... --DN1400 2. K7&K9&K8 3.ling according to ISO4179 flange t joint ductile iron pipe Standard: JIS, AISI, ASTM, GB ... : round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: 1000mm,3000mm,6000mmprice: factory priceservice: OEM ... Certificate is supplied with shipment, Third Part Inspection is acceptable. flange t joint ductile iron pipe