DIN 16962 Pipe joint assemblies and fittings for types 1 and 2 polypropylene (PP) pressure pipes; injection moulded reducers and nipples for socket welding; dimensions
DIN 8078:1996 Polypropylene (PP) pipes - PP-H (Type 1), PP-B (Type 2), PP-R (Type 3) - General quality requirements and testing