DUCTILE IRON PIPES C Class DN400

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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 desalination plants?: Ductile iron pipes are the perfect fit for desalination plants. These plants typically need to move large amounts of water, and using ductile iron pipes has numerous advantages that make them an ideal choice for this purpose. To begin with, ductile iron pipes possess exceptional strength and durability, which are crucial for withstanding the high pressure and corrosive nature of desalinated water. They can easily handle the rapid flow rates and maintain their structural integrity over long distances, ensuring a dependable and efficient water transportation system. Furthermore, ductile iron pipes exhibit excellent resistance to corrosion, a key factor in desalination plants where the water often contains high levels of salt and other minerals. The corrosion-resistant properties of ductile iron pipes ensure that the water quality remains uncompromised and that the pipes have a long service life, ultimately reducing the costs associated with maintenance and replacement. Moreover, ductile iron pipes have a remarkable ability to withstand impacts, making them particularly valuable in desalination plants where pipelines may be exposed to external forces or accidental damage. By being able to endure such impacts, the risk of leaks is significantly reduced, ensuring a steady and uninterrupted supply of water. Additionally, compared to materials like stainless steel or PVC, ductile iron pipes are more cost-effective. They come with a lower initial cost and require less maintenance, making them the more economical choice for desalination plants. In conclusion, ductile iron pipes are undoubtedly the perfect fit for desalination plants due to their strength, durability, resistance to corrosion and impacts, as well as their cost-effectiveness. These pipes are well-equipped to meet the demanding requirements of desalination plants, providing a reliable and efficient water transportation system.

Q:Can ductile iron pipes be made into clear tubes?: Of course, you can also use as a pipe, but because of the appearance of cast iron pipe is not very beautiful, but relatively brittle, by external impact or bad insulation cold winter break, so according to your use of the environment to determine.

Q:Are ductile iron pipes suitable for horizontal directional drilling (HDD) installations?: Yes, ductile iron pipes are suitable for horizontal directional drilling (HDD) installations. They possess the necessary strength and flexibility to withstand the drilling process and can be easily installed underground without compromising their structural integrity.

Q:What are the different types of coatings available for ductile iron pipe?: Ductile iron pipe offers a range of coating options, each with its own unique properties and benefits. 1. One commonly used coating is cement mortar. It involves applying a layer of cement mortar to both the interior and exterior surfaces of the pipe. This coating protects against corrosion and abrasion, while also improving hydraulic efficiency. 2. Another popular choice is polyethylene encasement. This involves wrapping the pipe with a layer of polyethylene material. It provides excellent corrosion resistance, especially against soil and water contaminants. 3. Fusion-bonded epoxy (FBE) coating is applied by heating epoxy powder to create a strong bond with the pipe surface. It offers outstanding corrosion resistance and is commonly used in aggressive environments like wastewater treatment plants and chemical processing facilities. 4. Zinc coating, also known as galvanization, is applied by adding a layer of zinc to the pipe's surface. It provides excellent corrosion resistance and is often used in outdoor applications exposed to moisture and humidity. 5. Bituminous coating is a black, tar-like substance that protects against corrosion. It is commonly used in underground applications where the pipe is in contact with soil or water. 6. Polyurethane coatings are known for their resistance to abrasion, impact, and chemical corrosion. They are often used in aggressive environments such as oil and gas pipelines. These examples highlight the different coatings available for ductile iron pipe. The choice of coating depends on factors like the intended application, environmental conditions, and desired level of corrosion protection. It is crucial to consult industry experts and follow relevant standards and specifications when selecting a coating for ductile iron pipe.

Q:How does ductile iron pipe compare to steel pipe in terms of durability?: Ductile iron pipe and steel pipe both have their own unique characteristics, but in terms of durability, ductile iron pipe has several advantages over steel pipe. Firstly, ductile iron pipe is highly resistant to corrosion. It has a protective layer of zinc or cement lining that prevents rust and corrosion, making it more durable and less prone to leaks or failures. On the other hand, steel pipe is susceptible to corrosion, especially when exposed to moisture or certain chemicals. This can lead to structural issues and decrease its overall durability. Secondly, ductile iron pipe has excellent impact resistance. It can withstand heavy loads and external pressures without cracking or breaking. This makes it suitable for applications in areas with high traffic or where the pipe may be subject to accidental impacts. Steel pipe, although strong, can be more brittle and prone to fractures under similar conditions. Additionally, ductile iron pipe has a longer service life compared to steel pipe. It has been known to last for over 100 years with proper maintenance, making it a reliable and durable choice for infrastructure projects. Steel pipe, while still durable, may require more frequent inspections and maintenance to ensure its longevity. Overall, ductile iron pipe surpasses steel pipe in terms of durability due to its corrosion resistance, impact resistance, and longer service life. However, the choice between the two ultimately depends on the specific application, budget, and other project requirements.

Q:Do rigid cement cast iron pipes need cement piers?: 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. Compared with the PE pipe, from the installation time, ductile pipe PE pipe installation is simple and rapid, and after the installation of internal and external pressure bearing better tightness and corrosion resistance; from the point of view, ductile pipe sealing better after installation, but also can improve the corrosion resistance of corrosion protection through a variety of means; from the hydraulic performance, because ductile pipe specifications generally refers to the inner diameter of PE pipe diameter specifications generally refers to the same specifications, because under the condition of ductile pipe can achieve greater runoff; from the installation and maintenance cost, ductile pipe have more favorable price. The main components of ductile iron pipes are carbon, silicon, manganese, sulfur, phosphorus and magnesium. The inner wall of zinc spray, anti-corrosion materials such as cement mortar.

Q:Are ductile iron pipes resistant to UV degradation?: Ductile iron pipes are not inherently resistant to UV degradation. Exposure to ultraviolet (UV) radiation from the sun can cause the degradation of various materials, including ductile iron. However, it is important to note that the rate of UV degradation in ductile iron pipes is relatively slow compared to other materials such as plastics or rubber. To mitigate the effects of UV degradation on ductile iron pipes, protective measures can be taken. Coating the pipes with a suitable UV-resistant paint or applying an external protective layer can help minimize the impact of UV radiation. Additionally, proper installation and maintenance practices can also contribute to the longevity and durability of ductile iron pipes. It is worth mentioning that while UV degradation may not be the primary concern for ductile iron pipes, other factors such as corrosion, chemical attack, or mechanical stress can still affect their performance and lifespan. Therefore, it is important to consider all potential environmental factors and apply appropriate protective measures accordingly.

Q:What is the weight of ductile iron pipe compared to other pipe materials?: Ductile iron pipe is generally heavier compared to other pipe materials. Its weight can vary depending on the size and thickness of the pipe, but generally, ductile iron pipe is denser and has a higher weight per unit length compared to materials like PVC, HDPE, or steel. This higher weight of ductile iron pipe is primarily due to its composition, which includes iron and carbon, making it a sturdy and durable option for various piping applications.

Q:What's the difference between grey cast iron pipe and ductile iron pipe?: Ductile iron pipe is a kind of casting alloy developed in the late 1940s. It is a kind of spheroidal graphite cast iron which is added into the molten iron by adding inoculant and inoculant. The mechanical properties of spherical graphite, so much more better than that of grey cast iron, cast iron, close to the steel, but the price is lower than steel, and still has many excellent properties of ordinary cast iron, such as good casting, shock absorption, machinability and low notch sensitivity etc.. Therefore, many important mechanical parts, such as crankshaft, connecting rod, gear, valve body and cylinder liner, can be made of ductile iron to save steel and reduce cost.

Q:Can ductile iron pipe be used for wastewater treatment plant sludge dewatering?: Yes, ductile iron pipe can be used for wastewater treatment plant sludge dewatering. Ductile iron pipe is known for its durability and corrosion resistance, making it suitable for applications in wastewater treatment plants. It can effectively handle the sludge dewatering process and provide reliable performance for long-term use.

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