DUCTILE IRON PIPE C Class DN80

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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:Is there a kind of pipe called lined ductile iron pipe? Seeking manufacturers?: Yes, ductile pipe is divided into two kinds, one is the ductile cast iron pipe pipe socket (socket ductile pipe), which is mainly used for water supply system, namely the fire water, because of ductile iron pipe with pressure, 10kg, 12kg, 16kg. Pressure small price, a few cheaper, because pure in the production process of different, 1. sand mill 2. metal water cooling, like water, the basic is 16kg.

Q:What's the function of the cement mortar lining of ductile iron pipes?: You may easily say that this statement is vague and there is no evidence that other manufacturers often do so when promoting other types of lining. However, in order to prove the truth of the above view, we have compiled sufficient examples to demonstrate the reliability of each of these statements from a scientific and logical point of view.We have stated each of these fields and other embedded systems as specious statements. There is only a reasonable conclusion that the cement mortar lining (CML) provides excellent protection for ductile iron pipes and steel tubes.Ductile iron pipe and steel pipe CML CML produces a synergistic effect of the incomparable.

Q:What are the environmental benefits of using ductile iron pipe?: Using ductile iron pipe in various applications brings numerous environmental benefits. Firstly, ductile iron is an incredibly durable material that can endure harsh environmental conditions and has a long lifespan. As a result, the need for frequent pipe replacements is significantly reduced compared to other materials, leading to a decrease in resource-intensive manufacturing processes and the disposal of old pipes. Secondly, ductile iron pipes possess exceptional corrosion resistance properties, which lowers the risk of leaks and pipe failures. This not only prevents potential water contamination but also minimizes water wastage. Furthermore, ductile iron is a recyclable material. When the pipes reach the end of their useful life, they can be melted down and used to create new products. This reduces the demand for virgin materials and conserves natural resources. Moreover, the manufacturing process of ductile iron pipes has greatly improved over time, resulting in reduced energy consumption and emissions. Many manufacturers now utilize energy-efficient technologies and practices, contributing to a lower carbon footprint and decreased air pollution. Lastly, ductile iron pipes have a smooth internal surface that minimizes friction and allows for efficient water flow. This leads to energy savings in pumping and distribution systems, as less energy is required to transport water through the pipeline network. Overall, the utilization of ductile iron pipe positively impacts the environment by reducing waste, conserving resources, minimizing pollution, and enhancing energy efficiency in water distribution systems.

Q:What is the expected joint deflection capability of ductile iron pipes?: Several factors can affect the expected joint deflection capability of ductile iron pipes. Generally, ductile iron pipes have a higher joint deflection capability compared to other pipe types. The joint deflection capability refers to how well a pipe joint can handle angular deflection or misalignment during installation or due to ground movement. Ductile iron pipes are known for their flexibility, which allows them to withstand external forces and movements without compromising their structural integrity. The expected joint deflection capability of ductile iron pipes typically falls within a range of 1 to 5 degrees, depending on the pipe diameter and wall thickness. This means that the pipes can safely accommodate angular deflection within this range without experiencing leaks or failures. It's important to consider that the joint deflection capability can also be influenced by factors like the type and quality of the joint restraint system, soil conditions, installation techniques, and pipe alignment. To ensure optimal joint deflection capability, it is crucial to follow proper installation practices and adhere to the guidelines provided by the manufacturer. All in all, ductile iron pipes have been designed and manufactured with a significant joint deflection capability, making them suitable for a wide variety of applications, including water distribution, sewer systems, and industrial piping networks.

Q:What is the purpose of ductile iron pipes?: Ductile iron pipes serve the crucial function of establishing a dependable and sturdy infrastructure for fluid transportation, including water, sewage, and gas. In comparison to steel or PVC pipes, ductile iron pipes offer notable advantages. One primary objective lies in ensuring the secure and efficient distribution of water to communities. Ductile iron pipes are specifically designed to endure high pressures and endure the challenging conditions found underground, rendering them an excellent choice for water supply systems. With their extended lifespan and minimal maintenance requirements, the necessity for frequent repairs or replacements is greatly reduced. Another purpose involves the efficient conveyance of sewage and wastewater. Ductile iron pipes possess exceptional resistance to corrosion, guaranteeing their ability to withstand the corrosive properties of sewage and other waste materials. Additionally, their structural strength enables them to endure heavy loads and ground movements, making them well-suited for underground sewer systems. Ductile iron pipes are also employed for gas transportation. Their remarkable mechanical properties empower them to withstand applications involving high pressures, making them the ideal choice for gas distribution networks. Furthermore, their durability and resistance to external factors like soil movement or temperature changes establish them as a reliable option for gas transmission systems. In essence, the overarching purpose of ductile iron pipes is to provide a resilient and enduring solution for the safe and efficient transportation of fluids. By contributing to the development and maintenance of essential infrastructure systems, they effectively support the needs of our communities.

Q:What are the typical joint restraint requirements for ductile iron pipes in seismic zones?: Ductile iron pipes in seismic zones require joint restraints to guarantee structural integrity and prevent displacement or separation during seismic events. These requirements are essential for maintaining the functionality and reliability of the pipeline system. In seismic zones, one common joint restraint requirement for ductile iron pipes is the utilization of flexible or mechanical joint systems. Flexible joints, like rubber gasket joints, are capable of absorbing and accommodating seismic movement. These joints allow for axial movement, angular deflection, and pipe expansion/contraction, thereby reducing the likelihood of pipe failure or damage. Another crucial requirement involves employing adequate anchoring systems to secure the pipes to surrounding structures or embed them in concrete thrust blocks. This prevents excessive movement or displacement during seismic events. Anchoring systems help distribute earthquake forces and minimize the risk of pipe separation or breakage. Moreover, seismic design standards often necessitate the use of seismic restraints, such as seismic joint restraints or bracing systems, to further enhance the stability and integrity of ductile iron pipes. These restraints restrict pipe movement in specific directions, thereby reducing potential damage and preserving overall system performance. It is important to acknowledge that specific joint restraint requirements for ductile iron pipes in seismic zones may vary based on local building codes, seismic activity levels, and engineering considerations. To ensure compliance with necessary seismic resistance requirements, it is crucial to consult relevant regulations and work with experienced professionals during the design and installation process.

Q:Are ductile iron pipes suitable for water distribution networks?: Ductile iron pipes are a suitable choice for water distribution networks. They have been widely used in water distribution systems for many years, thanks to their numerous advantages. To begin with, ductile iron pipes possess excellent durability and a long lifespan. Their resistance to corrosion is crucial for water pipes since they are continuously exposed to various chemicals and substances in the water. This corrosion resistance ensures that the pipes maintain their structural integrity over time, reducing the frequency of repairs or replacements. Furthermore, ductile iron pipes have a high strength and can withstand high pressure, making them ideal for water distribution networks. They can handle heavy loads and resist external forces such as soil movement or traffic loads, guaranteeing the safety and reliability of the water supply. Moreover, ductile iron pipes exhibit excellent hydraulic properties. With their smooth internal surfaces, they minimize friction and pressure drop, enabling the efficient flow of water through the system. This aids in conserving energy and reducing pumping costs, making ductile iron pipes a cost-effective choice for water distribution networks. Additionally, ductile iron pipes are versatile and can be easily installed in various soil conditions. They can endure ground movement and settle without breaking, which is crucial for maintaining a stable water distribution system. In conclusion, ductile iron pipes are highly suitable for water distribution networks due to their durability, resistance to corrosion, high strength, excellent hydraulic properties, and versatility in installation. They offer a reliable and efficient solution for delivering safe and clean water to communities.

Q:Deep well spiral iron pipe, or ductile iron tube?: Ductile iron pipe is a kind of cast iron pipe. In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the cast iron pipes, ductile iron pipes and finished product libraries can be better improved, with the nature of iron and the properties of steel. Ductile cast iron pipe after annealing, the microstructure is ferrite and pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..

Q:Is the water cast iron pipe 100% for hydrostatic test?: After the site installation, according to the standard to test pressure, but a lot of construction units are not pressure test

Q:How are ductile iron pipes protected during transportation and storage?: Ductile iron pipes are typically protected during transportation and storage through various methods. One common practice is to apply a coating of bituminous paint or epoxy on the exterior surface of the pipes to prevent corrosion. Additionally, the pipes are often wrapped with plastic or other protective material to shield them from physical damage and moisture. Proper handling and stacking techniques are also employed to minimize the risk of any deformation or cracking during transportation and storage.

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