DUCTILE IRON PIPES C Class 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 pipe be used for underground fire protection systems?
- Yes, ductile iron pipe can be used for underground fire protection systems. Ductile iron is known for its strength, durability, and corrosion resistance, making it a suitable material for such applications. It can withstand high pressures and temperatures, ensuring reliable and long-lasting performance in underground fire protection systems.
- Q: How do ductile iron pipes handle thermal expansion and contraction?
- Ductile iron pipes are known for their excellent ability to handle thermal expansion and contraction. This is mainly due to their unique composition and design which allows them to withstand changes in temperature without experiencing significant damage or deformation. Thermal expansion occurs when a material expands due to an increase in temperature, while thermal contraction refers to the contraction that occurs when a material cools down. Ductile iron pipes can effectively accommodate these changes in temperature by utilizing their inherent flexibility and strength. One of the key factors that enable ductile iron pipes to handle thermal expansion and contraction is their high ductility, which refers to their ability to deform without breaking. This ductility allows the pipes to absorb the expansion and contraction forces without cracking or rupturing. Moreover, the composition of ductile iron pipes includes graphite nodules, which act as microcracks that can absorb stress and prevent the material from fracturing. This unique microstructure enhances the pipes' resistance to thermal expansion and contraction. In addition, ductile iron pipes are often designed with joints that allow for limited movement. These joints, such as mechanical joints or push-on joints, can accommodate the expansion and contraction of the pipes by providing a certain degree of flexibility. This helps to prevent the pipes from becoming overstressed or damaged. Overall, ductile iron pipes are specifically engineered to handle thermal expansion and contraction effectively. Their high ductility, unique microstructure, and joint design make them a durable and reliable choice for applications where temperature variations are expected.
- 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: Are ductile iron pipes suitable for acidic or alkaline environments?
- Yes, ductile iron pipes are suitable for both acidic and alkaline environments. They have excellent resistance to corrosion, making them a reliable choice for transporting fluids in a wide range of pH levels.
- Q: How are ductile iron pipes made?
- Ductile iron pipes are made using a specific manufacturing process known as centrifugal casting. This process involves pouring molten iron into a rotating mold, which is usually made of steel. The centrifugal force created by the rotation of the mold helps in distributing the molten iron evenly, ensuring the final product is of high quality. To begin the manufacturing process, a mixture of scrap iron, steel, and recycled material is melted in a furnace at extremely high temperatures. Once the molten iron reaches the desired temperature and consistency, it is ready to be cast into pipes. The rotating mold is first preheated to prevent the molten iron from cooling too quickly. The preheating process also helps in ensuring a smooth surface finish of the pipes. Next, the molten iron is poured into the rotating mold through a central sprue. As the mold spins, the molten iron is forced against the inner walls of the mold due to centrifugal force. This causes the iron to solidify rapidly, resulting in a dense, strong, and corrosion-resistant pipe. The centrifugal force also helps to remove any impurities or slag from the inner surface of the pipe, further enhancing its quality. Once the casting process is complete, the mold is allowed to cool, and the pipe is removed. The pipes are then subjected to various tests to ensure they meet the required quality standards. These tests may include checking the dimensions, mechanical properties, and surface finish of the pipes. After passing the quality tests, the ductile iron pipes are typically coated with a protective lining to prevent corrosion and extend their lifespan. This lining can be made of cement mortar, epoxy, or polyethylene, depending on the intended application of the pipes. In summary, ductile iron pipes are made through the centrifugal casting process, which involves pouring molten iron into a rotating mold. This process ensures the production of strong, corrosion-resistant pipes with a smooth surface finish.
- Q: Do rigid cement cast iron pipes need cement piers?
- Ductile weakness: ductile cast iron pipes connected by human factors such as the operation level of responsibility, influence, construction not convenient. The advantages of PE PE PE pipe has good corrosion resistance and its anti inorganic performance than that of the metal pipe is much stronger in the buried without corrosion, construction convenient. Small diameter PE pipe in the price performance ratio is better than that of steel and ductile iron.PE tube have disadvantages: benzene, gasoline, carbon tetrachloride and other organic solvents have certain effect on pe. If the organic solvent is infiltrated into the polyethylene, the swelling will occur, and its physical properties will be decreased. Its pressure resistance and temperature resistance are poor.
- Q: Can ductile iron pipes be used for gas distribution systems?
- Yes, ductile iron pipes can be used for gas distribution systems. Ductile iron pipes are known for their strength and durability, making them suitable for carrying various types of fluids, including natural gas. These pipes have excellent corrosion resistance and can withstand the high pressure and stress typically associated with gas distribution systems. Additionally, ductile iron pipes are cost-effective and have a long lifespan, making them a reliable choice for gas distribution networks.
- Q: What are the different accessories available for ductile iron pipe?
- There are several accessories available for ductile iron pipe, including but not limited to, flange adaptors, couplings, valves, fittings, joint restraints, gaskets, and tapping sleeves. These accessories help in connecting, repairing, and maintaining ductile iron pipe systems.
- Q: Can ductile iron pipes be used for gravity sewer systems?
- Certainly! Gravity sewer systems can utilize ductile iron pipes. Ductile iron pipes boast durability, strength, and corrosion resistance, making them appropriate for a range of purposes, such as sewer systems. These pipes possess remarkable tensile strength and can endure substantial pressure and heavy loads, which renders them well-suited for gravity sewer systems where wastewater naturally flows rather than requiring pumping. Moreover, ductile iron pipes boast an extended lifespan and necessitate minimal maintenance, thus proving to be a cost-efficient option for sewer infrastructure.
- Q: How are ductile iron pipes different from cast iron pipes?
- Ductile iron pipes are different from cast iron pipes in terms of their composition and properties. Ductile iron pipes are made from a type of cast iron that has been treated with magnesium to improve its strength and flexibility. This makes ductile iron pipes more durable, impact-resistant, and less prone to cracking or breaking compared to traditional cast iron pipes. Additionally, ductile iron pipes have a higher tensile strength, allowing them to withstand higher internal and external pressures. In summary, ductile iron pipes are a more modern and advanced version of cast iron pipes, offering improved performance and longevity.
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DUCTILE IRON PIPES C Class DN1000
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
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