DUCTILE IRON PIPE K9 DN1400

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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 the expected burst pressure of ductile iron pipes?: The expected burst pressure of ductile iron pipes can vary depending on several factors such as the pipe's diameter, wall thickness, and the specific grade of ductile iron used. However, ductile iron pipes are typically designed and manufactured to withstand high pressure loads. On average, ductile iron pipes have an expected burst pressure ranging from 350 psi (pounds per square inch) to 700 psi. However, it is important to note that this is a general range, and the actual burst pressure can be higher or lower depending on the specific design and manufacturing standards followed. To determine the exact expected burst pressure for a particular ductile iron pipe, it is recommended to consult the manufacturer's specifications or relevant industry standards such as the American Water Works Association (AWWA) C150 or ISO 2531, which provide guidelines for ductile iron pipes and their performance under various conditions. Additionally, local building codes and regulations may also provide specific requirements for ductile iron pipe installations.

Q: Are ductile iron pipes prone to leakage?: Ductile iron pipes are generally considered to be resistant to leakage. This type of pipe is known for its durability and strength, making it less prone to leaks compared to other materials like PVC or even cast iron pipes. Ductile iron pipes are designed to withstand high pressure and can withstand heavy loads, making them ideal for various applications such as water supply, sewage systems, and industrial pipelines. The unique properties of ductile iron, including its flexibility and ability to absorb vibrations and shocks, contribute to its resistance against leaks. Ductile iron pipes have a high tensile strength, which means they can handle the internal and external pressures exerted on them without cracking or breaking. Furthermore, ductile iron pipes have joints that are designed to be leak-proof. These joints are typically sealed with rubber gaskets and connected using various methods such as push-on joints or restrained joints with mechanical couplings. These joint designs ensure a secure and watertight connection, reducing the risk of leaks. However, like any other type of pipe, ductile iron pipes can still experience leaks under certain circumstances. Factors such as age, corrosion, poor installation, or ground movement can contribute to the development of leaks over time. Regular maintenance and inspections are important to identify and address any potential issues that may lead to leaks. Overall, while ductile iron pipes are generally resistant to leakage and known for their reliability, it is essential to ensure proper installation, regular maintenance, and timely repairs to maximize their longevity and prevent any potential leaks.

Q: Ductile iron pipe in the direction of it?: The utility model is mainly used for conveying water, and is an ideal choice for tap water pipes.

Q: Are ductile iron pipes resistant to biogenic sulfide corrosion?: Ductile iron pipes are known for their general resistance to biogenic sulfide corrosion. Biogenic sulfide corrosion is caused by the reaction between hydrogen sulfide gas, which is produced when organic matter decays, and metallic surfaces. However, ductile iron pipes have a protective layer called the cement mortar lining, which acts as a barrier against corrosive agents. This lining effectively resists the corrosive effects of biogenic sulfide, making ductile iron pipes a suitable choice for applications where this type of corrosion is a concern. In addition, the strength and durability of ductile iron pipes further contribute to their ability to resist biogenic sulfide corrosion.

Q: What is the maximum temperature that ductile iron pipe can handle?: The maximum temperature that ductile iron pipe can handle typically ranges between 350-400 degrees Fahrenheit.

Q: What does ductile iron pipe "K" mean?: K means wall thickness registration, general water supply and drainage, now China uses K9, and some countries in South America, such as Brazil, use K7.The wall is thick =k (DN/1000+0.5), such as K9's DN500 tube, with a wall thickness of =9* (500/1000+0.5) =9mm

Q: What is the expected joint deflection of ductile iron pipes?: The expected joint deflection of ductile iron pipes depends on various factors such as the diameter of the pipe, the type of joint used, and the specific conditions of the installation. In general, ductile iron pipes are designed to accommodate some degree of deflection at the joints to allow for flexibility and movement. The American Water Works Association (AWWA) provides guidelines for the maximum allowable joint deflection for ductile iron pipes. According to AWWA C151/A21.51, the maximum deflection at the joint should typically not exceed 3 degrees or 1% of the nominal pipe diameter, whichever is greater. It is important to note that joint deflection should be within the specified limits to ensure the structural integrity and performance of the pipeline system. Excessive joint deflection can lead to leaks, failures, and reduced lifespan of the pipes. To determine the exact expected joint deflection for a specific installation, it is best to refer to the manufacturer's specifications and guidelines, as they may vary depending on the pipe size, joint type, and other factors. Consulting with a qualified engineer or contacting the manufacturer directly can provide more accurate information tailored to the specific project requirements.

Q: Can ductile iron pipes be used for submarine pipelines?: Yes, ductile iron pipes can be used for submarine pipelines. Ductile iron is a strong and durable material that can withstand the harsh conditions underwater, making it suitable for submarine applications. Additionally, its corrosion resistance properties make it a reliable choice for transporting fluids in marine environments.

Q: How do ductile iron pipes handle ground settlement due to construction activities?: Ductile iron pipes have the ability to handle ground settlement caused by construction activities due to their flexibility and strength. These pipes are designed to withstand external pressure and can accommodate minor ground movements without significant damage or failure. The ductility of the material allows the pipes to deform slightly, absorbing the ground settlement and preventing them from cracking or breaking. Additionally, the joints in ductile iron pipes are typically flexible, allowing for further movement and reducing the risk of leakage or structural issues. Overall, ductile iron pipes are well-suited for withstanding ground settlement and ensuring the integrity of the pipeline system during construction activities.

Q: How does ductile iron pipe perform in extreme weather conditions?: Ductile iron pipes are renowned for their exceptional performance in adverse weather conditions. These pipes demonstrate remarkable durability, resistance, and flexibility, making them suitable for enduring harsh weather such as extreme temperatures, heavy rainfall, snowfall, and even earthquakes. One of the notable characteristics of ductile iron is its capacity to withstand damage caused by freezing temperatures. Unlike other materials, ductile iron pipes possess a low coefficient of thermal expansion, enabling them to resist the expansion and contraction that occurs during freeze-thaw cycles without experiencing cracks or breaks. Consequently, these pipes remain intact and continue to function optimally even in extremely cold conditions. Furthermore, ductile iron pipes exhibit excellent resistance to corrosion, rendering them highly resilient to the corrosive effects of severe weather. They are shielded by a sturdy zinc coating, which acts as a barrier against rust and other forms of corrosion. This coating, in conjunction with the inherent strength of ductile iron, grants these pipes exceptional resistance to the corrosive effects of rain, snow, and moisture. Moreover, ductile iron pipes possess superior flexibility, allowing them to accommodate ground movement and seismic activity. In areas prone to earthquakes or soil shifting, these pipes can absorb stress and strain without fracturing, guaranteeing a continuous supply of water and sewage services even in the most challenging weather conditions. Overall, ductile iron pipes excel in extreme weather conditions due to their durability, resistance to freezing, corrosion, and flexibility. Their ability to withstand the elements ensures an uninterrupted supply of water and sewage systems, providing reliability and peace of mind to utility providers and communities, even in the most unforgiving environments.

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