DUCTILE IRON PIPE K9 DN150

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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 are ductile iron pipes different from other types of pipes?: Ductile iron pipes, also known as DI pipes, are distinct from other types of pipes due to their unique properties and manufacturing process. Unlike other pipes such as PVC, steel, or concrete, ductile iron pipes are specifically designed to withstand high-pressure systems and offer exceptional strength and durability. One key difference lies in the material used. Ductile iron pipes are made from a type of cast iron that contains additional elements such as carbon and silicon, which give them their remarkable strength and flexibility. This composition allows DI pipes to handle high-pressure systems, making them suitable for applications that require reliable water supply, such as water mains, sewer systems, and industrial pipelines. Another distinguishing feature of ductile iron pipes is their ability to withstand external loads and pressure. DI pipes have a high tensile strength, which means they can bear heavy loads without cracking or breaking. This property makes them ideal for underground installations where they can endure the weight of soil, traffic, and other external factors. Furthermore, ductile iron pipes have excellent corrosion resistance. They are coated with a protective layer, usually through a process called cement lining, that guards against rust and corrosion caused by the elements, chemical reactions, or the transported fluids. This corrosion resistance significantly extends the lifespan of the pipes, reducing maintenance and replacement costs over time. Additionally, ductile iron pipes offer great flexibility. They are known for their ductility, meaning they can deform without fracturing under stress, making them less prone to cracks and leaks. This inherent flexibility allows them to withstand ground movement and seismic activities, ensuring a safe and reliable water distribution system. In terms of installation, ductile iron pipes are relatively easy to handle due to their lighter weight compared to other materials like concrete or steel. They are also available in various lengths and diameters, making them adaptable to different project requirements. Overall, ductile iron pipes stand out from other types of pipes due to their exceptional strength, resilience, corrosion resistance, and ease of installation. These properties make them a preferred choice for numerous infrastructure projects, where reliability and longevity are crucial factors.

Q:There are several forms of flexible interfaces for Spigot Cast Iron Pipes: China's production of "GB 13295-1991 centrifugal casting ductile iron pipe)," GB13294-1991 "provisions of nodular cast iron pipe annealing, centrifugal casting, water for ductile iron pipe pipe, pipe fittings, rubber technical performance, the interface type adopts slip type T shaped interface.

Q:What is the expected fire resistance of ductile iron pipes?: The expected fire resistance of ductile iron pipes can vary depending on several factors such as the thickness of the pipe walls, the quality of the installation, and the surrounding conditions. However, generally speaking, ductile iron pipes have a high fire resistance due to their durable and heat-resistant material composition. Ductile iron is made by adding a small amount of magnesium to cast iron, which enhances its strength and flexibility. This makes ductile iron pipes less susceptible to cracking or breaking under high temperatures compared to other materials like PVC or HDPE pipes. In terms of fire resistance, ductile iron pipes can withstand high temperatures for an extended period of time without significant structural damage. They have been tested and proven to maintain their integrity in fire conditions for up to 2-4 hours, depending on the specific pipe design and installation. It is important to note that while ductile iron pipes have a high fire resistance, they are not fireproof. In case of a fire, it is crucial to follow proper fire safety protocols and consult with professionals to ensure the safety of the system and surrounding infrastructure.

Q:What is the expected abrasion resistance of ductile iron pipes?: The expected abrasion resistance of ductile iron pipes is generally high, as they are known for their durability and ability to withstand wear and tear caused by abrasion over an extended period of time.

Q:Can ductile iron pipes be used in areas with high levels of hydrogen sulfide gas and corrosion potential?: Before making a decision, it is important to take certain factors into consideration when considering the use of ductile iron pipes in areas with high levels of hydrogen sulfide gas and corrosion potential. Ductile iron pipes display a strong resistance to corrosion, particularly when they are adequately protected with external coatings and linings. This characteristic makes them appropriate for environments with moderate levels of hydrogen sulfide gas and corrosion potential. Nevertheless, in areas with exceedingly high levels of hydrogen sulfide gas and severe corrosion potential, alternative materials such as corrosion-resistant alloys or specially coated pipes may be more suitable. To determine the suitability of ductile iron pipes, conducting a thorough evaluation of the specific conditions in the area is crucial. Factors such as the concentration of hydrogen sulfide gas, the presence of other corrosive elements or chemicals, and the overall corrosiveness of the environment should be taken into account. Furthermore, consulting the local regulations and industry standards is essential to ensure compliance and safety. In conclusion, while ductile iron pipes can withstand moderate levels of hydrogen sulfide gas and corrosion potential, it is necessary to conduct a comprehensive assessment of the specific conditions. In areas with high levels of hydrogen sulfide gas and severe corrosion potential, consulting with experts in the field and considering alternative materials may be required.

Q:What is the difference between ductile iron pipes and cast iron pipes?: Ductile iron pipes and cast iron pipes are both commonly used in various applications, but they differ in their composition, properties, and manufacturing processes. Composition: Ductile iron pipes are made from a type of cast iron known as ductile iron, which contains higher levels of carbon, silicon, and other alloying elements like magnesium. On the other hand, cast iron pipes are made from regular cast iron, which has a higher carbon content and lower levels of alloying elements. Properties: Ductile iron pipes are known for their high tensile strength, flexibility, and durability. They can withstand higher pressure and have a greater resistance to impact, making them suitable for applications that require robust performance. In contrast, cast iron pipes are more brittle and fragile, which makes them prone to cracking or breaking under pressure or impact. Manufacturing process: Ductile iron pipes are created through a process called centrifugal casting, where molten ductile iron is poured into a spinning mold. This centrifugal force helps in distributing the molten metal evenly, resulting in a strong and uniform pipe. Cast iron pipes, on the other hand, are made using a process called sand casting, where molten cast iron is poured into a mold made of compacted sand. This method is less precise and can lead to variations in the final product. Applications: Due to their superior strength and flexibility, ductile iron pipes are commonly used in water and sewage systems, as well as in industrial pipelines that require high-pressure resistance. Cast iron pipes, on the other hand, are typically used in non-pressure applications like drainage systems or underground sewer lines. In summary, the main difference between ductile iron pipes and cast iron pipes lies in their composition, properties, manufacturing processes, and applications. Ductile iron pipes offer greater strength, flexibility, and durability, making them suitable for high-pressure applications, while cast iron pipes are more brittle and commonly used in non-pressure applications.

Q:What is the weight of ductile iron pipes compared to other materials?: Ductile iron pipes are generally heavier than other commonly used materials such as PVC or HDPE pipes.

Q:Are ductile iron pipes suitable for use in irrigation sprinkler systems?: Yes, ductile iron pipes are suitable for use in irrigation sprinkler systems. Ductile iron pipes are known for their durability, strength, and corrosion resistance, making them an ideal choice for various applications, including irrigation systems. These pipes have a high tensile strength and can withstand high pressure and heavy loads, which is essential for maintaining a consistent water supply to sprinkler systems. Additionally, ductile iron pipes have a long lifespan, reducing the need for frequent maintenance and replacement, making them a cost-effective option for irrigation systems. Overall, ductile iron pipes are a reliable and suitable choice for use in irrigation sprinkler systems.

Q:What are the differences between cast iron pipes W and A?: W type socket cast iron drainage pipe made of stainless steel flexible clamp connection in the construction of the installation; A type cast iron drainage pipe with flexible flange and sealing ring connection in the construction of the installation; B type cast iron drainage pipe comprehensive advantages of W type and A type cast iron drainage pipe, straight pipe part adopts W type bearing mouth of pipe, pipe fittings with double flange structure;

Q:Do ductile iron pipes require external coatings or wraps?: Ductile iron pipes typically require external coatings or wraps to protect against corrosion. Despite being strong and durable, ductile iron is still prone to corrosion when exposed to specific environmental conditions. Applying external coatings or wraps adds an extra layer of protection, extending the lifespan and maintaining the structural integrity of the pipes. These coatings can vary and may consist of materials like epoxy, polyethylene, or zinc, acting as a barrier between the pipe surface and corrosive elements in the environment. Additionally, wraps made of materials such as polyethylene or polypropylene can provide mechanical protection against impact or abrasion. Therefore, it is generally advisable to apply external coatings or wraps to ductile iron pipes to enhance corrosion resistance and ensure long-term performance.

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