DUCTILE IRON PIPE C Class DN250
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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 pipes be used for offshore oil and gas installations?
- Offshore oil and gas installations can utilize ductile iron pipes. Ductile iron, a cast iron variant, possesses exceptional strength and durability, rendering it suitable for diverse applications, including offshore environments. These pipes exhibit high tensile strength and corrosion resistance, making them ideal for transporting oil and gas amidst harsh offshore conditions. In subsea pipelines, risers, and flowlines, ductile iron pipes are frequently employed due to their capacity to endure high pressures and withstand external forces like waves, currents, and impacts. Moreover, they can handle the elevated temperatures and pressures associated with offshore oil and gas production. Furthermore, ductile iron pipes boast a lengthy service life and require minimal maintenance, thereby reducing overall operating costs for offshore installations. They are also readily available and cost-effective when compared to alternative materials such as steel. Nevertheless, it is crucial to consider project-specific requirements, environmental conditions, and the compatibility of ductile iron with other materials utilized in the offshore installation. Proper engineering analysis and design considerations are necessary to ensure the suitability and safety of ductile iron pipes for offshore oil and gas installations.
- Q: Are ductile iron pipes resistant to soil movement?
- Yes, ductile iron pipes are generally resistant to soil movement due to their high tensile strength and flexibility. They can withstand ground settlement, soil shifting, and other forms of soil movement without experiencing significant damage or failure.
- Q: What is cast iron pipe?
- According to its manufacturing methods can be divided into: sand, centrifugal pipe, straight pipe, continuous cast iron pipe and sand pipe.According to the material used, it can be divided into gray iron pipe, nodular cast iron pipe and high silicon iron pipe.
- Q: Can ductile iron pipes be repaired if they are damaged?
- Yes, ductile iron pipes can be repaired if they are damaged. The extent of the damage will determine the type of repair that is needed. In cases where the pipe is cracked or has small holes, a repair clamp or a stainless-steel sleeve can be used to seal the damaged area. These methods provide a temporary fix and allow for the flow of water to continue until a more permanent repair can be made. For more severe damage, such as large cracks or broken sections, a full replacement may be necessary. This involves cutting out the damaged section of the pipe and installing a new piece. This process requires specialized equipment and expertise, but it can effectively restore the functionality of the pipe. It is important to note that the repair of ductile iron pipes should be carried out by trained professionals who have experience in working with this type of material. This ensures that the repairs are done correctly and do not compromise the integrity and safety of the pipeline system. Regular inspection and maintenance of ductile iron pipes can help identify any potential issues early on and prevent extensive damage that may require replacement rather than repair.
- Q: How are ductile iron pipes restrained against axial thrust forces?
- Ductile iron pipes are typically restrained against axial thrust forces through the use of various mechanical joint systems. These joints, such as the push-on joint or the restrained joint, provide a secure connection between the pipes, preventing movement and ensuring structural integrity. Additionally, methods like concrete thrust blocks or anchor blocks are often used to further restrain the pipes and counteract any axial thrust forces that may be exerted on them.
- Q: Fire water supply network adopts ductile iron pipe, the test pressure should be no more than MPa
- Strictly speaking: the outer pipe network and the internal pipe network are the same. Minimum fire 1.0MPa, minimum sprinkler 1.4MPa. Because not only in accordance with the water pump, but also take into account the pressure on the fire engine.
- Q: How do ductile iron pipes handle water hammer in high-rise buildings?
- Known for their durability and strength, ductile iron pipes are an excellent option for managing water hammer in high-rise structures. Water hammer, a common occurrence when water flow abruptly halts or changes direction in pipes, causes pressure surges that can strain and potentially harm the pipes. Engineered to withstand high-pressure scenarios, ductile iron pipes exhibit remarkable resistance to water hammer. With their high tensile strength, these pipes can endure sudden pressure changes without warping or fracturing. This feature is especially crucial in high-rise constructions where water distribution must accommodate various floor pressures. Furthermore, the outstanding corrosion resistance of ductile iron pipes bolsters their ability to handle water hammer. Over time, corrosion weakens pipes, making them more prone to failure during pressure surges. However, the corrosion resistance of ductile iron pipes guarantees their structural integrity even in high-pressure circumstances. Moreover, the flexibility of ductile iron pipes enables them to absorb and dissipate the energy generated by water hammer. Consequently, the overall system experiences minimal impact, reducing the potential for damage. Absorbing energy also contributes to minimizing noise and vibrations associated with water hammer, thus enhancing the efficiency and comfort of the water supply system. To summarize, ductile iron pipes are well-suited to manage water hammer in high-rise buildings. Their strength, corrosion resistance, and flexibility make them a reliable choice for delivering water under varying pressures while upholding the system's integrity.
- Q: How can the internal and external walls of ductile iron pipes be protected from corrosion?
- Internal walls can be painted anti-corrosion paint, exterior anti-corrosion can choose to paint, but also useful anti-corrosion tape, or do 3PE anti-corrosion, look at your anti-corrosion requirements, cost budget and other construction objective conditions.
- Q: What is the expected deflection limit of ductile iron pipes?
- Several factors, including pipe diameter, wall thickness, and soil conditions, determine the expected deflection limit of ductile iron pipes. According to industry standards, it is recommended that ductile iron pipes used for underground installations should not exceed a deflection limit of 2%. In other words, the maximum allowable deflection would be 2% of the pipe's diameter. It is important to be aware that surpassing the deflection limit can result in various issues, such as reduced flow capacity, higher chances of pipe failure, and compromised structural integrity. Therefore, it is crucial to carefully consider and adhere to the suggested deflection limits when designing and installing ductile iron pipes to ensure their long-term performance and reliability.
- Q: Which direction should the spigot of the K9 ductile iron pipe be installed?
- Ductile iron pipes mainly called centrifugal ductile iron pipe, it has the properties of nature, iron and steel, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc.. Water supply pipe is the first choice, with high cost performance.
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DUCTILE IRON PIPE C Class DN250
- Ref Price:
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- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
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