ISO 15874 — polypropylene (PP-R) pipes for hot and cold water. Wall thickness per SDR (Standard Dimension Ratio): t = OD / (2×SDR − 2).
Values in mm. Weight calculated as W = π × t × (OD − t) × 905 / 10&sup6; (kg/m, PP density 905 kg/m³).
— = SDR not available for this DN.