ISO2531-1998,IS02531-2009. K And C Class We are the first one that produces centrifugal casting ductile ... : Ductile iron(1) The standed:ISO2531-1998,EN545-2006, C Class ,K9, K8(2) Effective length:6M by bulk shipment,5 ... + resin (epoxy) coating as per ISO8179.(4) DN80-DN1200mm(5) T-type(6) High strength ,lighter than gray iron, good corrosion ...