ISO2531,EN545 Thickness Class : K9 , PN16/25/40 SIze : DN80-DN1200 Inner cement line: Portland ... : 1) The standard of pipe: ISO 2531 - 1998, EN545-2002 , K9 2) Effective length: 6M when using bulk shipment way, or ... tightness ring as per ISO4633 7) DN 80 - 1,200 mm 8) High strength, lighter than gray iron, good corrosion resistance ... forward to your support and co-operation! DUCTILE IRON PIPE K9