One leading Manufacturers of C25, C30, C40 K9 Ductile Iron pipe in China

Specifications: 1)  The standard of pipe: ISO 2531 - 1998, EN545-2002 , K9 2)  Effective length: 6M when using bulk shipment way, or about 5.5M or 5.7M when in 20' container shipment way 3)  Inner cement line: Portland cement lining as per ISO4179 4)  Zinc coating: at least 130gsm as per ISO 8179 5)  Bitumen painting: at least 70um as per ISO 8179 6)  Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber tightness ring as per ISO4633 7)   DN 80 - 1,200 mm 8)   High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time9)   Checked by automatic inspection equipment

10)  Composition: a)  C: 3.4 - 3.7% b)  Si: 2.0 - 2.4% c)  P: <0.08% d)  S: <0.015 11)  Pull strength: >420MPa 12)  Yield: >10% 13)  Hardness: <230HB 14)  Process and testing: a)  Blast furnace (Analysis of raw materials test ) b)  Mg treatment (Micro & chemical composition test) c)  Pipe spinning (Temperature test) d)  Heat treatment (Micro structure; Flattening test) e)  Zinc coating (Thickness testing) f)  Dimensional checks (Thickness & Dia. testing) g)  Hydraulic test (Pressure test) h)  Internal lining (Thickness testing) i)  External coating (Thickness test)