Marley Pipesystems

Low mass
Ease of handling
Reduced installation time
Reduced transport costs

Corrosion resistance
Long, maintenance free, life span
Abrasion resistance

Excellent life span when pumping slurries
Smooth bore

Excellent flow characteristics
Lower pumping costs

Resilience
Minimal handling damage
Minimal installation damage

Wavisafe Z-Lok joint
Easy, effective, dependable joints

In SANS 966, there are 7 different pressure classes. These classes include suitable safety factors and are intended as a guide to trouble-free operation under average service conditions. There are however many factors which must be considered when determining the severity of service and the appropriate class of pipe. This section is provided as a guide to the designer in the light of his or her knowledge of the particular circumstances.

Amongst the factors to be considered are:

• Operating pressure characteristics:
  • Static conditions
  • Dynamic conditions
  • Water hammer
  • Cyclic loads
• Temperature
  • Effect on pressure
  • Effect on dimensions
• Trench load conditions
  • Soil loads
  • Traffic loads
• Bending
• Thrust support
• Flow considerations
• Selection of pipe size and class

Polyvinyl Chloride (PVC) is a thermoplastic material which consists of a PVC resin compounded with varying proportions of stabilisers, lubricants, fillers, pigments, plasticisers and processing aids. Different formulations of these ingredients are used to obtain specific properties for different applications. Pipes can therefore be developed to meet the requirements of a wide variety of applications and conditions. 

As an Aliaxis Company, Marley Pipe Systems is an environmentally conscious organisation that is committed to a policy that promotes the preservation of the environment through its operations by adhering to environmental regulations and standards for the vigilant management of energy and natural resources.

Marley Pipe Systems manufactures all PVC products to achieve various environmental and sustainability objectives by eliminating the use of heavy metals, manufacturing PVC pipes with environmentally friendly organics based stabilisers instead.

The attributes of PVC pipes present many benefits for both environmental sustainability and product performance:

• Not only is PVC cost-effective, but also resource efficient. PVC pipe production consumes less energy than other materials and also saves on scarce fossil fuels.

• According to failure statistics, PVC pipes have far less failures and are therefore tougher than other materials such as steel, clay, cast iron and ductile iron.

• PVC has been identified as one of the most recycled plastics which can be extruded without the loss of its mechanical properties and waste generated from the pipe extrusion process is crushed and reprocessed.

• The durability and corrosion resistance of PVC pipes translates into a longer lifespan and has been proven to last up to 50 years, saving on costs and reducing environmental impact.