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Negative pressure leaktightness, angular deviation and deformation

Test methods

A sample (pipe and/or accessory) are subjected to two negative internal pressures for set periods of time, while the pipe is subjected to deformation and angular deviation at the outlet. The absence of any leakage is verified during the test.

Products to test

Plastics piping systems for civil works for water in:

  • Piping systems for water supply and for buried and above-ground drainage and sewerage under pressure - Unplasticized poly (vinyl chloride) (PVC-U) EN ISO 1452-1, -2, -3, -5.
  • Conveyance of water under pressure made of oriented unplasticized Poly (vinyl chloride) (PVC-O) ISO 16422
  • Water supply for buried and above ground drainage, sewerage and irrigation under pressure - Oriented unplasticized poly(vinyl chloride) (PVC-O) EN 17176-2, -5 / CEN/TS 17176-3.