... , ISO7186, EN545, EN598, BS4772 Standard. DUCTILE IRON PIPES:Mechanical (K-type) jointSIZE RANGE: From DN100mm to DN2600mm STANDARDS FOLLOW:ISO2531, ISO4179 ... can supply K7, K8, K10, K12 if requested.JOINT TYPE:Mechanical (K-type) jointINTERNAL LINING:Depending on the internal condition of use ... . Special packing can be arranged after mutually agreed. Mechanical (K-type) joint Ductile Iron Pipes