... K9 length: 6M standard: EN545, ISO 2531 DN250 cast iron pipestandard: EN545, ISO 2531length: 6Mthickness:K9size: DN80-DN1000 T ... 80mm to 1200mm including accessories and fittings. Ductile iron pipes specifications: Ductile iron pipes, k9, according to ISO 2531 / BS ... resistant cement# externally with bitumen over zinc coating. Ductile iron can supplied from the following: Italy, China & IranPlease ...