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Determination of opacity.

Test methods

The diffused and non-diffused luminous energy from 540nm to 560nm is measured through a sample (pipe or accessory), expressed as a percentage of the inciding light energy.

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
  • 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
  • Multilayer EN ISO 21003-1, -2, -3, -5
  • Raised temperature resistance (PE-RT) EN ISO 22391-1, -2, -3, -5