... ,ISO4422, EN545,EN598,EN969,BS4772,AWWA C110/ C153, JIS G5526; Ductile iron pipe fittings1. Standards : ISO2531, ISO4422, EN545 , EN598 , EN969, BS4772 ... . material : GGG500-7 or other Ductile iron . 3. Coating : Fusion bonded epoxy coating ; cement lining inside and rich zinc primer and bitumen ... with plastic layer. 5. Accessories: NBR or SBR rubber seal ring,flange gasket, G.I steel or ductile iron ...