DUCTILE IRON PIPE K8 DN500

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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:How much is the manual installation fee of ductile iron pipes from 100 to 150 per metre?: According to the various connection modes after the installation of artificial fee at =8.7~9.0 yuan (about /M this is pure artificial installation fee, no other costs to calculate, if packet labor costs and construction should be appropriately increased when installed).

Q:Are ductile iron pipes resistant to acid attacks?: Yes, ductile iron pipes are generally resistant to acid attacks. Ductile iron has a protective layer of graphite and a dense matrix structure that helps in preventing the penetration of acid. However, prolonged exposure to highly corrosive acids or extreme pH levels may still cause some degradation over time.

Q:What are the different joint types available for ductile iron pipe?: The different joint types available for ductile iron pipe include push-on joints, mechanical joints, restrained joints, and flanged joints.

Q:Are ductile iron pipes suitable for use in mining tailings pipelines?: Yes, ductile iron pipes are suitable for use in mining tailings pipelines. Ductile iron has excellent strength and durability properties, making it capable of withstanding the high pressure and abrasive nature of tailings. Furthermore, its corrosion resistance and ability to withstand harsh environmental conditions make it a reliable choice for mining applications.

Q:How is ductile iron pipe recycled?: Ductile iron pipe, a material known for its durability, is commonly used in infrastructure systems like water and wastewater pipelines. Rather than being disposed of in landfills, ductile iron pipe can be recycled when it reaches the end of its life cycle. The recycling process for ductile iron pipe begins by removing it from the ground. Typically, a trench is dug to access the pipe, which is then cut into smaller, manageable sections using specialized equipment. These sections are then transported to a recycling facility. At the recycling facility, the ductile iron pipe undergoes further processing to eliminate any contaminants. This involves removing any fittings or joints that may be attached to the pipe. Additionally, non-iron materials like rubber gaskets or coatings are separated and discarded. Once the pipe has been cleaned and prepared, it is usually crushed or shredded into smaller pieces. This increases the material's surface area, making it easier to melt down in the next stage of the recycling process. The crushed or shredded ductile iron pipe is then melted in a furnace at high temperatures, a process called smelting. Smelting converts the solid iron into a liquid state. During this process, impurities and any remaining non-iron materials rise to the surface and are removed. After smelting, the molten iron is poured into molds to create new products. These molds can produce various ductile iron products, including new pipes, fittings, valves, and manhole covers. The recycled ductile iron products possess the same qualities and durability as those made from virgin materials. Recycling ductile iron pipe not only reduces the need for new materials but also conserves energy and resources. The recycling process requires less energy compared to producing iron from raw materials, resulting in a lower carbon footprint. Furthermore, recycling ductile iron pipe helps minimize waste and promotes a circular economy by giving new life to a previously discarded material.

Q:Nodular cast iron, heat treatment process and so on: The chill is estimated to be too low in carbon equivalent, poorly bred or cooled too quickly!

Q:Are ductile iron pipes suitable for use in chemical processing plants?: Yes, ductile iron pipes are suitable for use in chemical processing plants. Ductile iron is known for its high strength and durability, making it resistant to corrosion and capable of withstanding high pressure and extreme temperatures. Additionally, its smooth internal surface reduces friction and allows for efficient flow of chemicals.

Q:How does ductile iron pipe perform in extreme temperatures?: Ductile iron pipe is renowned for its exceptional performance in extreme temperatures, thanks to its unique composition and manufacturing process. Its structural integrity remains uncompromised, allowing it to endure both high and low temperatures without issue. When it comes to high temperatures, ductile iron pipe showcases remarkable heat resistance. It can withstand temperatures of up to 1000 degrees Fahrenheit, making it perfect for applications involving hot liquids or gases, such as steam pipelines or industrial processes. Its strength and thermal stability enable it to maintain its shape and structural integrity even under extreme heat conditions, guaranteeing long-term reliability and safety. Similarly, ductile iron pipe excels in low-temperature environments. It can brave sub-zero temperatures without becoming brittle or prone to cracking, a common problem with materials like cast iron. This makes ductile iron pipe an ideal choice for applications in cold climates, such as water distribution systems in freezing temperatures. Moreover, the ability of ductile iron pipe to resist thermal expansion and contraction is another advantage in extreme temperatures. It has a low coefficient of thermal expansion, meaning it expands and contracts less compared to other materials. This property minimizes stress on the pipe, reducing the risk of leaks or failures caused by temperature fluctuations. In conclusion, ductile iron pipe demonstrates outstanding performance in extreme temperatures. Its heat resistance, ability to withstand low temperatures, and resistance to thermal expansion and contraction make it a reliable option for various applications, ensuring safe and efficient operations even in challenging environments.

Q:Can ductile iron pipe be used for both water and wastewater applications?: Yes, ductile iron pipe can be used for both water and wastewater applications. Ductile iron has excellent strength, durability, and corrosion resistance, making it suitable for conveying both clean water and wastewater effectively and safely.

Q:What are the advantages of using ductile iron pipe over concrete pipe?: Using ductile iron pipe instead of concrete pipe offers several advantages. To begin with, ductile iron pipe has a higher strength-to-weight ratio, making it capable of withstanding higher pressure and loads while being lighter. This makes it easier to handle and install, ultimately reducing labor costs and saving time. Additionally, ductile iron pipe has superior corrosion resistance, making it less susceptible to rust or degradation over time. This extends its lifespan and reduces the need for frequent repairs or replacements, making it a more cost-effective option in the long run. Moreover, ductile iron pipe is more flexible and resilient compared to concrete pipe. It can withstand ground movement, settling, and other environmental factors without cracking or breaking. This reduces maintenance and repair costs, ensuring its durability. Furthermore, ductile iron pipe has a smoother interior surface, resulting in improved flow characteristics and reduced friction. This allows for more efficient transportation of fluids and minimizes the risk of clogs or blockages, guaranteeing uninterrupted flow. Lastly, ductile iron pipe is highly versatile and suitable for a wide range of applications. It can be used for both above-ground and underground installations, making it ideal for various infrastructure projects such as water supply systems, wastewater treatment plants, and industrial applications. In conclusion, the advantages of using ductile iron pipe over concrete pipe include its higher strength-to-weight ratio, superior corrosion resistance, better flexibility and resilience, smoother interior surface, and versatility. These benefits make it a reliable and cost-effective choice for various infrastructure projects.

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