containing
For the production of this cord use asbestos fiber with some admixture of cotton. The outer braid is made of glass thread with the addition of cotton fibers. It has been widely used in enveloping insulation, as well as in the field of thermal insulation of hot surfaces, pipelines. Permissible hygroscopicity - 4%.
Asbestos is a material that is considered one of the most dangerous carcinogens. The fact is that its microscopic fibers are not excreted from the body. They easily exfoliate and create an aerosol suspension in the air. People who constantly come into contact with this material and do not follow safety precautions may eventually develop asbestosis or pulmonary fibrosis. The most dangerous products are amphibole asbestos. However, asbestos cords, which are made of chrysolite material, are safe for health.