Polyethylene pipes for waterworks, natural gas pipeline, civil and industrial drainage

Deriplast polyethylene pipes are made according to in force norms using raw materials approved by the certification authorities of involved countries. Used polymers are high density polyethylene PE 80 and PE 100. Deriplast product range goes from 20 mm up to 1200 mm diameter with nominal pressure from 3.2 bars to 25 bars.

Polyethylene is an extremely valid alternative to pipes made with traditional materials like cast iron, steel, concrete, etc. both for technical and economical reasons. Polyethylene pipes remarkable development and broad diffusion of are due to the particular material features.

Abrasion

Polyethylene is more resistant to superficial abrasion than steel and concrete; that feature makes it suitable for solid matter transportation in water (mud) and for sand and gravel dredging operations. During deployment the pipe external surface should not be scratched or carved by sharpen objects; It is so appropriate to handle conduits with care to avoid carvings on the surface, which may reduce the pipe mechanical specifications.

Flexibility

Polyethylene highly flexibility and its ability to recover the original shape after deformations make it suitable to absorb vibrations, knocks and stresses due to soil movement, making it ideal for unstable areas installation.

Lightness

Polyethylene conduits have a low specific weight, making it easy to transport and install, allowing a considerable cost reduction.

Corrosion

Polyethylene is chemically inert at normal use temperatures; for this reason it doesn't crack, corrodes or reduces its thickness after electrochemical reactions with the surrounding terrain. It doesn't favor weeds, bacteria or fungi growth.

Low temperatures

Polyethylene mechanical specifications allow conduits to work even at very low temperatures of about -60°C.

Chemical effects

Polyethylene has good resistance to a broad range of chemical substances; in the long run, the contact with highly oxidative chemical agents, like strong acid, may cause degradation. Pipe-cleaning could favor the propagations of cracks especially at high temperatures; some solvents (hydrocarbon like petroleum and oil) could be absorbed reducing mechanical resistance and giving taste problems on the trasported fluid.

Thermal stability

Exposing Polyethylene to normal environmental variations don't cause its degradation; during conduits production, the material is subjected to temperatures up to 200°C - 240°C; to avoid chemical-physical deterioration appropriate stabilizers are added.

UV rays resistance

To avoid polyehtylene deterioration (obsolescence) due to ultraviolet rays exposition, black carbon is added, a stabilizer that allows long term outside pipe' storage.

Electrical and thermal conduction

Polyethylene has low thermal conduction but it is flammable, making not possible to use blowtorches to thaw conduits or for any other specific operation. Conduits must be protected in case of near heat sources which could increase surface temperature over 60°C. Polyethylene is also a poor electricity conductor and so there isn't specific solutions need in conduits network realization.

Nontoxic

Polyethylene is a completely nontoxic material, making it suitable for drinkable and to be drinkable water transportation. It complies in fact with the decree n° 174 del 6/4/2004 of Ministero della Salute.