DUCTILE IRON PIPES AND PIPE FITTINGS K8CLASS DN200

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 22 pc

Supply Capability:: 3000 pc/month

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Material : Ductile Cast Iron
Size Range : DN 80mm to DN 2000mm
Unit Effective Length : 6m or 5.7m
Manufacture Standard: ISO 2531:1998/ EN 545:2006/EN 598:2007
Annual capacity : 200,000 tons
Coating Exterior: Zinc 130g/m2 according to ISO 8179-1 and bitumen coating 70 microns.
Cement Interior: Portland Cement/ High Alumina Cement/ Sulphate Resisting Cement Lining according to ISO 4179
Special requirements on external coating and internal lining can be applied
We also provide accessories such as SBR/EPDM rubber gaskets, lubricant paste, pipe caps, PE sleeves, etc.

Additional Parts:

Each pipe is strictly inspected according to related standard to ensure permanently high performance.
Easy Installation at site and service free for life
Long Service Lifespan
Quotation will arrive you within 24hours once we get your inquiry.
We guarantee offering you a competitive price.
A copy of original inspection reports of pipes will be offered after shipment.
Photos of loading process will be sent to the customer after shipment effect.
We will follow-up the delivery progress after shipment effect and update to the customer on weekly basis.

Q: QT400-10 nodular cast iron requires hardness of HRC47~51. Why can't quench hardness be reached?: QT400-10 shall ensure sufficient pearlite in the casting state, at least half of the pearlite. This is done with the temperature, time, and water. But if it is big, the heart hardness will not go up.

Q: Are ductile iron pipes suitable for pressure reducing valve stations?: Ductile iron pipes prove to be suitable for pressure reducing valve stations due to their strength and durability, making them an ideal choice for applications involving high pressure. Pressure reducing valve stations, which regulate and decrease the pressure of a fluid or gas in a pipeline system, can rely on ductile iron pipes to handle the exerted pressure, ensuring an efficient and reliable operation. Moreover, the excellent resistance to corrosion exhibited by ductile iron pipes is crucial in upholding the integrity of the pipeline system, thereby preventing leaks or failures. Overall, the necessary strength, durability, and corrosion resistance required for pressure reducing valve stations are provided by ductile iron pipes.

Q: How do ductile iron pipes handle thermal expansion and contraction?: The exceptional ability of ductile iron pipes to handle thermal expansion and contraction is well-known. This ability stems from their distinctive composition and design, which enable them to endure temperature fluctuations without sustaining significant harm or deformation. Thermal expansion arises when a material expands as a result of increased temperature, while thermal contraction refers to the contraction that occurs when a material cools down. Ductile iron pipes effectively accommodate these temperature changes by utilizing their inherent flexibility and strength. A key factor that enables ductile iron pipes to manage thermal expansion and contraction is their high ductility, which refers to their capacity to deform without breaking. This ductility allows the pipes to absorb the forces of expansion and contraction without developing cracks or ruptures. Additionally, the composition of ductile iron pipes includes graphite nodules, which act as microcracks that can absorb stress and prevent material fracturing. This unique microstructure enhances the pipes' resistance to thermal expansion and contraction. Furthermore, ductile iron pipes are often designed with joints that allow for limited movement. These joints, such as mechanical joints or push-on joints, can accommodate pipe expansion and contraction by offering a certain level of flexibility. This helps prevent the pipes from being excessively stressed or damaged. In conclusion, ductile iron pipes are specifically engineered to effectively handle thermal expansion and contraction. Their high ductility, unique microstructure, and joint design make them a robust and dependable choice for applications where temperature variations are expected.

Q: Can ductile iron pipes be used for irrigation of sports fields?: Yes, ductile iron pipes can be used for irrigation of sports fields. Ductile iron pipes are known for their strength, durability, and flexibility, making them an ideal choice for various applications, including irrigation. These pipes have high resistance to external pressures and impact, which is beneficial for sports fields that may experience heavy foot traffic and potential damage. Additionally, ductile iron pipes have excellent corrosion resistance, ensuring long-term performance and minimal maintenance. Their smooth interior surface also allows for efficient water flow, preventing clogs and ensuring adequate irrigation for the sports fields. Overall, ductile iron pipes are a reliable and suitable option for irrigation systems in sports fields.

Q: What is the expected joint restraint method for ductile iron pipes?: Typically, when it comes to joint restraint methods for ductile iron pipes, the two commonly used options are mechanical joints or push-on joints. Both of these joint types are reliable and prevent leaks, ensuring the stability and integrity of the pipeline system. Mechanical joints involve the use of rubber gaskets and bolts to tightly seal the joints, while push-on joints rely on a groove and rubber gasket system to create a watertight seal. Both methods have excellent joint restraint capabilities and allow for the smooth transmission of fluids or gases through the pipeline without any risk of joint separation or failure. Moreover, these joint restraint methods also make installation and maintenance easier, which is why they are often preferred for ductile iron pipe systems.

Q: Do ductile iron pipes require concrete encasement for support?: Yes, ductile iron pipes typically require concrete encasement for support. Concrete encasement provides additional stability and strength to the pipes, preventing them from shifting or collapsing under pressure. It helps distribute the load evenly along the length of the pipe and protects it from external forces such as soil movement or heavy vehicle traffic. Concrete encasement also helps to minimize the risk of damage due to corrosion or external impacts, ensuring the longevity and durability of the ductile iron pipes.

Q: What is a slide in type T flexible interface?: The disadvantage of the T type interface is the ability to prevent pipe slippage because the interface can not withstand axial forces, so the base of the line is positioned against the axial forceFigure slider type (type T) interface (TYT type)The T type interface utilizes the self sealing action of the rubber ring to preserve the tightness of the water, as shown in the following figure. The so-called self sealing action is that the rubber ring is subjected to fluid pressureFig. interface rubber sealWhen the actual contact pressure to form a rubber ring is equal to the contact pressure and the fluid pressure generated by the installation of pre compression on the rubber ring and the new contact pressure. Due to the contact pressure than the fluid pressure, so the interface has good sealing function.

Q: The difference between ductile iron pipe and steel pipe used in pipe jacking: The casting processes of nodular cast iron pipes are continuous casting, hot die casting and water-cooled centrifugal casting, in which water cooling is the most advanced process in the world,

Q: Can ductile iron pipe be used for hydroelectric power generation?: Hydroelectric power generation is made possible with the use of ductile iron pipes. Ductile iron, a type of cast iron known for its strength, durability, and resistance to corrosion, is well-suited for a range of applications, including the construction of hydroelectric power generation systems. One specific application of ductile iron pipes in hydroelectric power plants is for water conveyance. These pipes, commonly referred to as penstocks, play a vital role in transporting water from the reservoir to the turbines. Given the high pressure and flow rates involved, ductile iron pipes are capable of withstanding these demanding conditions. Moreover, the resistance of ductile iron pipes to corrosion is particularly essential in hydroelectric power generation. The water used in this process can be highly corrosive due to its composition and the presence of impurities. By utilizing ductile iron pipes, the system remains sturdy and durable over time, resulting in reduced maintenance and replacement expenses. Furthermore, the versatility of ductile iron pipes allows for easy joining using different methods such as flanged, mechanical, or push-on joints. This facilitates efficient and reliable installation, ensuring the integrity of the water conveyance system in hydroelectric power plants. In conclusion, ductile iron pipe is a suitable choice for hydroelectric power generation due to its strength, durability, corrosion resistance, and ease of installation. Its utilization in penstocks and other water conveyance systems contributes to the efficient and dependable operation of hydroelectric power plants.

Q: What are the different types of linings available for ductile iron pipe?: Ductile iron pipes offer various linings with distinct advantages and applications. 1. Cement mortar lining: The most commonly used lining for ductile iron pipes is cement mortar. It involves applying a layer of cement mortar to the pipe's interior surface. This lining excels in resisting corrosion and chemical attacks, making it suitable for potable water distribution, wastewater conveyance, and industrial pipelines. Additionally, it improves flow efficiency by reducing friction and turbulence within the pipe. 2. Polyethylene lining: Ductile iron pipes often utilize polyethylene linings when corrosion resistance is a primary concern. This lining consists of a layer of high-density polyethylene (HDPE), either extruded or sprayed onto the inner surface of the pipe. Polyethylene lining provides exceptional resistance to corrosion, abrasion, and chemical attacks, making it ideal for transporting aggressive fluids such as saltwater, chemicals, or industrial waste. 3. Polyurethane lining: For applications requiring protection against abrasive wear, polyurethane linings are commonly employed in ductile iron pipes. This lining is created by spraying or pouring a layer of polyurethane onto the inner surface of the pipe. Polyurethane lining offers excellent resistance to abrasion, impact, and chemical attacks. It is suitable for conveying abrasive slurries, mining applications, and other high-wear environments. 4. Epoxy lining: To safeguard against corrosion and chemical attacks, epoxy linings are applied to ductile iron pipes. This lining is typically formed by applying a layer of epoxy resin to the pipe's inner surface using centrifugal casting or electrostatic spraying. Epoxy lining demonstrates outstanding adhesion and corrosion resistance, making it suitable for various applications like potable water distribution, wastewater treatment, and industrial pipelines. 5. Zinc lining: Ductile iron pipes employ zinc linings to provide cathodic protection against corrosion. This lining involves applying a layer of zinc to the pipe's inner surface through hot-dip galvanizing or electroplating. Zinc lining acts as a sacrificial anode, corroding preferentially to the iron pipe and shielding it from corrosion. It is commonly used in highly corrosive environments like seawater or acidic soils. Ultimately, the selection of a lining for ductile iron pipes relies on the specific requirements of the application, including the transported fluid, desired corrosion resistance, and potential for abrasive wear. Seeking guidance from industry experts and considering factors like cost, longevity, and maintenance requirements aids in determining the most suitable lining option for a particular project.

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