ductile iron socket spigot pipe 1.DN80--DN1400 2. K7&K9&K8 3.ling according to ISO4179 ductile iron socket spigot pipe Standard: JIS, AISI, ASTM, GB, DIN, ENPlace of Origin: TIANJIN China (Mainland)Brand Name: ZHCXModel Number: 200 300 400 600Type: SeamlessSteel Grade: 300 SeriesApplication: medichine,food, machine,industry,Certification: ISOWelding Line Type: ERWThickness: 0.5mm-40mmOuter ...