DUCTILE IRON PIPES C Class DN550 System 1

DUCTILE IRON PIPES C Class DN550

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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:What new technologies are there for the installation of ductile iron pipes?: At present, the international general no faucet pipe hoop straight pipe and fittings (i.e. new flexible joint cast iron drainage pipes and fittings of the thesis), according to the interface type is divided into A type flexible interface (flange gland connection) and type W (flexible interface coupling connection) two, referred to as A type and W type.1.1 new flexible joint cast iron drainage pipe by centrifugal casting technology, has a compact structure, pipe wall thickness, the outer wall is smooth, no trachoma and slag, the tensile strength and compressive strength are high, products with stable chemical composition, corrosion resistance, fire retardant non-toxic, comply with fire safety requirements of environmental protection, no noise, no deformation, life. Long use.Type 1.2A: type A tube with high strength, low noise, good fireproof performance, long service life, with the advantages of flexibility and good seismic performance, but in the actual project that socket joints need larger installation space and the tube body is heavy, consumption of steel, especially in high-rise buildings it is difficult to accept by construction.

Q:What is the difference between ductile iron and cast iron pipes?: Ductile iron and cast iron pipes are both popular materials used in plumbing systems, but they have distinct differences in terms of composition, strength, and flexibility. 1. Composition: Ductile iron pipes are made from ductile iron, which is a type of cast iron that has been treated with trace amounts of magnesium to enhance its flexibility and strength. On the other hand, cast iron pipes are made from regular cast iron, which is more brittle and less malleable. 2. Strength: Ductile iron pipes are significantly stronger than cast iron pipes. Ductile iron has a higher tensile strength, meaning it can withstand higher levels of internal and external pressure. This makes it more suitable for applications where high strength is required, such as water mains or sewer lines. Cast iron pipes, on the other hand, are more prone to cracking or breaking under pressure. 3. Flexibility: Ductile iron pipes have greater flexibility compared to cast iron pipes. This flexibility allows them to withstand ground movement, making them less susceptible to damage or breakage caused by settling or shifting soil. Cast iron pipes, due to their inherent brittleness, are more likely to crack or separate when exposed to ground movement or vibrations. 4. Installation: Ductile iron pipes are typically joined using a mechanical joint or flanged joint, which provides a secure and leak-proof connection. On the other hand, cast iron pipes are usually joined using a bell-and-spigot joint, which relies on gaskets or lead caulking to create a seal. The mechanical joint used in ductile iron pipes offers better resistance to movement and external forces. 5. Cost: Ductile iron pipes are generally more expensive than cast iron pipes. The additional treatment process and higher strength of ductile iron contribute to the increased cost. However, the added durability and longer lifespan of ductile iron pipes can offset the initial investment, as they may require fewer repairs or replacements over time. In summary, the main differences between ductile iron and cast iron pipes lie in their composition, strength, flexibility, installation methods, and cost. Ductile iron pipes offer superior strength and flexibility, making them more suitable for demanding applications, while cast iron pipes are more brittle and prone to breakage. Ultimately, the choice between the two depends on the specific requirements of the plumbing system and the available budget.

Q:Can ductile iron pipes be used for underground sewage systems?: Underground sewage systems can utilize ductile iron pipes, which offer numerous advantages. Ductile iron is a form of cast iron that possesses improved flexibility and strength, making it suitable for a variety of applications, including sewage systems. The first advantage of ductile iron pipes for underground sewage systems is their exceptional resistance to corrosion. This is particularly important in sewage systems where moisture and chemicals can contribute to corrosion over time. By resisting corrosion, these pipes ensure long-term durability and reliability. Additionally, ductile iron pipes possess high tensile strength, enabling them to withstand the pressure and stress that occur in underground sewage systems. They are also capable of withstanding ground movements, such as soil settling or shifting, which can cause damage to pipes made from other materials. Moreover, ductile iron pipes have a smooth internal surface, resulting in improved flow capacity and reducing the likelihood of clogging or blockages in the sewage system. This smooth surface also minimizes the accumulation of debris and sediment, lessening the need for frequent maintenance and cleaning. Another significant aspect is that ductile iron pipes are available in various sizes and can be easily connected using a range of joint systems. This allows for flexibility when designing and constructing underground sewage systems. In conclusion, ductile iron pipes are an excellent choice for underground sewage systems due to their corrosion resistance, high tensile strength, smooth internal surface, and ease of installation.

Q:How does ductile iron pipe perform in extreme temperatures?: Ductile iron pipe is renowned for its exceptional performance in extreme temperatures, thanks to its unique composition and manufacturing process. Its structural integrity remains uncompromised, allowing it to endure both high and low temperatures without issue. When it comes to high temperatures, ductile iron pipe showcases remarkable heat resistance. It can withstand temperatures of up to 1000 degrees Fahrenheit, making it perfect for applications involving hot liquids or gases, such as steam pipelines or industrial processes. Its strength and thermal stability enable it to maintain its shape and structural integrity even under extreme heat conditions, guaranteeing long-term reliability and safety. Similarly, ductile iron pipe excels in low-temperature environments. It can brave sub-zero temperatures without becoming brittle or prone to cracking, a common problem with materials like cast iron. This makes ductile iron pipe an ideal choice for applications in cold climates, such as water distribution systems in freezing temperatures. Moreover, the ability of ductile iron pipe to resist thermal expansion and contraction is another advantage in extreme temperatures. It has a low coefficient of thermal expansion, meaning it expands and contracts less compared to other materials. This property minimizes stress on the pipe, reducing the risk of leaks or failures caused by temperature fluctuations. In conclusion, ductile iron pipe demonstrates outstanding performance in extreme temperatures. Its heat resistance, ability to withstand low temperatures, and resistance to thermal expansion and contraction make it a reliable option for various applications, ensuring safe and efficient operations even in challenging environments.

Q:Are ductile iron pipes compatible with other pipe materials?: Generally, other pipe materials can be compatible with ductile iron pipes. The high level of flexibility and strength of ductile iron pipes allows for their connection with various materials like PVC, HDPE, and steel. Transition fittings are often utilized to securely and prevent leaks when connecting ductile iron pipes with other materials. To maintain the integrity of the pipeline system and ensure compatibility, it is crucial to follow industry standards and guidelines when joining different pipe materials.

Q:What is the maximum temperature that ductile iron pipes can handle?: Ductile iron pipes can handle temperatures up to a maximum of around 1000 degrees Fahrenheit (538 degrees Celsius).

Q:Are ductile iron pipes suitable for fire protection systems?: Ductile iron pipes are a perfect choice for fire protection systems. Ductile iron, being a robust and durable material, can endure extreme pressure and temperature fluctuations, making it an ideal option for reliable and long-lasting pipes in fire protection systems. Moreover, ductile iron demonstrates exceptional resistance to corrosion, preventing any deterioration of the pipes and ensuring the integrity of the fire protection system over time. Additionally, the high tensile strength of ductile iron provides added safety advantages, as it can withstand the stress and strain that may arise during a fire incident. Consequently, ductile iron pipes are extensively utilized in fire protection systems across various applications, including commercial buildings, industrial facilities, and residential areas.

Q:Are ductile iron pipes suitable for horizontal directional drilling?: Yes, ductile iron pipes are suitable for horizontal directional drilling due to their high strength and flexibility, which allows them to withstand the stress and bending forces during the drilling process.

Q:Are ductile iron pipes suitable for water distribution networks?: Yes, ductile iron pipes are highly suitable for water distribution networks. They possess excellent strength, durability, and corrosion resistance, making them ideal for carrying and delivering water over long distances. Additionally, their flexibility allows for easy installation and adaptability to various terrains, ensuring reliable and efficient water distribution.

Q:Which is good for water polo cast iron pipe steel pipe?: Flexible seamless steel pipe is good toughness, good processing, better than ductile iron corrosion resistance, the price is slightly higher;

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