... , 3.For gas,water,oil,etc 4.SDR11/SDR17 HDPE pipe fittingHDPE Butt fusion flange adapter/stub FittingsSize From 20mm---500mm ... Product Standard: EN1555-3, EN12201-3. GB15558.2,GB13663.24. Used for hot water and cold water and gas,oil transpotation5 ... can supply:black or according to customer6. Welding connect7. OEM accept8. High quality and competitive price9. SDR11/SDR17 hdpe pipe fitting with flange