... &K9&K8 3.ling according to ISO4179 ductile iron pipe dn 600 Standard: JIS, AISI, ASTM, GB, DIN, ENPlace of Origin ... standard toleranceShape: round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: 1000mm,3000mm,6000mmprice: factory ... with shipment, Third Part Inspection is acceptable. ductile iron pipe dn 600