DUCTILE IRON PIPES K8 DN350

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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 suitable for use in food processing plants?: Yes, ductile iron pipes are suitable for use in food processing plants. Ductile iron pipes have a number of characteristics that make them highly suitable for this application. Firstly, ductile iron pipes are strong and durable, capable of withstanding high-pressure applications. This is important in food processing plants where the pipes are subjected to various pressures during the transportation of liquids and slurries. Additionally, ductile iron pipes have excellent corrosion resistance. This is crucial in food processing plants where the pipes come into contact with different types of food, beverages, and cleaning agents, which can be corrosive over time. The corrosion resistance of ductile iron pipes ensures the integrity of the pipes and prevents contamination of the food products. Furthermore, ductile iron pipes are highly resistant to temperature fluctuations, making them suitable for the extreme temperature conditions often found in food processing plants. They can withstand both hot and cold fluids without any adverse effects on their structural integrity. Moreover, ductile iron pipes have a smooth inner surface, which helps to maintain the quality and purity of food products. The smooth interior minimizes the formation of deposits, such as scaling or biofilm, and reduces the risk of bacterial growth. This is essential in food processing plants where maintaining a hygienic environment is of utmost importance. Lastly, ductile iron pipes are easy to install and maintain. They have a long service life and require minimal maintenance, reducing downtime and associated costs in food processing plants. Considering these factors, ductile iron pipes are a reliable and suitable choice for use in food processing plants, ensuring the safe and efficient transportation of fluids while meeting the stringent hygiene and quality requirements of the industry.

Q:Are ductile iron pipes suitable for deep burial installations?: Indeed, deep burial installations can accommodate ductile iron pipes. These pipes possess remarkable strength and endurance, rendering them highly suitable for subterranean purposes. They possess the ability to withstand the immense pressure exerted by soil as well as any external forces that may arise. Moreover, ductile iron pipes exhibit exceptional resistance to corrosion, a vital characteristic for ensuring long-lasting performance in buried settings. Furthermore, their flexibility enables them to endure ground movements and settle without fracturing. All in all, ductile iron pipes represent a dependable and economically efficient option for deep burial installations.

Q:Can ductile iron pipes be used in areas with high levels of groundwater contamination?: Yes, ductile iron pipes can be used in areas with high levels of groundwater contamination. Ductile iron is highly corrosion-resistant, making it suitable for such environments. Additionally, these pipes have a long lifespan and can withstand external pressures, making them a reliable choice for transporting water in contaminated areas.

Q:Are ductile iron pipes suitable for landfill leachate collection?: Yes, ductile iron pipes are suitable for landfill leachate collection. Ductile iron pipes have excellent strength and durability, making them capable of withstanding the harsh and corrosive nature of landfill leachate. Additionally, they have a long lifespan and are resistant to both external and internal corrosion, making them a reliable choice for this application.

Q:What are the typical joint sealing requirements for ductile iron pipes under pressure?: To ensure a secure connection without any leakage, ductile iron pipes under pressure typically require the use of gaskets and mechanical joints. Gaskets, commonly made of rubber or synthetic materials, are positioned between the pipe ends to establish a tight seal. These gaskets are designed to withstand the pressure of the fluid flow and prevent any leaks. They also provide flexibility to accommodate slight misalignment or pipe movement. Another commonly employed method for sealing ductile iron pipes is through mechanical joints, such as push-on joints or restrained joints. These joints securely hold the pipe ends together, eliminating the need for additional gaskets while providing a dependable seal. To guarantee effective joint sealing, proper installation techniques are crucial. This involves correctly aligning the pipes, appropriately tightening bolts or screws, and utilizing suitable lubricants or sealants. It's important to acknowledge that the specific joint sealing requirements for ductile iron pipes under pressure may differ based on the application, the type of fluid being transported, and the relevant industry standards or regulations. Therefore, consulting the manufacturer's guidelines and applicable codes is vital to determine the appropriate joint sealing requirements for a specific project.

Q:What are the different types of thrust restraints for ductile iron pipe?: Ductile iron pipe installations utilize various thrust restraints to prevent pipe movement or separation caused by internal pressure, external loads, or temperature changes. 1. Concrete thrust blocks are structures installed at bends, tees, and directional changes in the pipeline. Their purpose is to transfer thrust forces to the surrounding soil or foundation, effectively resisting pipe movement. 2. Mechanical restraints, such as tie rods or harnesses, are steel-based devices that apply external force to restrain the pipe. They can be adjusted to accommodate changes in pipe length or alignment. 3. Pipe anchors, made of steel, are installed at intervals along the pipeline to provide resistance against axial movement. These anchors are embedded into the surrounding soil or concrete, securing the pipe firmly. 4. Thrust collars, typically made of steel, encircle the pipe to prevent movement or separation. They are strategically placed along the pipeline to absorb thrust forces. 5. Restrained joint systems are specialized pipe joints designed to resist axial forces. They possess additional features like keyways or wedges, enhancing resistance against movement. Selecting the appropriate thrust restraint system for ductile iron pipe installations depends on factors such as pipe diameter, operating pressure, soil conditions, and potential external loads. Consulting with qualified engineers or pipe manufacturers ensures the proper selection and installation of thrust restraints.

Q:Does the cast iron pipe need separate corrosion protection?: No, the inner and outer corrosion protection of the tube has been done.

Q:The difference between cast iron pipe and ductile iron pipe: Ductile iron is based on the cast iron to change some of the characteristics of the structure of iron, so that it has become a lot of toughness, than the cast iron pipe is too brittle shortcomings much better, the tensile strength of the pipe bending strength greatly improved. The sealing material used in the socket interface is rubber ring.

Q:Can ductile iron pipe be used for pressure sewer systems?: Yes, ductile iron pipe can be used for pressure sewer systems.

Q:How do ductile iron pipes handle differential settlement?: Ductile iron pipes possess exceptional durability and are renowned for their ability to endure diverse environmental conditions, including differential settlement. Differential settlement refers to the uneven settling of the ground, which can often impose stress and strain on underground pipes. Specifically engineered to address settlement issues, ductile iron pipes exhibit inherent flexibility and strength. These pipes possess the capacity to flex and accommodate slight ground movements without incurring significant damage or failure. The flexibility of ductile iron pipes enables them to evenly distribute the stress and strain caused by differential settlement along their length. This characteristic assists in averting concentrated stress points that could potentially result in cracks or fractures in the pipe. Furthermore, the inherent strength of ductile iron pipes equips them with the necessary resistance to withstand the forces generated by differential settlement. The pipes' robust construction and high tensile strength render them less susceptible to deformation or damage caused by ground movements. Moreover, ductile iron pipes are commonly installed with flexible joints, such as rubber gaskets or push-on joints. These joints permit some movement and adapt to any slight misalignment or settlement that may occur. By providing flexibility at the joints, the pipes can better adjust to changes in ground conditions and diminish the risk of failure. In conclusion, ductile iron pipes possess the necessary attributes to effectively cope with differential settlement due to their flexibility, strength, and utilization of flexible joints. These features guarantee that the pipes can endure ground movements and continue to function efficiently without compromising their integrity or longevity.

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