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Determination of creep ratio.

Test methods

A sample (pipe) is subjected to a constant compression force for 1008 hours. The deformation is recorded at set intervals to obtain representation over time and to calculate the creep coefficient as a ratio between the extrapolated deformation value over two years and the measured deformation at 6 minutes (0.1 hours).

Products to test

Plastics piping systems for civil works for the conveyance of buried drainage and sewage without pressure (structured wall) made of:

  • Unplasticized poly (vinyl chloride) (PVC-U) EN 13476-1, -2, -3
  • Polyethylene (PE) EN 13476-1, -2, -3
  • Polypropylene (PP) EN 13476-1, -2, -3