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› › Production of polyethylene pipes

Production of polyethylene pipes

In the production of polyethylene pipes, low-pressure polyethylene (HDPE) is most often used, namely from polyethylene classes PE 63, PE 80, PE 100 and PE 100+ [1] with a standard dimensional ratio SDR 41 – SDR 6, nominal diameters from 16 to 110 mm for main operating pressures 4; 6; 8; 10 bar. In most cases, PE polyethylene pipes have a uniform black color and a diameter of 20 to 1200 mm. All such products are produced in several possible versions: products of small diameter are bundled into packages in the form of segments, and pipes of large diameter are produced in the form of coils, the length of products is from 100 to 2000 meters. The color of the pipes is black with blue marking stripes.

PND pressure polyethylene pipes are produced with established dimensional ratios as SDR41-SDR6. The range of diameters for the HDPE pressure pipe is set from 16 mm. up to 1200 mm. And the main working pressure is provided from 0.4 to 2 MPa. The HDPE pressure pipe can be produced both in a straight length from 6 to 12 meters, and in coils or bays. As a rule, coils and coils are used for HDPE pipes with a diameter of up to 110 mm.

Non-pressure HDPE polyethylene pipes are made of polyethylene grades PE63 and PE80. Ring stiffness of these pipes: SN4, SN8, SN16. PE sewer pipes are produced in standard lengths from 6 to 12 m, if this is not agreed with the customer.

Polyethylene pipes have excellent technical and economic performance directly related to low operating costs, low installation costs and long service life, as well as the possibility of recycling the spent pipeline.

Pipes belong to the 4th hazard class according to GOST 12.1.007. They do not emit toxic substances into the environment and do not have a harmful effect on the human body upon direct contact. They are non-toxic and explosion-proof. Working with them does not require special personal protective equipment.

 

Production of polyethylene pipes Summarizing, we can distinguish the following advantages of PE pipes over steel and cast iron:

  • The production of polyethylene pipes is much cheaper than the cost of metal pipes;
  • guaranteed service life – 50 years;
  • polyethylene pipes have low thermal conductivity, which reduces heat losses and reduces the formation of condensate on the outer surface;
  • thanks to PE pipes, the probability of pipeline destruction when the liquid freezes is reduced, since in this case the pipe does not collapse, but increases in diameter, acquiring the same size when the liquid thaws;
  • polyethylene pipes have high corrosion and chemical resistance, are not afraid of interaction with aggressive environments;
  • welds and connections are reliable throughout the entire service life;
    butt welding is much easier, cheaper and less time consuming;
  • they are a reliable shield against microorganisms and bacteria, their inner layer does not give off any harmful impurities to the water;
  • PE pipes are several times lighter than steel pipes, so they facilitate installation work, especially in cramped conditions and do not require lifting equipment when moving.