Hdpe pipes

Polyethylene is recognized internationally product for gas and water distribution. Polyetylene is flexible,leaktight and highly resistant to chemical attack. PE 80 and PE 100 pipes fittings are suitable for use where ground
movement is expected, where corrosive soils are present and where long ducts and flexibility in bending are required.

Scope and Field of Application

Although principally developed for conveying water
and gas, polyethylene pipes have many other applications.
HDPE pipes become widely adopted in a variety
of piping systems which are successfully used for many
applications some of which are:
1- Potable water supply and distribution pipelines
2- Drainage and sewerage
3- Irrigation systems
4- Fire fighting networks
5- Chilled water
6- Electrical conduits
7- Gas distribution
8- Industrial and chemical applications

General Properties

The properties of PE have been described as
- Light and easy to handle
- Impact resistant and long lasting
- Corrosion resistance
- Strong
- Conveniently Flexible
- Tough
- Resists cracking
- Low frictional resistance
- Resistance to chemical attack

Strength
The strength of a pipeline may beconsidered as the ability to withstand stress in the pipe material under internal pressure over a period of time. The design stress considered within the water industry is taken to be a life expectancy in excess of 50 years.

Toughness
In practice it is recognized that PE is a tough material. The many years of successful installation of PE pipe in the water and gas applications added confidence of this recognition.

Flexibility
The inherent flexibility and recovery of PE enables the pipeline to absorb impact loads, vibration and stress caused by soil or ground movement which implies that PE have useful fatigue characteristics where loading are present, 
( pumping and heavy traffic loading conditions).

The property of flexibility enables PE pipelines to be countered to difficult road layouts or rapid changes of direction.