DUCTILE IRON PIPES C Class DN900
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Ductile Iron Cast Pipe is without any defects compare with tradition casting tech, which has many advantages particularly as follow:
(1) High density. In the "vertical upward casting" process, the melt iron of centre liquid column in center crystallizer is continuously feeding for volume shrinkage caused by condensation tube at outer circumference , which lead to be free of shrinkage porosity.
(2) High purity. When melt iron pouring, the mixed impurities such as gas, dross, sand grain which are lighter than melt iron could be eliminated at furnace mouth, its impossible to enter into the crystallizer through the channel, so the melt iron into the crystallizer is very pure.
(3) Strength with toughness. The cooling speed provided by continuous crystallizer is 30 times than sand casting and 5 times than centrifugal casting, and doesn't produce white iron, the eutectic cell volume of continuous cast iron is one eighth to one tenth compare with traditional cast iron. The density of graphite nodule in ductile iron can reach 300-700 pcs/mm2. Therefore, all reason above improve the strength and toughness of continuous cast iron.
(4) Free machining. The high speed cooling make the hardening phase (such as boride, steadite) not appear like reticular, massive or thick, but diffuse like fish bone and pane in shape, moreover, there are tiny graphite flakes inlaid hardening phase. It's free machining in BrinellHardness the range of 250-300HB. However, the Brinell Hardness of 250 is top limit to common metal materials.
(5) Uniform composition of tube wall. The convection mixing of liquid column caused by marching type drawing in crystallizer make the composition of tube wall well-distributed, and concentration gradient very little.
(6) High productivity. To the wall thickness of tube under 10mm, the speed of continuous casting is 1 meter/min, to the wall thickness of tube under 20mm, the speed of continuous casting is 0.5 meter/min, which is high efficiency that centrifugal or other casting tech couldn't reach.
- Q: What new technologies are there for the installation of ductile iron pipes?
- Type W: type W tube in the same pipe with high strength, low noise, good fireproof performance, long service life, with the characteristics of flexibility and good seismic performance, but also has synchronous construction, utilization rate is high, easy to pipe, reducing the hydraulic test of pipeline clearing times, shorten the construction period to improve economic benefits. In addition, this type of interface with bolts in the lateral fastening, avoids the defects of socket flexible interface flange is easy to damage, close to the wall to the fixed bolt, has the advantages of simple operation, so in the selection of building drainage pipes and fittings, with strong competitiveness. In addition, because the length of W pipe is 3M, the number of intermediate joints is greatly reduced, and any length can be intercepted in accordance with the requirements, thereby greatly saving the pipe material, reducing consumption and cost. W type socket with stainless steel hoop rib clamp, lined with rubber ring flexible connection, seismic performance and good sealing performance, no leakage and allowed to swing in a certain range. Therefore, W tubes are widely used both at home and abroad.
- Q: Does the cast iron pipe for spheroidal graphite need corrosion protection when laying underground?
- In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the cast iron pipes, ductile iron pipes and finished product libraries can be better improved, with the nature of iron and the properties of steel
- Q: How are ductile iron pipes protected against freeze-thaw cycles?
- Ductile iron pipes are protected against freeze-thaw cycles by using a combination of insulation, proper installation techniques, and the addition of corrosion inhibitors or anti-freeze agents in the water supply. This helps prevent the expansion and contraction of the pipes caused by freezing and thawing, reducing the risk of damage or cracking.
- Q: Can ductile iron pipes be used for above-ground installations?
- Yes, ductile iron pipes can be used for above-ground installations. They have excellent strength and durability, making them suitable for various applications, including above-ground installations where corrosion resistance and structural integrity are required.
- Q: How do ductile iron pipes handle ground movement near rivers and lakes?
- Ductile iron pipes are well-suited to handle ground movement near rivers and lakes due to their unique properties and construction. These pipes are made from a type of cast iron that is known for its high strength and flexibility, making them highly resistant to ground movement and other external forces. One of the key features of ductile iron pipes is their ability to withstand bending and stretching without breaking. This flexibility allows the pipes to adapt to ground movements, whether they are caused by natural factors like soil settling, erosion, or even seismic activity. The pipes can absorb and distribute the stress caused by ground movement, reducing the risk of cracks or fractures. Additionally, ductile iron pipes have a high impact resistance, which means they can withstand external forces such as pressure from shifting soil or heavy equipment. This makes them less susceptible to damage during ground movements near rivers and lakes where erosion or flooding can occur. Furthermore, ductile iron pipes have a smooth internal surface, which reduces friction and resistance to flow. This ensures efficient water transportation even in areas with ground movement, preventing any potential blockages or disruptions to the water supply system. To enhance their resistance to ground movement, ductile iron pipes are often installed using flexible joints, such as restrained joints or push-on joints, depending on the specific project requirements. These joints allow the pipes to move slightly without causing damage to the overall system, providing additional protection against ground movement near rivers and lakes. In summary, ductile iron pipes are highly capable of handling ground movement near rivers and lakes due to their strength, flexibility, impact resistance, and smooth internal surface. These qualities make them a reliable choice for water transportation systems in areas prone to ground movement, ensuring a durable and efficient infrastructure for the supply of water.
- Q: Are ductile iron pipes suitable for use in industrial applications?
- Yes, ductile iron pipes are suitable for use in industrial applications. They have excellent strength and durability, making them ideal for transporting water, chemicals, and other fluids in industrial settings. Ductile iron pipes are also resistant to corrosion, which is crucial for maintaining a long lifespan in industrial environments. Additionally, their flexibility and ease of installation make them a cost-effective choice for industrial applications.
- Q: How can the ductile iron pipes be treated with corrosion protection?
- Epoxy coal tar coatingThe epoxy coal tar coating is not only suitable for gas pipelines, but also for sewage pipes. It is a two component coating with a high adhesion and a very smooth surface
- Q: How to control mortar proportioning in ductile iron pipe cement coating
- The calculation steps are: first to calculate the amount of plastering engineering (area), and then check the "national construction basic quota" quota in the corresponding amount of mortar project, engineering quantity multiplied by the amount of mortar that fixed amount of mortar, the mortar amount multiplied by the corresponding mix ratio of mortar, the consumption of raw materials can be obtained.
- Q: Does the cast iron have size 250? What's the performance?
- 1, cast iron because of low melting point, casting process performance is good, because it has been widely used.2, the relative gray iron ductile iron, have higher tensile strength and impact toughness, which has better mechanical performance.
- Q: Will the quality of ductile iron shrink?
- I am a professional casting, I can certainly tell you what he said, there is no basis, you see, the concave is due to do not have a good time, where the hot metal supplement
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DUCTILE IRON PIPES C Class DN900
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
OKorder Financial Service
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