CNBM ductile iron pipe ranges from DN80-DN2200mm (T-Type, Class K9), effective length 6m, comply with ISO2531 Standard Company ProfileCNBM ... ductile iron pipe ranges from DN80-DN2000mm (Tyton, T-Type, Class K7/K8/K9), effective length: 6m, complying with ISO2531and EN545 ... .Packing: In bulk vessel or in container. ISO2531 T-Type Class K9 ductile iron pipe