延性铁管

ductile iron pipesSpecifications: 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 time 9) Checked by automatic inspection equipment10) 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) Packing: in bulk or container