DUCTILE IRON PIPES K8 DN450

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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:Ductile iron pipe is how many years warranty: Ductile iron pipe is a kind of cast iron pipe. In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the material have been better improved, with the nature of iron and the properties of steel. Ductile cast iron pipe after annealing, the microstructure is ferrite and pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..

Q:How can 4 inch ductile iron pipe be connected with 2 inch galvanized pipe?: Ductile cast iron used for more than 18 by adding nodulizer, after centrifugal ductile cast iron machine high speed centrifugal cast pipe, called "ductile" (Ductile Cast Iron Pipes), referred to as ball pipe, ductile iron pipe and ductile iron pipe etc.. The utility model is mainly used for conveying water, and is an ideal choice for tap water pipes.

Q:How does ductile iron pipe perform in areas with high soil stability?: Ductile iron pipe performs exceptionally well in areas with high soil stability. Due to its inherent strength and durability, ductile iron pipe can withstand the pressure exerted by the soil without any significant deformation or failure. The high soil stability ensures that there are minimal ground movements, settling, or shifting, which further contributes to the excellent performance of ductile iron pipe. In areas with high soil stability, the pipe is less prone to experiencing external forces or stresses that could potentially cause damage. Ductile iron pipe has a high resistance to corrosion, abrasion, and impact, making it highly suitable for such conditions. The material's robustness allows it to withstand the weight and pressure of the soil, ensuring the structural integrity of the pipe is maintained over time. Moreover, ductile iron pipe's flexibility and joint design contribute to its performance in areas with high soil stability. The pipe's ability to accommodate small movements and minor ground shifts without compromising its integrity is advantageous in these stable soil conditions. The restrained joint system used in ductile iron pipe installations provides additional support and stability, minimizing the risk of pipe dislocation or failure. Overall, ductile iron pipe is a reliable and efficient choice for areas with high soil stability. Its strength, durability, and resistance to external forces make it well-equipped to handle the demands of such environments. Additionally, the pipe's flexibility and joint design ensure that it can adjust to minor soil movements, thus further enhancing its performance in these conditions.

Q:How are ductile iron pipes protected against erosion caused by high-velocity flow?: Ductile iron pipes are protected against erosion caused by high-velocity flow through various methods. One common approach is to apply an internal lining to the pipe, which can be made of materials such as cement mortar or polyethylene. This lining provides a smooth surface that reduces the friction and turbulence of the flowing water, thus minimizing the erosion potential. Additionally, external coatings, such as bitumen or epoxy, can be applied to protect the outer surface of the pipe from erosion caused by external factors like soil movement or abrasive materials. Regular inspection and maintenance of the pipes also play a crucial role in identifying and addressing any erosion-related issues to ensure their long-term durability.

Q:Can ductile iron pipes be used for bridge drainage systems?: Yes, ductile iron pipes can be used for bridge drainage systems. Ductile iron is a strong and durable material that is commonly used in various applications, including water and sewage systems. It has excellent corrosion resistance and can withstand heavy loads and pressure, making it ideal for bridge drainage systems. Additionally, ductile iron pipes have a smooth inner surface that allows for efficient water flow, preventing clogs and blockages. Therefore, ductile iron pipes are a suitable choice for bridge drainage systems due to their strength, durability, and ability to handle the required water flow.

Q:Can ductile iron pipes be used for underground slurry pipelines?: Yes, ductile iron pipes can be used for underground slurry pipelines. Ductile iron pipes are known for their strength, durability, and resistance to corrosion, making them suitable for a variety of applications including underground slurry pipelines. They provide a reliable and cost-effective solution for transporting slurry, which is a mixture of solids and liquids, over long distances. The inherent toughness and flexibility of ductile iron pipes allow them to withstand the abrasive nature of slurry and the external loads associated with underground installation. Additionally, ductile iron pipes can be easily joined using various methods, ensuring a secure and leak-free pipeline system. However, it is important to consider the specific properties of the slurry being transported and consult with experts to determine the appropriate pipe specifications and design considerations for the underground slurry pipeline.

Q:Is it better to use steel tubes or ductile iron pipes for water supply?: You need a definite environment to say which kind of pipe is good!1, ductile iron pipe is cheap, corrosion resistance, lack of toughness is poor, not easy to process;

Q:Are ductile iron pipes resistant to alkali attacks?: Ductile iron pipes have been proven to be highly resistant to alkali attacks. The material used in ductile iron pipes, known as ductile cast iron, is formulated with specific chemical compositions that provide exceptional corrosion resistance. This resistance extends to alkali attacks, which are chemical reactions that occur when alkaline substances come into contact with metals or other materials. Ductile iron pipes have a dense and protective oxide film on their inner and outer surfaces, which acts as a barrier against chemical attacks. This oxide film forms naturally over time, and its composition and structure provide excellent resistance to alkali attacks. Additionally, ductile iron pipes are often coated with various protective layers, such as epoxy or zinc, to further enhance their resistance to corrosion and chemical reactions. It is important to note that while ductile iron pipes are highly resistant to alkali attacks, the severity and concentration of the alkali substances can still impact their overall performance. In extreme cases, very high concentrations of alkali substances or prolonged exposure to aggressive alkaline environments may eventually cause some damage to the protective layers of the pipes. However, under normal conditions and within acceptable parameters, ductile iron pipes are considered to have excellent resistance to alkali attacks.

Q:How do ductile iron pipes perform in high-altitude areas?: Due to their inherent strength and durability, ductile iron pipes are highly effective in high-altitude regions. The exceptional properties of ductile iron, such as its high tensile strength and impact resistance, make it ideal for withstanding the challenges presented by high-altitude environments. One significant advantage of ductile iron pipes is their ability to endure both internal and external pressures. In areas with varying water pressure, these pipes can withstand such fluctuations without compromising their structural integrity. This guarantees a consistent and uninterrupted flow of water, eliminating the risk of pipe failures or leaks. Furthermore, ductile iron pipes possess excellent resistance against corrosion, which is crucial in high-altitude areas with unpredictable and harsh atmospheric conditions. The protective lining and external coatings of these pipes provide an additional layer of defense, ensuring their durability and reducing the need for frequent maintenance or replacements. Additionally, ductile iron pipes have a higher tolerance for temperature variations compared to other materials. In high-altitude regions where temperature fluctuations can be extreme, these pipes can withstand expansion and contraction without cracking or rupturing. This thermal stability is vital for maintaining the integrity of the pipeline system and preventing costly repairs. To summarize, ductile iron pipes are an ideal choice for high-altitude areas due to their strength, durability, resistance to pressure variations, corrosion resistance, and thermal stability. These properties make them a reliable option for water distribution systems in such environments, ensuring a continuous water supply without compromising safety or efficiency.

Q:Can ductile iron pipe be used for irrigation pumping stations?: Yes, ductile iron pipe can be used for irrigation pumping stations. Ductile iron pipe is commonly used in various applications, including irrigation systems, due to its durability and strength. It has high tensile strength and can withstand high pressure and heavy loads, making it suitable for irrigation pumping stations. Additionally, ductile iron pipe is resistant to corrosion, which is beneficial in irrigation systems where water is present. It is also easy to install and maintain, making it a cost-effective choice for irrigation projects.

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