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1) Standard: ISO2531, BSEN545
2) Effective length:DN80-DN1200 6M by bulk shipment,5.7M by20'or40’container;
3) Inner cement: Ordinary portland cement according to ISO4179, sulphate resistant cement
4) Outside coating: Zinc coating(≥130/m2) and bitumen paiting or epoxy paiting(≥70μm) according to ISO8179
5)Quality Contral:Matallqgraphic examination;Spectrum Analysis;Hardness Test;Tensile Test;Crush Test.
6) Diameter: DN80- DN2000
7) Joint type: T joint
8)High strength ,lighter than gray iron,good corrosion resistance,no furring,small flow resistance,easy fixing,long life time
9) Testing: factory inspection report, SGS inspection and the third inspection party;
10) Class: K7,K8, K9,K10
| Ductile cast iron pipe | Grey iron pipe | Steel pipe | |
| Tensile strength(Mpa) | ≥420 | 150--260 | ≥400 |
| Yield strength(Mpa) | ≥300 | 200--360 | No confirmation |
| Bending strength(Mpa) | ≥590 | Neglected | ≥400 |
| Elongation(%) | ≥10 | ≤230 | ≥18 |
| Brinell hardness(HBS) | ≤230 | About 140 | |
| After annealing,the microstructure of ductile cast iron pipes is ferrite and a little pearlite,possessing excellen mechanical properties. | |||
Production process flow of ductile cast iron pipes
Pipe hoisting
Take precaution of handling pipe with steel cable, hoisting belts and specialized rigging avoiding from pipes rocking. While using steel cable, single cable is not admitted, for the purpose of protecting outer anti-corrosion layer, steel cable should be packed by rubber or other similar material. While using hook, it also should be covered with rubber or other similar material for protecting cement lining layer. Especially for pipe with relative large diameter, hook should be mounted a gasket with same shapes as internal diameter of pipes while handling. It is not available fixing hook on the steel belts or socket side and spigot side of pipe while handling pipes in bundle.
Transportation
Put two pieces or more woods on the platform of the vehicle while transporting, pipes are laid on the wood and fixed by wedge. The part over the vehicle body should not be more the 1/4 of overall length of pipe. If pipes are piled up more than one layer, each layer of pipes should reverse, and buffering rubber or gasket should be put on the space between two layers of pipes, at last pipes are fixed up with steel cable and buffering gasket. Check often if pipes can fall out during conveying, and check if stop wedge is not hard up. The vehicle should slow down on the uneven road or while swerving.
Pipe storage
Under pipes there should be put wedge or crosstie while stacking pipes, and socket and spigot of pipes should be interleaved and on the stop wedge in case of pipe’s rolling. Uneven and serious polluted ground, or slope and marshy are not available.
The ductile iron pipes are sold for global of the chart
Competitive products
Our products ductile iron pipes from DN300mm to DN1000mm with epoxy coating inside or outside conform to ISO2531 standard. Epoxy has stronger adhesive force,lower contractibility, excellent mechanical and excellent mechanical properties and excellent chamical stability.
Ductile iron pipe which sprays epoxy has characters of corrosion resistant,alkali-resistant, acid-resistant, the layer is nice-looking, and has characters of innocuity, tasteless, and no-pollution, It conforms to requirement of permission for sanitation.