ICS 93.030; 23.040.05. Norma Europejska EN 13598-2:2020 Plastics piping systems for non-pressure underground drainage and sewerage - Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) - Part 2: Specifications for manholes and inspection chambers ma status Polskiej Normy.