:: Cosmoplast ::

PROPERTIES	UNIT	VALUE
Specific gravity	gms/cm³	1.41 + 0.02
Specific heat	Kcal/kg/⁰C	0.25
Co-efficient of linear expansion	mm/m/⁰C	0.08
Vicat softening temperature	⁰C	85 @ 1kg load
Elongation at Break	%	90 min
Tensile strength @ 20⁰Cmin	Mpa	50
Compressive strength	N/mm²	-
Water absorption	Mg/cm²	<4
Modulus of Elasticity	Mpa	1200-1500
Flexural Strength	Kg/cm²	950
Impact Strength	Joules	4.75 - 5.42
Impact Strength	mg/cm2	<4
Thermal Conductivity	K/Cal/cm.ho⁰c	0.13
Volume Resitivity	OHM/cm	1014
Dielectric Strength	KS/mm	>740
Friction Coefficient	-	135-150
Flammablity	-	Will not support combusion

uPVC MATERIAL PROPERTIES

COSMOPLAST manufactures uPVC pipes and fittings for various applications covering drainage, sewerage and pressure applications. The following table shows the main properties of the upvc material.

uPVC is extremely well adapted to withstand abuse aganist both natural as well as man-made elements, which may cause damage to the material. Resiatance to corrosion: uPVC being a non-conductor is tatally immune to all types of galvanic as well as electro-chemical influence which might corrode it. Being non-metallic, it is also impervious to any type of corrosion caused by water as well as a large range of industrial iquids and chemicals. Seepage from high sulphate soil, as well as low hardness waters also do not threaten it. This in turn ttransalates into a longer installed life of the uPVC pipe system.

Refrence should be made to CP 312 part 1:1973 for a full list of chemical agents and the rsistance of uPVC to them. For further information, please contact our Technical Department.

uPVC is completely immune to any microscopic life that it might be exposed to. It does not offer a food source to any bacterial life form and is completely guaranteed to withstand any such growth. Certain elastomer seals may sometimes disintegrate when exposed to certain micro-organisms.

Therefore, the water industry has specified that only those elastomer materials, which can withstand biological growths, are to be installed in pipeline systems. both the seal as well as lubricants recommended for use with Cosmoplast pipes have been tested and proven to be immune from damage due to bacterial growth.

Resistance To Weathering

Long and high temperature exposure to sunlight, especially in the Middle Eas t where the surface temperature of pipes may rice significantly above the ambient temperature of pipes may rice significantly above the tensile strength of uPVC pipes. Due to certain ulltra violet radiation, the pipe surface can discolor and craze over. This degradation causes a marked reduction in the impact resistance of the pipes in addition to color changes.

Solar gain i.e the heat the pipes absorb when exposed to direct sunlight, may also cause permanent damage to pipes and fittings and therefore, proper precautions must be taken while storing them as detailed previously in this brouchure.

Resistance To Abrasion And Tuberculation

Abrasions on uPVC pipes whether due to stress from abrasive fluids or excessive pressure are never localized and cause erosion over a large area.
Generalizations would not be appropriate due to the large types of abrasions possible. Tests have however shown that uPVC pipes are up to 2.5 times more resistant to abrasions when compared to mild steel.

uPVC pipes are totally immune to tuber collation caused by soluble encrustants such as calcium carbonate, as it does not offer a firm base to any precipitate.

Soil And Traffic Loads

If the pipeline system is under constant use, the pressure within the pipes are enough to offset any external pressure. In cases where the pipes are expected to stand empty for long periods of time, it may be prudent to assess the external pressure and the precautions that are required to offset them.