|HDPE Pipes Properties
Due to the thermoplastic material the pipes can be welded together which
signifies, that the whole pipeline builds a homogenous system and is absolutely
safe against infiltrations and exfiltrations.
Good chemical resistance
Spicialy against biogenous sulphuric acid corrosion plays a key role regarding
the longevity of the system.
Even at low temperatures, ensures a robust pipe, resistant against impacts
during transport, installation on the site and during the whole service life
Polyethylene and polypropylene can be recycled to 100%. without the structure
of the material having to be modified dramatically.
Resistant to microorganisms, rodents and termites
Because of the smooth round surface of plastic pipes Polyethylene and
polypropylene are not a nutrient medium for bacteria, fungi and spores, so that
the material is resistant to all forms of microbial attack as well as to both
sulphurous acid and sulfates.
Inner diameter and hydraulic properties of KRAH MISR
pipes will remain constant regardless of the wall thickness or the
profiles due to the smooth anti adhesive inner pipe surface. Compared to other
pipe materials like concrete, smaller diameters can be used, which means that
costs for material and installation can be reduced considerably.
Polyethylene and polypropylene pipes are among the most abrasion proof
pipes.This has been tested in the so-called Darmstadt procedure and the results
are shown in the below diagram and confirm the quality of polyethylene
Black polyethylene pipes are permanently resistant to atmospheric corrosion and
UV radiation. Thus the pipes can be used and stored outside without the pipe
material being damaged. No aging effect will occur.
Elastic pipes can react to changes in their environment. Due to the deformation
performance, the load is distributed to its surrounding and the force acting on
the pipe will be diminished. Within a short time there is a balance in the area
around the pipeline and the deformation comes to a standstill. profiled pipe
can fix the pipes in the soil. There will be no or very few axial extensions in
the pipeline. KRAH MISR pipes are nearly
unaffected by temperature variations.
Pipes made of Polyethylene and Polypropylene have considerable advantages to
other pipe materials like concrete, steel, ductile etc. Due to their material
the KRAH MISR pipes posses over a high elongation
at break. This signifies, that the pipe can support even loads or
deformations,that were not included in the actual calculation and design of the
pipe, like for examples earthquakes. The KRAH MISR
Pipes deform conform with the movement of the earth without any breaks
or cracks, so that the activity of the pipeline is not drastically affected. As
soon as the overload and earth movement ends, the pipe with go back to its
intial condition and position.
Deflection is safety
Many years of practical experience have shown that flexible pipes (b) can
resist traffic elude a selection strain and other loads more effective than
flexural resistant pipes (a) made of concrete or other rigid material.