ISO 4427 — polyethylene (PE 100) pipes. Wall thickness per SDR (Standard Dimension Ratio): t = OD / (2×SDR − 2).
Values in mm. Weight calculated as W = π × t × (OD − t) × 955 / 10&sup6; (kg/m, HDPE density 955 kg/m³).
— = SDR not available for this DN.