... CNBM ductile iron pipe ranges from DN80-DN2200mm (T-Type, Class K9), effective length 6m, comply with ISO2531 Standard Company ProfileCNBM ... International Standards. Our pipes are manufactured under the quality management system BS EN ISO 9001. After years of efforts, CNBM ... ductile iron pipe ranges from DN80-DN2000mm (Tyton, T-Type, Class K7/K8/K9), effective length: 6m, complying with ISO2531and ...