6M Cement Lined Ductile Iron Pipe Zinc Spraying With ISO2531
Standard
Cement Lined Ductile Iron Pipe overview:
Ductile cast iron is kind of alloy of iron, carbon and silicon, in
which graphite exists in the type of spherical, generally the size
of graphite is 6-7 class, and spheriodization grade of the pipe
should be controlled 1-3 class(spheroidization rate is not below
80%). Thus after spheroidization, ductile cast iron possesses the
nature of iron as well as the characteristic of steel. After
annealing, its microstructure contains ferrite and a little
pearlite possessing excellent mechanical properties.
For pipes centrifugally cast, the minimum wall thickness, emin,
shall not be less than 3,0 mm. The nominal wall thickness, enom, is
equal to the minimum wall thickness, emin, plus (1,3 + 0,001 DN);
For pipes not centrifugally cast, the minimum wall thickness, emin,
shall not be less than 4,7 mm. The nominal wall thickness, enom, is
equal to the minimum wall thickness, emin, plus (2,3 + 0,001 DN);
For centrifugally cast pipes, nominal pipe wall thicknesses for
preferred ductile iron pressure classes are given in Table 14. For
other pressure classes, as given in Annex C, the user should
confirm the availability with the manufacturer.
Specifications:
1) The standard of pipe: EN598,ISO 2531, EN545 , .
2) Pipe class: K/Cetc.
3) Pipe joint:T-type, K type joint, self-restrained joint
4) Internal lining: cement mortar lining as per ISO4179
5) Zinc coating: at least 130g/m2 as per ISO 8179
6) DN 80 - 2,600 mm
Mechanical properties
a) Tensile strength: ≥420MPa
b) Yield strength: ≥300Mpa
c) Hardness: ≤230HB
d) Elongation%: DN80 - 1000 ≥10 DN1200 - 2200 ≥7
Packing: bundled with steel belts or in bulk
Shipment: in bulk or container
mechnical behavior:
| Ductile cast iron pipe | Common ash cast pipe | Steel pipe |
| Tensile strength(MPa) | ≥420 | 150--260 | ≥400 |
| Ductility(%) | <1000(mm) | ≥10 | Neglected | ≥18 |
| >1000(mm) | ≥7 | Neglected | ≥18 |
| Brinell hardness(HBS) | ≤230 | ≤230 | about 140 |
| After annealing,the microstructure of ductile cast iron pipes is
ferrite and a little pearlite,possessing excellent mechanical
properties. |
Other performance:
| The hydraulic test pressure of the ductile cast iron pipes is as
follows: |
| Nominal diameter(mm) | Hydraulic test pressure(MPa) |
| 80≤DN≤300 | 5.0 |
| 350≤DN≤600 | 4.0 |
| 700≤DN≤1000 | 3.2 |
| 1100≤DN≤2000 | 2.5 |
Usage:
Much of the production of ductile iron is in the form of ductile
cast iron pipe, used for water and sewer lines. Ductile cast iron
pipe is stronger and easier to tap, requires less support and
provides greater flow area compared with pipes made from other
materials like PVC, concrete, polyethylene or steel. Ductile Iron
Pipe is the most widely-used pipeline product in water supply and
water drain/sewage projects.
Our advantages:
There are lots of qualified managers and technicians, and a
well-trained team of after-sales service, which provides all
services of manufacture, package, transportation and installation.
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