tuberías de polietileno

The diameter of the polyethylene (PE) pipes can be very different. Due to the characteristics of this thermoplastic and flexible material and of a great thermal insulation there are cases in which the increase of the volume of the liquid that is transported in these pipes due to the frosts increases their diameter. In any case, that dilatation doesn’t produce a breaking, and with the following melting they recover their original shape and the diameter.

According to the type of the pipe and the type of the polyethylene, we talk of one or another diameter. We distinguish them among their food and agricultural uses, and for gas conductions, and from there, we differentiate them among different measures.

PE pipes apt for the food use

a) PE pipes high density PE100. They have great resistance to the spread of cracks. For the diameter up to 90 millimetres (mm) they are provided in great lengths.

In any places, you should explain when you talk about atmospheres you are referring to the NP (Nominal Pressure) which supports a pipe, although in Europe it is talked about the SDR. Attach the chart of equivalencies between PN and SDR that I attach to you.

Gráfico I

b) The PE 40 pipes of low density. They are used for water connections; they can be also used for irrigation. They are flexible and with high resistance, they are an excellent electrical insulator.

Gráfico II

PE pipe for agricultural use

In this case, the diameters are between the 20 and 90 mm, and they are available in 4.6 and 10 atmospheres.

Gráfico III

PE pipes for gas conductions

It is commonly used in the transportation and distribution of gaseous fuels in the buried pipelines, but also for irrigation, water supply networks or restoration of pipes.

a) PE100 of high density. They are yellow or orange, and for a pressure of SDR 11 are supplied with diameters of 110, 160 and 200 millimetres.

 b) PE80 of high density. Its colour is always yellow. For a pressure SDR 11 is presented in diameters of 20, 32, 40, 63, 75, 90, 110, 125, 160, 180, 200, 250 and 315 millimetres. For SDR of 17.6, the diameters are of 63, 75, 90, 110, 125, 160, 180, 200, 250 and 315.

In the previous charts it is talked about atmospheres in reference to the nominal pressure (NP) which supports a pipe. In Europe it is used the relation of standard dimensions (SDR). The following is a chart of equivalencies between both terms:

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