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Background

The Subcommittee of normalization of AENOR SC2 “Plastic pipes and fittings” whose Secretary’s office is masterfully run by Mª Carmen del Amo of ANAIP, which depends on the Technical Committee of Normalization CTN 53 “Plastics and Rubber” of AENOR, whose Secretary’s office runs the entities ANAIP and COFACO.Leer más

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The geothermic conditioning is a much more efficient system of conditioning than the conventional systems that, besides, are classified as renewable energy. This technology is widely developed in many countries of the European Union, United States and Canada. The market of the shallow geothermic energy or of low enthalpy (whose direct product is heating, cooling and/or sanitary hot water) started its development in Spain around the year 2004.Leer más

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Geothermic Energy

The geothermic energy is the utilization of energy stored in the way of heat under the solid surface of the Earth. From the Greek “geos” = earth and “thermos” = heat.

Some 4.500 millions of years ago, the Earth was an immense burning ball made essentially of gases and dust. When that nebula cooled and consolidated, some 3.800 millions of years ago, a hard crust was formed which caught inside a huge quantity of heat, which nowadays still persists making the planet an enormous natural boiler.Leer más

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At the beginning of 2015 some people were interested in knowing solutions to join together different types of pipes or other elements like chambers, manholes, etc., what has motivated me to write this article about Transitions.

• Pressure

In the case of the PE pipes under pressure, the transition in small diameters, maybe up to 110 mm can be done with the thread of the mechanical fittings, for example, the union male thread or female thread, the same in some electrofusion mix fittings with metal thread. In higher diameters it is the PE flange adaptors which allows connecting through a loose flange to any other element with flange, like it can be a valve, fitting or metal pipe.

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In a similar way, we can also connect the PP pipes PP with PP flange adaptors and loose flanges and PVC-U pipes.

In the gas networks done with PE pipes, there are also BRANCHES that do the transition of PE pipes to steel or copper pipes.

In the post SOME METHODS OF REPARATIN OF PLASTIC PIPES it can be seen universal fittings that also can be used as transition of a plastic pipe to another type of metal pipe or of fibrocement. In the case of the PE it is required that these fittings be resistance to the tensile.

• Sewerage

Although most of the times the transition of a concrete pipe to a plastic sanitation pipe without pressure is done through brick chambers built in situ or prefabricated of concrete, it must be taken into account that there is a range of plastic transitions that can solve that problem as we can see here:

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There is no doubt that the progress of the Spanish market at the beginning of the 21st century of the multinationals of plastic pipes, like Wavin, Uponor, Pipelife, etc. has deprived us of having these solutions available close to us but as nowadays the market is global they can be obtained in their manufacturing sites with relative quickness.

My experience tells me that the sanitation in the Nordic countries is more exigent and it is more developed than the networks of plastic systems of pipes and fittings, with the aim of getting tightness in all the joins, a thing that is checked through the proper tightness tests.

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In our Spanish country, most of the times, the join of a plastic branch with a concrete collector is done by making a drill hole in the concrete and connecting the plastic branch with a cement seal, instead of making it with rubber seals.

>>> If we want to get the tightness in the sewerage networks, we should develop and have complete plastic systems that include the pipes, fittings, chambers, manholes and transitions to other elements.

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• Excavation of the ditch

The dimensions of the excavation vary in function of the characteristics of the soils and they should be large enough to guarantee its stability. The whole excavated material should be removed from the surroundings of the excavation, to make sure that they don’t pollute the filling material.Leer más