Material Characteristics


Material Characteristics


uPVC is approximately half the weight of copper pipes, one-fifth of the weight of steel pipes & one-tenth the weight of cast iron pipes. Transport and handling is therefore both simple and convenient.

Chemical Resistant

The excellent chemical resistance of uPVC to acids, alkalis, oxidizing and reducing agents makes it particularly suitable for a wide range of industrial application. Generally uPVC is resistant to most oils, fats, alcohols and aromatic-free petrol, but is unsuitable for use with aromatic and chlorinated hydrocarbons, ketones, esters & cyclic ethers which lead to marked swelling and softening of the material.

High Flow Rate

The internal surface of uPVC pipe fittings is “extremely smooth” equivalent to manning and kutter coefficient of 0.0010, giving excellent flow properties which remain constant due to reduced build-up of scale.


uPVC does not support combustion


uPVC is non-conductor of electricity & is therefore not subject to galvanic or electrolytic action.

Weather Resistance

The Rajhi Pipes range is manufactured from a specially formulated uPVC compound, developed in many years of trial, resulting in a tough resilient material with excellent outdoor weathering performance.

Low Installation Cost

Tight dependable connections are made by solvent cement welding of uPVC pipes and fittings. This combined with other advantages of lightness, flexibility and the use of pre-fabrication techniques, can afford savings both in time and money. As it is the case with all materials, certain characteristics need to be considered during installation. Similarly, before installing uPVC it is necessary to take into account the following properties.

Effect of Low Temperature

The impact strength of uPVC pipes fittings decreases with reduction in temperature therefore increased care should be exercised if installation is carried out near 0°C.

Effect of Elevated Temperature

The uPVC remains stable under load to a temperature of approximately 75°C and is therefore satisfactory for use in soil or waste systems where continuous full bore discharges of effluent are unlikely to exceed this figure. The low thermal conductivity of the material does allow full bore discharges at higher temperatures provided the duration of discharge is limited to 2-3 minutes.

Specialized Applications

The systems are more than adequate for normal domestic applications in low and multi-rise dwellings. Where more specialized applications such as tea-makers, autoclaves, hospitals, industrial kitchens and laboratories are concerned, where prolonged discharges of liquids at elevated temperatures can occur, our technical department should be concerned.


Largest uPVC Pipes & Fittings Supplier

Exports to Saudi Arabia, Kuwait, Qatar, Bahrain, Oman, Syria, Jordan, Egypt and globally.

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