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Longitudinal reversion. Oven air method.

Test methods

The reversion of a pipe sample is calculated under set time and temperature conditions and this is expressed as a percentage in the variation compared to the initial length. The absence of any changes to the appearance after heating is also verified.

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.
  • Drainage and sewerage without pressure made of unplasticized poly (vinyl chloride) (PVC-U) EN 1401-1.
  • Drainage and sewerage without pressure (structured wall) made of unplasticized poly (vinyl chloride) (PVC-U) EN 13476-1.
  • Conveyance of drainage and sewerage under pressure made of Polyethylene (PE) EN 12201-1, -2, -3, -5 / ISO 4427.
  • Buried drainage and sewage without pressure (structured wall) made of Polyethylene (PE) EN 13476-1, -2, -3.
  • Buried drainage and sewage without pressure (structured wall) made of Polypropylene (PE) EN 13476-1, -2, -3.
  • Conveyance of water under pressure made of oriented unplasticized Poly (vinyl chloride) (PVC-O) ISO 16422
  • Supply of buried and above ground drainage, sewerage and irrigation water under pressure - Oriented unplasticized poly(vinyl chloride) (PVC-O) UNE EN 17176-2, -5 / UNE-CEN/TS 17176-3.

Plastics piping systems for hot and cold water in buildings made of:

  • Polypropylene (PP) EN ISO 15874-1, -2, -3, -5
  • Reticulated polyethylene (PE-X) EN ISO 15875-1, -2, -3, -5
  • Polybutylene (PP) EN ISO 15876-1, -2, -3, -5
  • Chlorinated poly (vinyl chloride) (PVC-C) EN ISO 15877-1, -2, -3, -5
  • Raised temperature resistance (PE-RT) EN ISO 22391-1, -2, -3, -5

Plastics piping systems for building and discharge of waste water made of:

  • Unplasticized poly (vinyl chloride) (PVC-U) EN 1329-1.
  • Unplasticized poly (vinyl chloride) (PVC-U) (structured wall) EN 1453-1
  • Polypropylene (PP) EN 1451-1

Plastics piping systems for civil works for gaseous fuels. Polyethylene (PE).(EN 1555-1, -2, -5 / ISO 4437)