Plastics piping systems for drainage, sewerage and water supply, pressure and non-pressure – Glass-reinforced thermosetting plastics (GRP) based on polyester resin (UP) – Guidance for the assessment of conformity; German version CEN/TS 14632:2006
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 09/01/2006

Plastics piping systems for drainage, sewerage and water supply, pressure and non-pressure – Glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) – Guidance for the assessment of conformity; German version CEN/TS 14632:2012
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 05/01/2012