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167a

Background

From 1993 to 2004, when it was enacted the European normative EN 12201:2003, the PE 80 and PE 100 pipes were manufactured with some TECHNICAL SPECIFICATIONS whose content was exactly equal to the project of European normative prEN 12201. The Certification of AENOR in basis of the corresponding PARTICULAR REGULATION RP01.35 for PE 100 pipes and RP01.41 fr the PE 80 pipes, gives place to a CERTIFICATE OF CONFORMITY, whose nº was marked in the pipe and identified the manufacturer. Since 2003 these pipes have been manufactured with the Brand “N” of AENOR. These pipes were designed with a safety coefficient C = 1.25, in fact the compound PE 100 which was born at the beginning of the 1990 and was used to manufacture PE 100 pipes with a coefficient C = 1.25.Leer más

158a

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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The transformation of the plastic materials by extrusion (pipes) or by injection (fittings) allow us working with very tight manufacturing tolerances that make it easy the tightness of the different elements of plastic material which are part of a water network (sewer, supply, etc.). Such small tolerances can’t be got with other kinds of materials, for example of cast concrete.Leer más

140a
. . . continuation of the previous post.

In which applications can have higher use the No-Dig Technologies?

The first thing to take into account is that during the last 50 years it has been developed in the city countless of canalizations, collectors and drainages. Formerly we were used to see how it was installed on the surface the poles of telephone lines, the electrical wires, the high voltage towers, etc., while now the tendency is to bury all these kinds of installations. Many high voltage lines are already underground; the cities have networks which are wider and wider of optic fibre that go underground . . .Leer más