Ductile iron pipe fitting 1) ISO2531/EN545/EN598 2) Ductile iron/Grey iron 3) Fusion bonded epoxy ... 4.Use:connect iron pipe materialCast ironGGG500-7, GGG450-10standardISO2531,EN545/598,BS4772,AS3996AWWA C110/C153,sizeDN50MM-1200MMmarketEurope,Middle east, Africa, America ...