From time immemorial, man has known an amazing fibrous material that ignores fire. Its name is asbestos (Greek asbestos - indestructible, inextinguishable). Asbestos cord has become one of the most popular products from this mineral. The Modern Products Certificate complies with the ISO 9001:2008 standard. They are actively used in industry, housing and communal services, when laying heating networks.
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 scope of operation of these products can be media such as steam, gas or water. The most common is the asbestos cord SHAON (GOST 1779-73). Next, we will talk about the varieties of products.
Asbestos cords for general use
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 nothave any breaks or bundles of threads, as well as be resistant to bending.
Asbestos downy cords
Asbestos threads, carded and woven with synthetic or cotton threads, represent the core of this cord. Outside, it is braided with asbestos yarn. ShAPs are used in the thermal insulation of multiple thermal units and heat pipeline systems with a maximum temperature of 400˚ Celsius at an operating pressure of 0.1 MPa.
Asbestos gas generator cords
The core of this cord is made up of asbestos cords of the SHAON type folded together, braided with metal wire. It is used in environments with the presence of gases for sealing hatches 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, asbestos cords of the ShAP type folded several times with an external braiding of asbestos threads are used. Its operating parameters correspond to other types. The main difference is the maximum cord dimensions. It found its main application in the sealing of door frames, machine parts, as well as the armor of coke ovens.
Heat-resistant cords containing asbestos
For the production of this cord, asbestos fiber is used with some admixture of cotton. The outer braid is made with glass thread with the addition of cotton fibers. Widely used in enveloping insulation, as well as in the fieldthermal insulation of hot surfaces, pipelines. Permissible hygroscopicity - 4%.
Asbestos is one of the most dangerous carcinogens. The fact is that its microscopic fibers are not excreted from the body. They easily delaminate and create an aerosol suspension in the air. People who constantly come into contact with this material and do not follow safety precautions may develop asbestosis or pulmonary fibrosis over time. The most dangerous are products made from amphibole asbestos. However, asbestos cords, which are made of chrysolite material, are safe for he alth.
