DUCTILE IRON PIPE K9 DN450

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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:Are ductile iron pipes resistant to microbiologically induced corrosion?: Yes, ductile iron pipes are highly resistant to microbiologically induced corrosion. The unique composition and structure of ductile iron make it less susceptible to the growth of microorganisms and the subsequent corrosion caused by them. Additionally, the protective oxide layer that forms naturally on the surface of ductile iron pipes provides an extra layer of defense against microbiological corrosion.

Q:What is the manufacturing process of ductile iron pipes? Thank you: Made of nodular cast iron: a strict chemical composition, the content of silicon in molten iron requirements than the original carbon gray cast iron, nodular cast iron in reduced manganese, phosphorus, sulfur content of two liquid iron tapping temperature cast iron is higher than the ash, than the compensation sphere, conceived at the disposal of liquid iron temperature. Off line ball three disposal, that is to add a liquid iron ball agent four inoculation disposal of five nodular cast iron activity is poor, thus shorten the larger, higher demand for pouring temperature and pouring system larger size, more use of the riser cold iron by one condensation heat treatment criterion six iron is iron carbon alloy carbon content greater than 2%, the carbon content in ordinary industrial pig iron containing C, SI and 2.5%--4%, and Mn, S, P and other elements, is a product of iron ores in blast furnace. According to the difference in the shape of the carbon in the pig iron, it can be divided into several kinds, such as steelmaking pig iron, forging pig iron and nodular cast iron.

Q:How are ductile iron pipes protected against erosion caused by high-velocity flow?: Various methods and techniques are used to protect ductile iron pipes from erosion caused by high-velocity flow. One effective method involves applying protective coatings on the inner surface of the pipes. These coatings act as a barrier between the flowing water and the pipe material, minimizing the abrasive effects of the fast flow. Depending on the specific requirements of the application, coatings such as epoxy, polyurethane, or cement-mortar lining may be used. In addition, manufacturers often design the pipes with increased wall thickness in areas prone to erosion, such as bends or sections with high flow velocity. This additional thickness provides extra strength and resistance against erosion. Another technique used to safeguard ductile iron pipes from erosion is the implementation of flow control devices, such as flow deflectors or fittings that reduce velocity. These devices help redirect the flow and decrease its speed, thus minimizing the impact on the pipe walls. Regular maintenance and inspections are also vital to prevent erosion. By monitoring the condition of the pipes and identifying any early signs of erosion, appropriate measures can be taken to address the issue before it worsens. This may involve repairing or replacing damaged sections of the pipes and implementing erosion control measures like sediment filters or flow restrictors. Overall, a combination of protective coatings, design considerations, flow control devices, and proactive maintenance strategies are employed to ensure adequate protection of ductile iron pipes against erosion caused by high-velocity flow.

Q:Are ductile iron pipes suitable for trenchless pipe bursting methods?: Indeed, ductile iron pipes prove to be an appropriate choice for trenchless pipe bursting techniques. Displaying exceptional strength and durability, ductile iron emerges as a material capable of enduring the formidable forces implicated in the pipe bursting procedure. Its remarkable tensile strength safeguards against the occurrence of cracks or fractures during the bursting process. Moreover, the inner surface of these pipes boasts a smooth texture, which facilitates the efficient flow of fluids such as water. The aforementioned smoothness further diminishes the odds of encountering blockages or accumulation within the pipe. All things considered, ductile iron pipes represent a dependable alternative for trenchless pipe bursting methods.

Q:Are ductile iron pipes suitable for use in mining applications?: Yes, ductile iron pipes are suitable for use in mining applications. They possess excellent strength, durability, and resistance to corrosion, making them ideal for transporting fluids and materials in the harsh and demanding conditions of mining operations. Additionally, their ductility enables them to withstand high pressures and impacts, ensuring reliable performance and long service life in mining environments.

Q:How do ductile iron pipes handle soil movement?: Ductile iron pipes are known for their excellent strength and durability, making them highly capable of handling soil movement. These pipes are designed to resist external loads and pressures caused by soil settlement, ground shifting, or other environmental factors. One of the key features of ductile iron pipes is their flexibility. Unlike rigid materials such as cast iron or concrete pipes, ductile iron pipes have a certain level of elasticity that allows them to withstand soil movement without cracking or breaking. This flexibility enables the pipes to absorb the stresses induced by the soil, preventing any significant damage to the pipeline system. Furthermore, ductile iron pipes possess high tensile strength, which means they can resist pulling forces resulting from soil movement. The pipes can withstand the expansion and contraction of the surrounding soil, reducing the risk of pipe deformation or failure. Moreover, ductile iron pipes are often installed with proper bedding and backfilling techniques to further enhance their ability to handle soil movement. Adequate bedding materials, such as crushed stone or sand, are used to provide stable support to the pipes and distribute the external loads evenly. This helps to minimize the impact of soil movement on the pipes and maintain their structural integrity. In summary, ductile iron pipes are designed to effectively handle soil movement due to their flexibility, high tensile strength, and proper installation methods. These pipes can withstand the stresses induced by soil settlement, ground shifting, or other soil-related factors, ensuring reliable and long-lasting performance in various environmental conditions.

Q:Are there any alternatives to ductile iron pipe for water distribution?: There are various options available for water distribution besides ductile iron pipe. Some commonly used alternatives include: 1. PVC (Polyvinyl Chloride) Pipe: PVC pipe is frequently chosen for water distribution due to its affordability, durability, and resistance to corrosion. It is lightweight, easy to install, and requires minimal maintenance. 2. HDPE (High-Density Polyethylene) Pipe: HDPE pipe is a flexible and durable choice for water distribution. It is resistant to corrosion, chemicals, and UV rays, making it suitable for both aboveground and underground installations. HDPE pipe is also known for its leak-free joints and long lifespan. 3. PEX (Cross-linked Polyethylene) Pipe: PEX pipe, a flexible plastic pipe, is commonly utilized for water distribution in residential and commercial settings. It is recognized for its ability to withstand freezing, scaling, and corrosion. PEX pipe is easy to install, has fewer joints, and is highly durable. 4. Copper Pipe: Copper pipe has a long history of use in water distribution due to its exceptional resistance to corrosion and extended lifespan. Although it is more expensive than other alternatives, copper pipe is renowned for its reliability and ability to handle high pressure. 5. Steel Pipe: Steel pipe is a robust and durable option for water distribution, particularly in high-pressure scenarios. It can endure extreme temperatures and resist external loads. However, steel pipe is more costly and requires specialized installation techniques. When selecting an alternative to ductile iron pipe for water distribution, it is crucial to consider factors such as cost, durability, corrosion resistance, installation requirements, and specific project needs.

Q:A tube is used only in ductile iron pipes, isn't it?: 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:What is the expected thrust restraint method for ductile iron pipes?: The expected thrust restraint method for ductile iron pipes is typically achieved through the use of thrust blocks or restraints, which are designed to counteract the forces generated by the fluid pressure within the pipeline. These blocks or restraints are typically made of concrete or other sturdy materials and are strategically placed at bends, tees, and other locations where changes in direction occur. They help to anchor the pipes and prevent them from moving or being displaced due to the thrust forces.

Q:Can ductile iron pipes be repaired if they get damaged?: Yes, ductile iron pipes can be repaired if they get damaged. The repair process involves identifying the damaged portion of the pipe and assessing the severity of the damage. If the damage is minor, it can be repaired using various techniques such as welding or epoxy lining. For more extensive damage, sections of the pipe may need to be replaced. Pipe repair professionals have the expertise and equipment to identify and fix damaged ductile iron pipes, ensuring their continued functionality and longevity.

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