07. Installation

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Break pressure manholes and calculation of the pump unit power

  • Break pressure manholes In some installations with a steep and long slope in which water goes down from a deposit, spring, etc. it is necessary to break the growing pressure which is produced in the parte inferior of the pipe with the aim of not having excessive pressure in the case that the pipe transfers the load or suffers some obstruction. […]

Characteristics of the trench for buried plastic pipes

Realization of the trench It will be excavated up to the line of the soil provided that the soil is uniform; if the rigid elements are not covered such as stones, rocks, old bricks, etc., it will be necessary to excavate below the soil to perform the following filling. […]


The pipes of the supply network, are normally buried in the subsoil of the towns, under pavements, asphalt, paving stones, etc., covered with filling ground, gravel, graded-aggregate or buried and protected with concrete at junctions of streets or points where they can suffer high loads. It is not common that the pipes run visibly on the surface or on the interior side of visited galleries, conditions under which it would be simple to find the exact point of the damage and [...]

Conditions for the installation of plastic drainage pipes

Conditions for the installation The plastic drainage pipes allow a quick and simple installation due to their lightness and flexibility. The supply in rolls and the bars of 6 m facilitate the handle and installation. […]

Plastics piping Systems in Polyethylene (PE) for the supply of gaseous fuels

In the 60s of XX century, plastic pipes had begun to be introduced in some areas of Catalonia and Andalusia using rigid PVC pipes. At that time natural gas was still not and gas distributed (“city” gas or “manufactured”) it was locally manufactured from petroleum and in some cases still from coal. […]

Jointing of large bore pipes. Electrofusion Couplers and Branch Saddles

In the AMI seminar, FRIATEC (www.friatec.com) introduced a new generation of electrofusion fittings Frialen –XL for PE pipe joining large diameter up to 1200mm which solves the Ovality problem and outer diameter Tolerances, that are important in these dimensions, through flexible electrofusion couplers. […]

Calculus of impulsions, aspiration and dimensioning of plastic pipes

• Impulsions When it is necessary to lift the water to a deposit placed in a higher level Hg (geometric height) and it is different from the one which takes the water, it is necessary to use pumps (A) which make is flow through the pipe which will work under pressure. […]

Introduction to hydraulic pressure plastic pipe calculations

Static pressure and piezometric In the previous picture it has been represented a deposit E with its corresponding AB pipes which has a valve in its lower end B. The line EF is the load platform or STATIC CHARGE LINE and we will see the following 3 cases: […]

More about Aquaculture, Fish Farms and Marine Farms with PE pipes

STRUCTURES USED IN SHELTERED AREAS The first farms in the sea (or “off the land”) were installed in sheltered areas (fiords, coves, lakes), safe from the hard conditions which prevail in open sea. […]

Aquaculture, Fish farms and Marine Farms with PE pipes

Aquaculture is the farming of fish, molluscs, crustaceans and algae in “more or less controlled” conditions. It constitutes one of the few industrial activities developed by the man who is integrated in the environment from the higher and most exquisite of respects helping, not in only few occasions, to its regeneration. […]