DUCTILE IRON PIPES K9 DN80

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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:Are ductile iron pipes suitable for power plant applications?: Yes, ductile iron pipes are suitable for power plant applications. Ductile iron pipes are known for their high strength and durability, making them capable of withstanding the high-pressure and high-temperature conditions typically found in power plants. Additionally, ductile iron pipes have excellent corrosion resistance, which is crucial in power plant environments where water and chemicals are often present.

Q:Are ductile iron pipes resistant to microbiologically induced corrosion?: Yes, ductile iron pipes are generally resistant to microbiologically induced corrosion (MIC). Ductile iron is a type of cast iron that has been treated with magnesium to give it increased strength and flexibility. This treatment creates a protective layer on the surface of the iron, making it less susceptible to corrosion caused by microorganisms. MIC occurs when certain types of bacteria, fungi, or other microorganisms interact with the metal surface of pipes and produce corrosive byproducts. However, ductile iron is generally resistant to MIC because the protective layer formed during the manufacturing process acts as a barrier, preventing microorganisms from directly contacting the metal surface. Additionally, ductile iron pipes are often lined with cement mortar or other protective coatings, which further enhance their resistance to corrosion. These linings provide an additional layer of protection against microorganisms, reducing the potential for MIC. Despite these inherent resistance properties, it is important to note that the resistance to MIC can vary depending on the specific conditions and environment in which the pipes are installed. Factors such as water quality, temperature, and the presence of certain microorganisms can influence the susceptibility of ductile iron pipes to MIC. Therefore, it is essential to consider these factors and take appropriate measures to prevent MIC, such as regular monitoring of water quality, proper maintenance, and the use of corrosion inhibitors or biocides when necessary.

Q:Can ductile iron pipe be used for fire protection systems?: Ductile iron pipe is indeed applicable for fire protection systems. Renowned for its robustness and longevity, ductile iron pipe proves to be an apt choice for multiple purposes, such as fire protection systems. Its remarkable tensile strength and ability to withstand cracking and fracture make it a dependable option for the conveyance of water and other fire suppression agents. Moreover, the corrosion resistance properties of ductile iron pipe guarantee enduring effectiveness and dependability within fire protection systems. Consequently, ductile iron pipe emerges as a fitting and frequently employed material for fire protection systems, owing to its strength, durability, and resistance to corrosion.

Q:Can ductile iron pipes be installed outdoors?: Graphite is exist in spherical form, usually graphite size is 6-7, casting spheroidization grade control requirements for 1-3 quality (spheroidization rate greater than 80%), so the mechanical properties of the material itself has been improved, has the essence of iron, steel performance. The annealed ductile iron pipe is composed of ferrite and pearlite. The mechanical properties of the ductile iron pipe are better.

Q:Can ductile iron pipes be used in contaminated groundwater systems?: Yes, ductile iron pipes can be used in contaminated groundwater systems. Ductile iron pipes are known for their high strength and durability, making them suitable for various applications including water and wastewater systems. They have corrosion resistance properties that protect against internal and external corrosion, making them a reliable choice for transporting water, even in contaminated groundwater systems. When dealing with contaminated groundwater, it is essential to consider the level and type of contamination present. Ductile iron pipes are resistant to many common chemicals found in groundwater, such as certain acids and alkalis. However, in cases of severe or specific chemical contamination, it may be necessary to consider alternative pipe materials that offer better resistance to those specific substances. Furthermore, proper installation and maintenance practices are crucial to ensure the long-term performance of ductile iron pipes in contaminated groundwater systems. Regular inspections, cleaning, and the use of appropriate protective coatings can help mitigate any potential risks associated with contamination. Overall, ductile iron pipes can be effectively used in contaminated groundwater systems, provided the level and type of contamination are within acceptable limits and proper installation and maintenance practices are followed. It is always recommended to consult with experts and consider local regulations and guidelines when making decisions regarding the suitability of pipe materials in specific groundwater systems.

Q:General cast iron prices now: Hello friends, Tianjin is in Shandong Qingdao 6500 7300 yuan / ton to 7100 yuan a ton of Zhejiang 7500 to 9000 yuan a ton, this is a great relationship, and the production of raw materials, for reference only, we are ductile casting manufacturers, the information can not say 100% accurate but can reference.

Q:Method for cutting large diameter ductile iron pipe: When the volume ratio of oxygen and acetylene is less than 1, a carbonized flame is obtained. Because of less oxygen and incomplete combustion, the flame is longer than the neutral flame and the temperature is lower. Acetylene in the carbide flame is suitable for welding high carbon steel, cast iron and cemented carbide materials. When welding other materials with a carbide flame, the weld metal becomes hard and brittle.

Q:How do ductile iron pipes handle water velocity?: Ductile iron pipes are well-suited to handle water velocity due to their unique mechanical properties. Ductile iron is a highly durable and strong material that can withstand high water velocities without experiencing significant damage or deformation. The pipe's inherent ductility allows it to absorb the energy created by the flowing water, which helps to minimize the risk of pipe failure or bursting. This property makes ductile iron pipes capable of handling high-pressure water flow, making them ideal for applications where water velocity is a concern. Additionally, ductile iron pipes have a smooth internal surface, which promotes efficient water flow and minimizes friction losses. This smoothness reduces the resistance encountered by the water as it flows through the pipe, allowing for higher water velocities without compromising the pipe's integrity. Furthermore, ductile iron pipes can be manufactured in various sizes and thicknesses, allowing for customization based on specific water velocity requirements. This flexibility ensures that ductile iron pipes can effectively handle a wide range of water velocities, from low-flow applications to high-velocity scenarios. In summary, ductile iron pipes have excellent handling capabilities when it comes to water velocity. Their strength, ductility, and smooth internal surface contribute to their ability to withstand high water velocities without compromising their structural integrity, making them a reliable choice for water distribution systems.

Q:How do ductile iron pipes handle water hammer?: Ductile iron pipes are well-suited to handle water hammer due to their inherent strength and flexibility. The high tensile strength of ductile iron helps absorb and dampen the pressure surges caused by water hammer, preventing any significant damage to the pipes. Additionally, the inherent ductility of these pipes allows them to flex and absorb the impact of water hammer, reducing the likelihood of cracks or bursts. Overall, ductile iron pipes provide a reliable and durable solution for managing water hammer in water distribution systems.

Q:What's the difference between grey cast iron pipe and ductile iron pipe?: Ductile iron is close to medium carbon steel and is much cheaper. Vermicular graphite iron is the best, but grey iron is worse and white iron is the worst. Therefore, the quality of ductile iron pipe with better quality and price is superior to other cast iron pipe fittings.

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