... 2. K7&K9&K8 3.ling according to ISO4179 ductile cast iron pipe k9 Standard: JIS, AISI, ASTM, GB, DIN ... ,Certification: ISOWelding Line Type: ERWThickness: 0.5mm-40mmOuter Diameter: 1.0mm-900mmProduct name: ASTM 304 High pressure steel ... ASME, GB, DIN, JIS, T14975, etc.4.Out Diameter: 6-830 mm5.Wall Thickness:0.5-40 mm6.Length ... shipment, Third Part Inspection is acceptable. ductile cast iron pipe k9