1) Ductile cast iron pipe fitting--Flange Adapter 2)Class K12,PN10/16/25/40 3)ISO2531, ... EN545,BS4772 4)Strength,Durability,Saf 1.Ductile cast iron pipe fitting--Flange Adapter produced according to ISO2531, EN545, BS4772, EN598, AWWA ... ≥700≥10 Pa≥10S Mechanical properties: NameTensile StrengthElongationYield StrengthHardnessDuctile iron fittings≥420MPa≥5%≥300MPa≤250HB