DUCTILE IRON PIPE K8 DN500

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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 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: Can ductile iron pipe be used for horizontal directional drilling?: Yes, ductile iron pipe can be used for horizontal directional drilling (HDD). HDD is a trenchless method of installing underground utilities, such as pipelines, without the need for traditional open-cut trenching methods. Ductile iron pipe is often used in HDD projects due to its strength, durability, and ability to withstand the stresses and strains associated with directional drilling. It has excellent resistance to external loads and can withstand the bending and pulling forces involved in HDD installations. However, it is important to consider factors such as pipe diameter, wall thickness, and soil conditions to ensure proper pipe selection for HDD projects. Additionally, proper installation techniques and precautions should be followed to ensure the long-term performance and integrity of the ductile iron pipe in HDD applications.

Q: What are the advantages of using ductile iron pipe over concrete pipe?: Using ductile iron pipe instead of concrete pipe offers several advantages. To begin with, ductile iron pipe has a higher strength-to-weight ratio, making it capable of withstanding higher pressure and loads while being lighter. This makes it easier to handle and install, ultimately reducing labor costs and saving time. Additionally, ductile iron pipe has superior corrosion resistance, making it less susceptible to rust or degradation over time. This extends its lifespan and reduces the need for frequent repairs or replacements, making it a more cost-effective option in the long run. Moreover, ductile iron pipe is more flexible and resilient compared to concrete pipe. It can withstand ground movement, settling, and other environmental factors without cracking or breaking. This reduces maintenance and repair costs, ensuring its durability. Furthermore, ductile iron pipe has a smoother interior surface, resulting in improved flow characteristics and reduced friction. This allows for more efficient transportation of fluids and minimizes the risk of clogs or blockages, guaranteeing uninterrupted flow. Lastly, ductile iron pipe is highly versatile and suitable for a wide range of applications. It can be used for both above-ground and underground installations, making it ideal for various infrastructure projects such as water supply systems, wastewater treatment plants, and industrial applications. In conclusion, the advantages of using ductile iron pipe over concrete pipe include its higher strength-to-weight ratio, superior corrosion resistance, better flexibility and resilience, smoother interior surface, and versatility. These benefits make it a reliable and cost-effective choice for various infrastructure projects.

Q: The benefits of ductile iron castings: Nodular cast iron, is a kind of high strength cast iron material developed in 50s twentieth Century, its comprehensive performance is close to the steel, it is based on its excellent performance, has been successfully used in casting complex stress, strength, toughness and wear resistance requirements of the higher parts.

Q: Can ductile iron pipe be used for underground storage tank systems?: Certainly, underground storage tank systems can utilize ductile iron pipe. Renowned for its robustness and potency, ductile iron pipe proves itself adaptable for diverse purposes, including underground storage tanks. Its exceptional tensile strength and immunity to corrosion render it a superb selection for confining and conveying liquids or gases in subterranean settings. Furthermore, ductile iron pipe exhibits remarkable resistance to external pressures and endures substantial burdens, establishing it as a dependable choice for underground storage tank systems.

Q: What are the different pressure classes available for ductile iron pipes?: The different pressure classes available for ductile iron pipes typically range from Class 150 to Class 350.

Q: What is the typical weight of ductile iron pipe?: The weight of ductile iron pipe can differ based on its diameter and wall thickness. In general, a 6-inch diameter ductile iron pipe with a wall thickness of 0.25 inches may weigh about 35 pounds per linear foot. Likewise, a 12-inch diameter ductile iron pipe with a wall thickness of 0.375 inches could weigh roughly 115 pounds per linear foot. It should be emphasized that these weight approximations are rough and may slightly differ depending on the manufacturer and product specifications.

Q: How much is the working pressure of ductile iron pipe used in water supply pipe and how is MPa determined?: Upstairs are positive solutions, but now outdoor buried water pipes are using steel wire mesh skeleton, plastic composite pipe instead of ductile iron pipeThe general pressure grades used for water supply pipes are 1.0MPa and 1.6Mpa

Q: How do ductile iron pipes handle concentrated loads?: Ductile iron pipes are specifically designed to handle concentrated loads effectively. Due to their unique composition and manufacturing process, they possess excellent strength and durability, making them highly resistant to cracking or breaking under heavy loads. One of the key characteristics of ductile iron pipes is their high tensile strength, which enables them to withstand concentrated loads without deformation. The pipes are made by adding small amounts of magnesium to cast iron during the production process, which transforms the brittle graphite flakes into nodular graphite. This modification significantly enhances the material's strength and ductility, allowing it to handle concentrated loads more effectively. Additionally, ductile iron pipes have a high modulus of elasticity, meaning they can deform elastically under a load and then return to their original shape once the load is removed. This property enables the pipes to distribute the concentrated load evenly along their entire length, minimizing stress concentrations and reducing the risk of fractures or failures. Furthermore, ductile iron pipes have a thick, robust wall thickness, providing them with exceptional structural integrity. This thickness allows the pipes to bear significant loads and withstand pressure variations without compromising their overall performance. In summary, ductile iron pipes are specifically engineered to handle concentrated loads due to their high tensile strength, elastic deformation capabilities, and thick wall thickness. These characteristics make them a reliable choice for various applications, including water and wastewater systems, as they can withstand significant external forces without compromising their structural integrity.