1) Ductile cast iron pipe fitting--Flange Adapter 2)Class K12,PN10/16/25/40 3)ISO2531,EN545, ... )Strength,Durability,Saf 1.Ductile cast iron pipe fitting--Flange Adapter produced according to ISO2531, EN545, BS4772, EN598, AWWA C110.2 ... ≥420MPa≥5%≥300MPa≤250HB Ductile cast iron pipe fitting--Flange Adapter