Ductile iron pipe s Competitive prices Prime quality Best service Quice deliver time Ductile iron pipe, DN80-DN800,K7-K12, GB13295,ISO2531,EN545,EN598, ... 4) Inner cement: Ordinary portland cement, sulphate resistant cement, high-alumina cement;5) Outside coating: Zinc coating(130g/m2 ... bitumen paiting or epoxy paiting(70um or more);6) Joint type: T joint7) Gasket: SBR, NBR, EPDM; ISO4633 / EN681-18) ...