... 2. K7&K9&K8 3.ling according to ISO4179 ductile iron socket spigot pipe Standard: JIS, AISI, ASTM, GB, DIN, ENPlace ... applications, such as light industry, foodstuff, home electric appliances, kitchen articles, construction and decorations, railroad vehicles.Some seamless stainless steel pipe ... is supplied with shipment, Third Part Inspection is acceptable. ductile iron socket spigot pipe