1) The standard of pipe: ISO 2531 - 1998, EN545-2002, K9
2) Effective length: 6M (negotiable)
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 - 2600 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)