Asbestos — it is a thin fibrous mineral of the silicate class. In its natural form, it consists of thin and flexible fibers that are very resistant to tearing. It is used in construction, automotive industry and even in rocketry. Asbestos concrete pipes. Combining it with cement gives a material that has many useful properties. In particular, it is from this material that asbestos pipes are made. At the same time, the products can be given a variety of shapes. From simple slabs and slate to different types of pipes. Asbestos pipes are manufactured by industrial plants, equipped with lines and for the production of couplings. The large inner diameter of the coupling and the smaller outer diameter of the pipe allow tight joining of asbestos pipes. Depending on the application, the cross-section of the pipes varies from 10 cm to 1 meter. Asbestos-cement pipes are divided into two types - pressure and non-pressure. Pressure asbestos-cement pipes must comply with the parameters of GOST 539-80, and are designed to withstand pressure up to 9 atmospheres.