MPVC Pipes

MPVC has been used successfully in Southern Africa, Australia and New Zealand for over 15 years and proven one of the most cost-effective and energy efficient piping materials. The reason for this is the lower long-term safety factor which may be used with tough materials. Toughness can be defined as resistance to impact and resistance to cracks, i.e. toughness prevents cracks from starting (initiation) and also prevents the propagation of cracks through the pipe wall. Cracks or notches may be initiated during handling or installation or during service due to bending stresses and point loads on the pipe. Brittle failure does not occur with tough materials having predictable failure properties; therefore the material's toughness bears a direct relationship with the long-term safety factor.

Pipe Standards

PVC-M (50mm-500mm)

  • SANS 966-2 Standard
  • 25 MRS (MPA)
  • 18.0 Design stress
  • 1.4 Safety factor
Sizes All pipes are made to provide an effective length of 6.0 meters from 50 mm — 250 mm and 5.8 meters from 315 mm — 500 mm after installation; the outside diameters are the same for all pressure classes of the same size and there are 5 classes of pipes.
  • Modified polymers achieve improvement in resistance to cracking.
  • Minimization of the effect of stress concentrators such as scratches.
  • Reduction in the factor of safety.
  • Higher wall stresses are allowable, which lead to reduced wall thickness.
  • The increased internal diameter for a given external diameter than PVC-U and ductile iron.
  • Depending on size and class, weight savings in excess of 10% over PVC-U.
  • PVC-M pipes will not affect the taste, smell, appearance or health aspects of drinking water.

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