DUCTILE IRON PIPE K8 DN1200

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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 are the different methods for joining ductile iron pipe?: There are several methods for joining ductile iron pipe, each with its own advantages and limitations. One common method is mechanical joint (MJ) coupling, which involves using a rubber gasket and a set of bolts and nuts to create a watertight seal between pipe sections. This method is relatively quick and easy to install, but it requires a skilled technician to ensure proper alignment and bolt tightening to prevent leakage. Another method is flanged joint, where the pipe ends are equipped with flanges that are bolted together using gaskets to create a tight seal. This method allows for easy disassembly and reassembly of pipe sections, making it suitable for applications that require frequent maintenance or modifications. However, it is more expensive and time-consuming compared to other methods. One widely used method is push-on joint (POJ), which involves using a rubber gasket and a special lubricant to slide the pipe ends together. This method provides a reliable and watertight seal, and it is relatively quick and easy to install. However, it requires proper alignment and care to avoid damaging the gasket during assembly. Another option is restrained joint (RJ), which uses a mechanical joint coupling with additional features to resist axial forces or thrusts. This method is commonly used in applications where the pipe is subject to internal pressure, external loads, or seismic activity. It provides a secure and rigid connection but may require specialized tools and training for installation. Finally, welding is another method for joining ductile iron pipe. It involves heating the pipe ends and melting a filler metal to create a permanent bond. This method provides a strong and durable connection, but it requires skilled welders and additional time for preparation, welding, and cooling. Welding is often used for specific applications, such as joining sections of pipe with different diameters or connecting to other materials. In summary, the different methods for joining ductile iron pipe include mechanical joint coupling, flanged joint, push-on joint, restrained joint, and welding. The choice of method depends on factors such as the application requirements, installation time, maintenance needs, and budget.

Q: Is the cast iron pipe buried in need of antiseptic treatment? What kind of anticorrosive materials are used?: It must be antiseptic. Usually hot asphalt brush painted two times, winding glass fiber cloth two road, cross construction.

Q: Are ductile iron pipes suitable for mining applications?: Yes, ductile iron pipes are suitable for mining applications. Ductile iron is a type of cast iron that has been treated to enhance its strength, durability, and ductility. These pipes are known for their high tensile strength and resistance to corrosion, making them ideal for underground mining operations where they may be exposed to harsh conditions. One of the key advantages of ductile iron pipes in mining applications is their ability to withstand high pressure and heavy loads. They have excellent structural integrity and can resist both internal and external forces, ensuring reliable performance in demanding mining environments. Additionally, ductile iron pipes have a long service life and require minimal maintenance. They are highly resistant to abrasion, which is crucial in mining operations where abrasive materials like rocks, minerals, and ores are present. The smooth inner surface of these pipes also minimizes friction, allowing for efficient transportation of mining materials. Moreover, ductile iron pipes are cost-effective compared to alternative materials like steel or concrete. They have a lower upfront cost and require less frequent replacements, resulting in reduced long-term expenses for mining companies. In conclusion, ductile iron pipes are well-suited for mining applications due to their strength, durability, resistance to corrosion and abrasion, long service life, and cost-effectiveness. These pipes provide reliable and efficient transportation of mining materials, contributing to the overall efficiency and productivity of mining operations.

Q: Do ductile iron pipes require additional protection against external factors?: It is necessary to provide extra protection for ductile iron pipes due to external factors. Despite being strong and durable, ductile iron pipes are susceptible to corrosion and other threats that can cause pipe failure. The primary external factor that ductile iron pipes require protection from is corrosion. Corrosion can weaken the pipe over time and is caused by certain chemicals present in soil or water. To prevent corrosion, ductile iron pipes are often coated with substances like polyethylene or zinc. This coating acts as a barrier, safeguarding the pipe against corrosive elements and prolonging its lifespan. In addition to corrosion, ductile iron pipes may also need protection against physical damage. These pipes are typically buried underground, making them vulnerable to forces like heavy machinery, ground movement, and vandalism. To protect against physical damage, ductile iron pipes can be encased in concrete or surrounded by a protective sleeve or casing. Furthermore, ductile iron pipes may require protection against soil conditions that can lead to pipe movement or shifting. In areas with unstable soil, it may be necessary to implement measures such as proper bedding and backfilling techniques, as well as the use of anchoring devices. These measures ensure the stability and integrity of the pipes. To conclude, although ductile iron pipes are strong, they still need additional protection against external factors. This includes preventing corrosion, protecting against physical damage, and addressing soil conditions. By implementing these protective measures, the lifespan and performance of ductile iron pipes can be significantly extended, ensuring the reliable transportation of water and other fluids.

Q: What is the wall thickness of K10 grade dn=400 ductile iron pipe?: Ductile iron pipe, class K10, DN400 theoretical weight table:Grade K10, DN400 ductile iron pipe wall thickness (T):9mm.Nominal diameter (DN) 400mm, its outer diameter (DE) 429mm.The approximate weight (kg) 29.5. of the crown of the socket;Straight part weight per meter (kg) 83.7.Total quality (kg) (length standard 6000mm) 532.Total mass (kg) (standard work length 5000mm) 448.The main characteristics of ductile iron pipes: ductile iron pipe is a kind of cast iron pipe. Having the nature of iron; 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: What is the expected bending stress capacity of ductile iron pipes?: The expected bending stress capacity of ductile iron pipes varies depending on the specific grade and size of the pipe, as well as factors such as installation conditions and external loads. However, ductile iron pipes generally have high strength and flexibility, allowing them to withstand significant bending stresses. It is recommended to refer to the manufacturer's specifications and engineering guidelines for a more accurate estimation of the bending stress capacity of a particular ductile iron pipe.

Q: What are the different sizes of ductile iron pipes available?: Ductile iron pipes come in a range of sizes to meet different needs and purposes. Typically, the diameter of these pipes varies from 3 inches to 64 inches. This variety in sizes offers versatility and adaptability in various sectors such as water supply, sewage systems, irrigation, and industrial piping. Smaller ductile iron pipes, with diameters ranging from 3 to 12 inches, are commonly used for residential and small-scale purposes like household plumbing, fire hydrant systems, and small irrigation projects. These sizes are commonly found in urban areas and residential neighborhoods. For larger-scale applications, larger ductile iron pipes are employed. These pipes can have diameters ranging from 14 to 64 inches. They are primarily used in municipal water supply systems, wastewater treatment plants, and industrial facilities where there is a need for high-volume water flow. The wide array of sizes available in ductile iron pipes ensures that they can accommodate different flow rates and pressure requirements. This allows engineers, contractors, and designers to choose the appropriate size based on the specific demands of a particular project or application. To ensure the proper selection of ductile iron pipe size for a specific project, it is essential to consult industry standards, local regulations, and engineering guidelines. This ensures that the pipes meet the required performance standards and are suitable for the intended use.

Q: How do ductile iron pipes handle ground settlement near construction sites?: Ductile iron pipes are highly resilient and can withstand ground settlement near construction sites. Due to their flexible nature, these pipes can accommodate small movements and settlement without incurring significant damage or failure. The ductility of the material allows the pipes to bend and adjust to the changing ground conditions, ensuring their integrity and minimizing the risk of leaks or breakage. Additionally, the strong and durable properties of ductile iron make it a reliable choice for underground infrastructure, providing long-term stability even in challenging environments.

Q: Can ductile iron pipe be used for marine applications?: Ductile iron pipe is suitable for marine applications due to its high strength, durability, and resistance to corrosion. This type of cast iron possesses properties that make it ideal for use in various marine environments, including those with saltwater. Marine applications commonly utilize ductile iron pipes for tasks such as seawater intake and outfall systems, offshore oil and gas platforms, submarine pipelines, and marine dredging projects. The corrosion-resistant nature of ductile iron protects against the harsh conditions found in marine environments, including corrosive saltwater, tidal currents, and marine organisms. Furthermore, ductile iron pipes have excellent mechanical properties, including high tensile strength and impact resistance, which further enhance their suitability for marine applications. In conclusion, ductile iron pipe is a reliable and cost-effective choice for a wide range of marine applications.

Q: Can ductile iron pipes be used in areas with high levels of groundwater contamination?: Areas with high levels of groundwater contamination can make use of ductile iron pipes. Ductile iron, known for its strength and durability, is resistant to corrosion, making it suitable for various environments, including those with contaminated groundwater. It provides a high level of resistance to chemicals and can withstand the corrosive effects of contaminants that may be present in the groundwater. Furthermore, ductile iron pipes possess a protective lining, further enhancing their corrosion resistance. However, it is important to consider that the suitability of ductile iron pipes in such areas relies on the specific nature and concentration of contaminants in the groundwater. Seeking advice from experts and adhering to local regulations and industry standards is essential to ensure the proper selection and installation of pipes in areas with high levels of groundwater contamination.

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