• DUCTILE IRON PIPE K8 DN1100 System 1
  • DUCTILE IRON PIPE K8 DN1100 System 2
  • DUCTILE IRON PIPE K8 DN1100 System 3
DUCTILE IRON PIPE K8 DN1100

DUCTILE IRON PIPE K8 DN1100

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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 is cast iron pipe, specification for cast iron pipe?
Ductile iron pipes are more expensive, but the production methods are different.
Q: Can ductile iron pipes be used for geothermal systems?
Yes, ductile iron pipes can be used for geothermal systems. Ductile iron is known for its strength, durability, and corrosion resistance, making it suitable for various applications including geothermal systems. These pipes can handle high temperatures and pressure fluctuations commonly found in geothermal systems. Additionally, ductile iron pipes have excellent thermal conductivity properties, allowing for efficient heat transfer between the geothermal fluid and the surrounding environment. Therefore, ductile iron pipes are a viable option for transporting geothermal fluids in geothermal systems.
Q: What is the composition of ductile iron pipes?
Ductile iron pipes are primarily composed of iron, along with small amounts of carbon, silicon, and other alloying elements. The iron content typically ranges from 90% to 94%, while carbon content is usually around 3% to 4%. Silicon is added in the range of 1.5% to 3%, which helps enhance the ductility and strength of the iron. Other alloying elements such as manganese, sulfur, and phosphorus may also be present in smaller quantities. The composition of ductile iron pipes is carefully engineered to achieve specific properties. The addition of carbon and silicon improves the hardness and strength of the iron, making it more suitable for demanding applications. The presence of these alloying elements also contributes to the ductility of the pipes, allowing them to be easily bent and molded without breaking. Overall, the composition of ductile iron pipes is designed to provide a balance between strength, ductility, and resistance to corrosion. This makes them ideal for use in water and sewage systems, where they can withstand high pressure, handle heavy loads, and resist the corrosive effects of water and other chemicals.
Q: Are ductile iron pipes suitable for trenchless installation methods?
Yes, ductile iron pipes are suitable for trenchless installation methods. Ductile iron pipes are known for their strength, durability, and flexibility, making them ideal for trenchless installation methods such as horizontal directional drilling (HDD) and pipe bursting. HDD involves drilling a small pilot hole underground and then pulling the ductile iron pipe through the hole, without the need for extensive trenching. Ductile iron pipes can withstand the pulling forces exerted during this process and can be easily guided through the underground path. Pipe bursting is another trenchless method where an existing pipe is replaced by breaking it apart while simultaneously pulling a new ductile iron pipe into place. The strength and flexibility of ductile iron pipes allow them to withstand the force required to burst the existing pipe and replace it with minimal disruption to the surrounding area. In both these trenchless installation methods, ductile iron pipes offer several advantages. They have a high resistance to corrosion and can withstand high-pressure applications, making them suitable for a wide range of underground environments. Ductile iron pipes also have a long service life, reducing the need for frequent replacement and maintenance. Overall, ductile iron pipes are a reliable and suitable choice for trenchless installation methods, providing efficient and cost-effective solutions for underground pipe installations.
Q: Can ductile iron pipes be used for both water and sewage systems?
Yes, ductile iron pipes can be used for both water and sewage systems. Ductile iron pipes are known for their strength and durability, making them suitable for various applications. They have excellent resistance to corrosion and can withstand high pressures, making them ideal for transporting both water and sewage.
Q: How are ductile iron pipes tested for hydrostatic pressure?
Ductile iron pipes are tested for hydrostatic pressure through a process called hydrostatic testing. This involves filling the pipes with water and pressurizing them to a specific level, usually higher than their intended operating pressure. The pipes are then monitored for any leaks or excessive deformation under the applied pressure. This test ensures the strength and integrity of the ductile iron pipes before they are put into service.
Q: Are ductile iron pipes suitable for gravity flow applications?
Yes, ductile iron pipes are suitable for gravity flow applications. Ductile iron pipes have high strength and durability, making them ideal for carrying fluids under gravity. They can withstand the pressure and weight of fluid flow without the need for additional support or reinforcement. Additionally, ductile iron pipes have excellent corrosion resistance, which ensures their long-term performance in gravity flow systems.
Q: What is ductile iron?
Ductile iron, after being treated with either magnesium or cerium, undergoes an improvement in its mechanical properties. This particular type of cast iron earns the name "ductile" due to its higher degree of ductility in comparison to other cast iron varieties. Ductility pertains to a material's capacity to stretch or deform without breaking. This quality renders ductile iron particularly ideal for applications that demand both high strength and resistance to wear and tear, such as pipes, automotive components, and machinery parts. The inclusion of magnesium or cerium during the manufacturing process aids in the formation of graphite within the iron's structure, contributing to its distinctive properties. This graphite formation serves to enhance the iron's flexibility and reduce its brittleness, enabling it to absorb shock and vibrations without fracturing. As a whole, ductile iron presents a fine balance between the strength of cast iron and the flexibility of steel, thereby establishing itself as a versatile material well-suited for diverse industrial applications.
Q: Are ductile iron pipes suitable for installation in areas with high soil settlement and consolidation?
Yes, ductile iron pipes are suitable for installation in areas with high soil settlement and consolidation. Ductile iron pipes have high strength and flexibility, allowing them to withstand ground movements without cracking or breaking. They are also resistant to corrosion, which further enhances their suitability for such environments.
Q: Can ductile iron pipes be used for marine applications?
Yes, ductile iron pipes can be used for marine applications. Ductile iron is known for its high strength and durability, making it suitable for various environments, including marine environments. It has excellent corrosion resistance properties, which enable it to withstand the harsh conditions of saltwater exposure. Additionally, ductile iron pipes have been used in marine applications such as wastewater treatment plants, desalination plants, and offshore platforms. However, it is important to consider proper coating and maintenance to enhance the longevity of ductile iron pipes in marine applications.

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