Description
Ductile iron pipe Detailed Description
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 line 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.*8%
D) S: <0.**5
*1) Pull strength: >**0MPa
*2) Yield: >*0%
*3) Hardness: <**0HB
*4) K type mechanical joint with flange and bolts available
*5) 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)
