... DN1400 2. K7&K9&K8 3.ling according to ISO4179 ductile iron pipe dn 600 Standard: JIS, AISI, ASTM, GB, DIN ... 300 SeriesApplication: medichine,food, machine,industry,Certification: ISOWelding Line Type: ERWThickness: 0.5mm-40mmOuter Diameter: 1.0mm-900mmProduct name ... : ASTM 304 High pressure steel prof...tolernace: normal standard toleranceShape: round,square ...