... standard Our Factory have 18 years production history in pe pipe fittings,Mainly for gas, water and drain outlet. We use ... make safer.Diameter size from 50mm to 500mm 1. Mateiral : PE100/PE80,SDR11 /SDR172. Used in gas ,water , drain outlet3. Certification ... Standard: EN1555-3, EN12201-3. GB15558.2,GB13663.2 hdpe pipe fittings electrofusion elbow