ductile iron pipes

الوصف

Specifications:
1)  The standard of pipe: ISO ***1 - ***8, EN*******2 , K9
2)  Effective length: 6M when using bulk shipment way, or about 5.5M or 5.7M when
    in *0' container shipment way
3)  Inner cement line: Portland cement lining as per ISO***9
4)  Zinc coating: at least **0gsm as per ISO ***9
5)  Bitumen painting: at least *0um as per ISO ***9
6)  Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber
    tightness ring as per ISO***3
7)   DN *0 - 1,**0 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 equipment

*0)  Composition:
a)  C: 3.4 - 3.7%
b)  Si: 2.0 - 2.4%
c)  P: *0%
*3)  Hardness: <**0HB
*4)  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)