... . DUCTILE IRON PIPES:Mechanical (K-type) jointSIZE RANGE: From DN100mm to DN2600mm STANDARDS FOLLOW:ISO2531, ISO4179, ISO8179, ISO4633, ISO7186, EN545, EN598, BS4772 and other ... .Ø Metallic Zinc with finishing layer in accordance with ISO8179-1, with a mean mass of zinc coating not less than130 g/m2Ø Zinc-rich paint with finishing layer in accordance with ISO8179 ...