Plastics piping systems for non-pressure underground drainage and sewerage - Unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 3: Guidance for assessment of conformity; German version CEN/TS 13598-3:2012
Deutsches Institut Fur Normung E.V. (German National Standard) , 07/01/2012
