Asbestos-cement non-pressure pipe d.300, 5 m

Non-pressure asbestos pipes

Non-pressure pipes are used in conditions where the transported media do not exert high pressure on the pipeline: in ventilation systems and pipelines, drainage and storm systems, gravity sewerage, in the construction of water wells or installation of columnar foundations (with a diameter of more than 150 mm).

Non-pressure asbestos-cement pipes must withstand an internal pressure of up to 6 atmospheres (0.6 MPa).

In addition, they weigh less than steel ones, which simplifies installation and delivery. They do not require additional insulation.

Connections are made using asbestos-cement couplings or shaped fittings made of metal or plastic. Gaps between products are filled with sealants or tow.

The advantages of asbestos-cement pipes include:

• resistance to moisture and anti-corrosion properties (they can be laid directly in the ground without additional protection even in high-humidity conditions);
• resistance to stray currents (in underground pipelines), since the material is a dielectric;
• the lowest coefficient of linear expansion compared to all other materials from which they are made;
• fire resistance (asbestos cement does not burn, and melting begins at temperatures above 1500 °C);
• the material also withstands the low temperatures typical of the northern climate;
• the heat loss coefficient is lower than that of metal products;
• the inner walls of the product have an absolutely smooth surface, which eliminates the risk of the pipe “clogging up” and also reduces the resistance of the moving media;
• asbestos-cement pipes are very easy to install and do not require special equipment;
• the resistance of asbestos cement to external influences and its chemical inertness ensure a long service life;
• the cost of asbestos-cement products is lower than that of metal ones.

The disadvantages of asbestos cement include the rather large weight of the structures, as well as weak resistance to mechanical impact damage (it can break from external force).