... 2. K7&K9&K8 3.ling according to ISO4179 ductile iron socket spigot pipe Standard: JIS, AISI, ASTM, GB, DIN, ENPlace ... : pickled or sand blasting8.Steel Grade:200&300&400 series9.Packing: *seaworthy package *with plastic cap to protect both ends *plastic ... is supplied with shipment, Third Part Inspection is acceptable. ductile iron socket spigot pipe