DUCTILE IRON PIPES K8 DN1000

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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: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:What is the expected roughness coefficient of ductile iron pipes?: The expected roughness coefficient of ductile iron pipes can vary depending on various factors such as pipe diameter, age, and condition. However, in general, the roughness coefficient for ductile iron pipes is typically around 0.01-0.015 mm. This value represents the average roughness of the internal surface of the pipe and is used in hydraulic calculations to determine the flow characteristics and pressure losses within the pipe network. It is important to note that these values are approximate and can vary based on specific pipe conditions and applications.

Q:Are ductile iron pipes suitable for underground applications?: Indeed, underground applications are well-suited for ductile iron pipes. Renowned for their durability, strength, and resistance to corrosion, these pipes emerge as an excellent option for installations that lie beneath the surface. Their ability to withstand immense loads, ground shifts, and external pressure further solidifies their appropriateness for burial underground. Moreover, given the challenges associated with access and maintenance in underground scenarios, the fact that ductile iron pipes boast a lifespan of over 100 years becomes invaluable. In conclusion, the reliability and suitability of ductile iron pipes for underground applications are underscored by their robustness and longevity.

Q:Can ductile iron pipe be used for underground fire protection systems?: Yes, ductile iron pipe can be used for underground fire protection systems. Ductile iron pipe is a durable and reliable material that is commonly used in various applications, including water and wastewater systems, as well as fire protection systems. It has excellent strength, corrosion resistance, and longevity, making it suitable for underground installations. When it comes to fire protection systems, ductile iron pipe can effectively handle high-pressure water flow and withstand extreme conditions, making it an ideal choice for underground installations. It is capable of withstanding the intense heat and pressure that may occur during a fire event. Additionally, ductile iron pipe is available in various sizes and configurations, allowing for flexibility in design and installation. It is also compatible with different types of fittings and accessories, making it easy to connect to other components of the fire protection system. Overall, ductile iron pipe is a reliable and durable choice for underground fire protection systems, providing the necessary strength and longevity to ensure the safety of the premises and its occupants.

Q:What is the weight of a typical ductile iron pipe?: The weight of a typical ductile iron pipe can vary depending on its size and wall thickness. Generally, ductile iron pipes are available in sizes ranging from 3 inches to 64 inches in diameter. The weight of these pipes can range from a few pounds per foot for smaller sizes to several hundred pounds per foot for larger diameters. Wall thickness also plays a significant role in determining the weight of the pipe. Thicker walls will result in a heavier pipe. For instance, a 10-inch ductile iron pipe with a wall thickness of 0.25 inches may weigh around 26 pounds per foot, whereas a 24-inch ductile iron pipe with a wall thickness of 0.5 inches can weigh approximately 175 pounds per foot. It is important to consult specific manufacturer specifications or engineering references to determine the precise weight of a particular ductile iron pipe.

Q:Can ductile iron pipes be used for underground fuel storage systems?: Underground fuel storage systems can utilize ductile iron pipes, which offer superior strength, durability, and flexibility compared to traditional cast iron pipes. These properties render ductile iron pipes suitable for a range of applications, including underground fuel storage. An important advantage of ductile iron pipes is their resistance to corrosion, a crucial factor for underground storage systems that may encounter various fuels and chemicals. Furthermore, their high tensile strength and resilience enable them to withstand external pressure and loading, ensuring the integrity and safety of the underground storage system. Additionally, ductile iron pipes boast a long lifespan, typically lasting for several decades. This longevity makes them a cost-effective option for underground fuel storage systems, as they can bear the weight of stored fuel and potential ground movements while maintaining the structural integrity of the system over time. Nevertheless, it is worth noting that the appropriateness of ductile iron pipes for underground fuel storage systems may depend on other factors, such as local regulations, soil conditions, and the specific fuel being stored. To ensure compliance and safety, it is always advisable to seek guidance from professionals and adhere to relevant guidelines when designing and installing such systems.

Q:Are ductile iron pipes suitable for use in chemical processing plants?: Ductile iron pipes can be used in chemical processing plants. This type of cast iron, known as ductile iron, has improved mechanical properties that make it resistant to corrosion and suitable for handling various chemicals in industrial settings. It is recognized for its durability, flexibility, and high tensile strength, allowing it to withstand the often present high-pressure and temperature conditions in chemical processing plants. Moreover, ductile iron pipes have a smooth internal surface, reducing friction and the possibility of flow blockages or contamination. In conclusion, ductile iron pipes are a dependable and cost-effective option for transporting chemicals in chemical processing plants.

Q:What are the differences between cast iron pipes W and A?: W cast iron pipe is subdivided into W cast iron pipe and W1 cast iron pipe, the difference between them is the difference between the wall thickness. Because of the cold weather, the requirements for pipes are higher. The W cast iron pipes are mainly used in the north, while the W1 cast iron pipes are mainly used in the south.

Q:Are ductile iron pipes suitable for potable water distribution systems?: Yes, ductile iron pipes are suitable for potable water distribution systems. Ductile iron is a type of cast iron that is known for its high strength and durability, making it an excellent choice for conveying drinking water. These pipes are resistant to corrosion, which is essential for maintaining the quality and safety of potable water. Additionally, ductile iron pipes have a smooth interior surface, which helps to minimize the accumulation of sediments and biofilms that can affect water quality. They also have the ability to withstand high pressure and temperature changes, making them suitable for various potable water distribution systems. Overall, ductile iron pipes are a reliable and widely used option for ensuring the delivery of safe and clean drinking water to communities.

Q:How is ductile iron different from cast iron?: Ductile iron is different from cast iron in terms of its composition and mechanical properties. While both are types of iron alloys, ductile iron contains small amounts of additional elements, such as carbon, silicon, and magnesium, which enhance its strength, ductility, and impact resistance. This makes ductile iron more flexible and less brittle compared to cast iron. Additionally, ductile iron has a higher tensile strength and can withstand higher pressure and stress, making it suitable for applications where cast iron may fail.

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