DUCTILE IRON PIPES K8 DN1400

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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:Does the cast iron pipe need separate corrosion protection?: No, the inner and outer corrosion protection of the tube has been done.

Q:What is ductile iron?: Ductile iron is a type of cast iron that has been treated with magnesium or cerium to improve its mechanical properties. It is called "ductile" because it has a higher degree of ductility compared to other types of cast iron. Ductility refers to the ability of a material to be stretched or deformed without breaking. This characteristic makes ductile iron highly suitable for applications that require high strength and resistance to wear and tear, such as pipes, automotive components, and machinery parts. The addition of magnesium or cerium to the iron during the manufacturing process helps to form graphite in the structure, which gives ductile iron its unique properties. This graphite formation also helps to make the iron more flexible and less brittle, enabling it to absorb shock and vibration without fracturing. Overall, ductile iron offers a balance between the strength of cast iron and the flexibility of steel, making it a versatile material for various industrial applications.

Q:Ductile iron pipe converter, steel transition DN100 turn 100, what is the specific accessories name? Can you supply photos?: Plastic steel conversion parts performance description: long name high density polyethylene is mainly used for buried water supply and gas transmission pipeline links, can effectively and closely linked pipe port, quality assurance, reasonable price and price.

Q:How do ductile iron pipes handle water hammer?: Ductile iron pipes possess excellent resistance to water hammer, which is the sudden increase in pressure and velocity of water flow in a pipe system. This occurrence happens when there is an abrupt change in water velocity, like the sudden closure of a valve or the immediate shutdown of a pump. The design of ductile iron pipes enables them to withstand high-pressure surges caused by water hammer. Their increased strength and flexibility allow them to absorb and dissipate the energy generated during these pressure surges. The material's ductility permits the pipe to undergo slight deformation when impacted by water hammer, preventing the pipe from rupturing or breaking. Moreover, ductile iron pipes possess inherent damping properties that make them more effective at absorbing and dissipating the energy of water hammer compared to other pipe materials. This aids in reducing the intensity and duration of pressure surges, thereby minimizing potential damage to the pipe system and its components. Furthermore, ductile iron pipes often come equipped with various fittings and accessories that further enhance their capability to handle water hammer. These include specialized joint designs like restrained joints or flexible couplings, which provide additional flexibility and resistance to pressure surges. In summary, ductile iron pipes are specifically engineered to address the challenges presented by water hammer. Their strength, flexibility, damping properties, and specialized fittings make them an ideal choice for applications where water hammer is a concern, offering a reliable and durable solution for water distribution systems.

Q:General cast iron prices now: Hello friends, Tianjin is in Shandong Qingdao 6500 7300 yuan / ton to 7100 yuan a ton of Zhejiang 7500 to 9000 yuan a ton, this is a great relationship, and the production of raw materials, for reference only, we are ductile casting manufacturers, the information can not say 100% accurate but can reference.

Q:What are the different pressure classes available for ductile iron pipes?: Ductile iron pipes come in various pressure classes that are commonly used for water and wastewater purposes. These pressure classes, namely Class 150, Class 200, Class 250, Class 300, and Class 350, indicate the maximum pressure in psi that the pipes can withstand. For instance, Class 150 pipes have a maximum working pressure of 150 psi, while Class 200 pipes can handle up to 200 psi. Class 250 pipes can withstand pressures up to 250 psi, and Class 300 pipes have a maximum working pressure of 300 psi. Lastly, the highest pressure class, Class 350, can handle pressures up to 350 psi. The selection of the appropriate pressure class for a ductile iron pipe depends on several factors, including system design, fluid characteristics, and operating conditions. To determine the suitable pressure class for a specific application, it is crucial to consult relevant standards and guidelines, such as those provided by the American Water Works Association (AWWA). It is important to note that these pressure classes refer to the working pressure of the pipe, which is the pressure the pipe is designed to safely contain during normal operation. To ensure compliance with the required pressure class standards, the pipes are typically tested and certified.

Q:Can ductile iron pipes be used in earthquake-prone areas?: Yes, ductile iron pipes can be used in earthquake-prone areas. Ductile iron is a strong and flexible material that can withstand the ground movement and vibrations caused by earthquakes. It has excellent ductility, meaning it can deform without fracturing or breaking under stress. This property allows ductile iron pipes to absorb the energy generated during an earthquake, reducing the risk of pipe failure or rupture. Additionally, ductile iron pipes have been successfully used in seismic zones for many years, proving their resilience and reliability in such areas. However, it is important to note that proper installation and design considerations, such as using appropriate jointing methods and ensuring proper anchoring, are essential for ensuring the performance of ductile iron pipes in earthquake-prone areas.

Q:How does ductile iron pipe perform in areas with high soil movement?: Ductile iron pipe possesses notable attributes of strength, durability, and flexibility, rendering it an optimal selection for locales with substantial soil movement. Differing from alternative piping materials, like PVC or concrete, ductile iron pipe demonstrates the capability to endure significant ground shifts without undergoing catastrophic failure. The inherent robustness of ductile iron pipe empowers it to withstand the external forces imposed by soil movement, encompassing settlement, lateral displacement, and ground heave. Its elevated tensile strength and capacity to endure bending stresses render it less prone to developing cracks, fractures, or leaks, thereby ensuring the pipeline system's integrity. Moreover, ductile iron pipe exhibits remarkable deflection capabilities, imparting the capacity to flex and accommodate ground movement without succumbing to breakage. This flexural aptitude enables the pipe to disseminate the stress engendered by soil movement along its length, thereby diminishing the concentration of forces at any specific juncture. In regions characterized by pronounced soil movement, ductile iron pipe also reaps the advantages of its corrosion resistance properties. Typically coated with a protective layer, such as cement-mortar lining or polyethylene encasement, the pipe serves as a barrier against corrosive elements found in the soil. This protective coating effectively mitigates damage and deterioration, ensuring the pipe's endurance and performance, even in demanding soil conditions. All in all, ductile iron pipe is highly recommended for locales with substantial soil movement due to its exceptional strength, flexibility, and corrosion resistance. Its ability to withstand ground shifts and distribute stress establishes it as a dependable choice for long-term performance, necessitating minimal maintenance.

Q:What are the different corrosion protection options for ductile iron pipe?: There are several corrosion protection options available for ductile iron pipe to ensure its longevity and durability. These options include: 1. Cement Mortar Lining: This involves coating the inner surface of the pipe with a layer of cement mortar, which acts as a barrier between the pipe and corrosive elements in the water or soil. Cement mortar lining provides excellent corrosion resistance and can last for several decades. 2. Polyethylene Encasement: This method involves wrapping the ductile iron pipe with a layer of polyethylene material. The polyethylene acts as a physical barrier, protecting the pipe from external corrosive elements. Polyethylene encasement is commonly used in aggressive soil conditions and can offer long-lasting protection. 3. Internal and External Coatings: Various types of coatings can be applied to the inner and outer surfaces of the ductile iron pipe to provide corrosion resistance. These coatings can be epoxy, polyurethane, or fusion-bonded epoxy (FBE) coatings. These coatings create a barrier between the pipe and the surrounding environment, preventing corrosion. 4. Cathodic Protection: This method involves using an electrical current to protect the pipe from corrosion. Cathodic protection systems can be either galvanic (sacrificial anode) or impressed current systems. These systems direct the flow of electrons to prevent the oxidation of the ductile iron pipe. 5. Zinc Coating: Zinc coating, also known as galvanizing, involves applying a layer of zinc to the surface of the ductile iron pipe. The zinc acts as a sacrificial anode, corroding instead of the iron pipe. Zinc coating provides effective corrosion protection, particularly in soil conditions with low resistivity. It's important to note that the choice of corrosion protection option for ductile iron pipes depends on various factors such as the environment, water chemistry, soil conditions, and expected service life. Consulting with corrosion protection specialists and engineers can help in selecting the most suitable option for specific applications.

Q:Are ductile iron pipes suitable for oil and gas pipeline applications?: Yes, ductile iron pipes are suitable for oil and gas pipeline applications. Ductile iron pipes have numerous properties that make them ideal for use in such applications. Firstly, ductile iron pipes have high tensile strength, which allows them to handle the high pressure and stress associated with oil and gas transmission. This ensures that the pipes can withstand the demanding conditions and maintain structural integrity over time. Secondly, ductile iron pipes are highly resistant to corrosion. Oil and gas pipelines are exposed to various corrosive elements, such as water, chemicals, and salts. Ductile iron pipes have a protective lining, typically made of cement mortar or polyethylene, which prevents corrosion and extends the lifespan of the pipes. Additionally, ductile iron pipes have excellent durability and longevity. They have a long service life, typically ranging from 50 to 100 years, depending on the specific conditions and maintenance practices. This makes them a reliable choice for oil and gas pipeline applications, reducing the need for frequent replacements and minimizing downtime. Furthermore, ductile iron pipes have good flexibility, allowing them to withstand ground movement and absorb shocks and vibrations. This flexibility is particularly important in oil and gas pipeline applications, where the pipes need to adapt to changing terrain and environmental conditions. Lastly, ductile iron pipes are cost-effective compared to other materials commonly used in oil and gas pipelines, such as steel. They offer a favorable balance between performance and price, making them a practical choice for both large-scale and small-scale pipeline projects. Overall, the combination of high tensile strength, corrosion resistance, durability, flexibility, and cost-effectiveness makes ductile iron pipes suitable for oil and gas pipeline applications.

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