To date, not a single construction of pipelines is complete without the use of modern technologies. Every year, scientists come up with all new materials that replace old in view of their low efficiency. Such materials include low -pressure polyethylene, from which special pipes used in gas supply and water supply are made. The main advantages of polyethylene pipes are:
1) the possibility of laying underground.2) ease of installation, when compared with iron pipes. The fact is that these pipes use testless technologies, moreover, they weigh little.3) do not pollute drinking water, since their inner layer does not emit harmful impurities.4) are cheaper than iron pipes.5) service life for more than fifty years.6) have high chemical and corrosive stability.7) have low thermal conductivity.
PND pipes are a new variety of polyethylene pipes, which are also produced from low -pressure polyethylene, but already using the method of constant screw extrusion. The creation of these pipes made cardinal changes to the construction of pipelines. According to the latest data in many countries, more than 80 percent of water and gas pipeline systems are made of PND pipes, as they have several advantages in relation to ordinary steel pipes:
1) have high strength.2) an excellent ratio of quality/price indicators.3) Small weight.4) easy to transport and mount.
Now you can buy PNP pipes in almost any large city. It is worth noting that in specialized stores, such important building materials as fixtors of reinforcement and hook for knitting reinforcement are also sold.