... 2. K7&K9&K8 3.ling according to ISO4179 flange t joint ductile iron pipe Standard: JIS, AISI, ASTM ... : round,square,rectangularsurface: pickled, acid, polished, black,ectcertificate: ISO, BV, API, CSC,DNV,ectnormal length: 1000mm,3000mm,6000mmprice: ... purpose parts, cutting tools, mechanical parts, petroleum refining equipment, bolts and nuts, pump rods, and kitchenware. Inspection:Chemical Analysis -- ...