... --DN1400 2. K7&K9&K8 3.ling according to ISO4179 iso 2531 ductile iron pipe Standard: JIS, AISI, ASTM, GB, DIN, ENPlace of Origin: ... , construction and decorations, railroad vehicles.Some seamless stainless steel pipe/tube which has excellent corrosion resistant, mechanical properties are suitable ... Certificate is supplied with shipment, Third Part Inspection is acceptable. iso 2531 ductile iron pipe