Ductile Iron Pipe(Self-anchored or Restrained Joint)

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 time
9)   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)