ductile cast iron pipe k9: standard: ISO2531/BSEN545/ISO4179/ISO8179 Type: T-Type, N-Type Nominal Diameter: DN80~DN1200 ductile cast iron pipe k9 Standard: ISO2531/BSEN545/ISO4179/ISO8179Type: T-Type, N-TypeNominal Diameter: DN80,DN100,DN150,DN200,DN250,DN250,DN300,DN350,DN400,DN500,DN600,DN700,DN800,DN900,DN1000,DN1200 ductile cast iron pipe k9