DUCTILE IRON PIPES AND PIPE FITTINGS K8 CLASS DN350

DUCTILE IRON PIPES AND PIPE FITTINGS K8 CLASS DN350

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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: What is the maximum allowable joint deflection for ductile iron pipes?: Industry standards and guidelines typically specify the maximum allowable joint deflection for ductile iron pipes. These standards can vary depending on the specific application and local regulations. Typically, the maximum allowable joint deflection for ductile iron pipes is limited to a range of 1% to 5% of the pipe diameter. This means that the pipe can tolerate a deflection of up to 1% to 5% of its diameter without causing significant damage or compromising its structural integrity. However, it is important to consider factors such as pipe size, wall thickness, and operating conditions as these can affect the exact maximum allowable joint deflection. For specific guidelines on the maximum allowable joint deflection for ductile iron pipes in a given application, it is recommended to consult relevant industry standards like those published by the American Water Works Association (AWWA) or the International Organization for Standardization (ISO).

Q: What is the composition of ductile iron pipes?: Ductile iron pipes are primarily composed of iron, along with small amounts of carbon, silicon, and other alloying elements. The iron content typically ranges from 90% to 94%, while carbon content is usually around 3% to 4%. Silicon is added in the range of 1.5% to 3%, which helps enhance the ductility and strength of the iron. Other alloying elements such as manganese, sulfur, and phosphorus may also be present in smaller quantities. The composition of ductile iron pipes is carefully engineered to achieve specific properties. The addition of carbon and silicon improves the hardness and strength of the iron, making it more suitable for demanding applications. The presence of these alloying elements also contributes to the ductility of the pipes, allowing them to be easily bent and molded without breaking. Overall, the composition of ductile iron pipes is designed to provide a balance between strength, ductility, and resistance to corrosion. This makes them ideal for use in water and sewage systems, where they can withstand high pressure, handle heavy loads, and resist the corrosive effects of water and other chemicals.

Q: How are ductile iron pipes protected against internal corrosion?: Ductile iron pipes are protected against internal corrosion through a combination of various preventive measures. One of the primary methods is the application of a protective coating on the inner surface of the pipe. This coating acts as a barrier between the pipe and the transported fluid, preventing direct contact and minimizing the chances of corrosion. Another common method used is the application of a cement mortar lining. This lining further enhances the protective barrier, reducing the likelihood of corrosion even in aggressive environments. The cement mortar also provides a smooth surface, reducing friction and improving the flow of water or other fluids through the pipe. In addition to coatings and linings, ductile iron pipes are often designed with corrosion-resistant alloys or additives. These alloys, such as zinc or epoxy, are added during the manufacturing process and provide an extra layer of protection against internal corrosion. They act as sacrificial anodes, corroding over time to protect the underlying iron from degradation. Regular maintenance and inspection are also crucial in protecting ductile iron pipes against internal corrosion. Monitoring the condition of the protective coatings, identifying any signs of degradation or damage, and promptly addressing any issues are essential to ensure the long-term integrity of the pipes. Overall, a combination of protective coatings, cement mortar linings, corrosion-resistant alloys, and regular maintenance efforts work together to effectively protect ductile iron pipes against internal corrosion, extending their lifespan and ensuring the safe transportation of fluids.

Q: Are ductile iron pipes resistant to microbiologically induced corrosion?: Yes, ductile iron pipes are generally resistant to microbiologically induced corrosion (MIC). Ductile iron is a type of cast iron that has been treated with magnesium to give it increased strength and flexibility. This treatment creates a protective layer on the surface of the iron, making it less susceptible to corrosion caused by microorganisms. MIC occurs when certain types of bacteria, fungi, or other microorganisms interact with the metal surface of pipes and produce corrosive byproducts. However, ductile iron is generally resistant to MIC because the protective layer formed during the manufacturing process acts as a barrier, preventing microorganisms from directly contacting the metal surface. Additionally, ductile iron pipes are often lined with cement mortar or other protective coatings, which further enhance their resistance to corrosion. These linings provide an additional layer of protection against microorganisms, reducing the potential for MIC. Despite these inherent resistance properties, it is important to note that the resistance to MIC can vary depending on the specific conditions and environment in which the pipes are installed. Factors such as water quality, temperature, and the presence of certain microorganisms can influence the susceptibility of ductile iron pipes to MIC. Therefore, it is essential to consider these factors and take appropriate measures to prevent MIC, such as regular monitoring of water quality, proper maintenance, and the use of corrosion inhibitors or biocides when necessary.

Q: Can ductile iron pipes be used for both water and sewage systems?: Yes, ductile iron pipes can be used for both water and sewage systems. Ductile iron pipes are known for their strength and durability, making them suitable for various applications. They have excellent resistance to corrosion and can withstand high pressures, making them ideal for transporting both water and sewage.

Q: Are ductile iron pipes more resistant to breaks and cracks than other pipe materials?: Yes, ductile iron pipes are generally more resistant to breaks and cracks compared to other pipe materials. Their unique composition and manufacturing process make them highly durable and flexible, allowing them to withstand high pressure, heavy loads, and ground movement without breaking or cracking easily.

Q: What are the different joint types available for ductile iron pipes?: Ductile iron pipes offer various joint types that are essential for maintaining the integrity and reliability of the pipeline system. 1. The push-on joint is the most prevalent joint used for ductile iron pipes. It involves inserting a rubber gasket into the bell end of the pipe and then pushing the spigot end into the bell, ensuring a tight seal. This joint is easy to assemble, quick, and has excellent resistance against soil movement and water pressure. 2. The mechanical joint involves a gland and follower that are secured around the spigot end of the pipe using bolts and nuts. It provides a robust and durable connection and is commonly used for larger diameter pipes or applications that expect higher pressure or thrust loads. 3. Flanged joints are utilized when connecting pipes to other components like valves or fittings. The pipe ends are machined and equipped with flanges that are bolted together using gaskets, ensuring a secure connection. These joints find frequent use in industrial applications or situations requiring frequent disassembly. 4. Restrained joints are designed to withstand significant external forces and prevent separation or pulling apart of the pipe. They typically combine mechanical joint components, such as bolts and glands, with additional restraining elements like welded or bolted-on restraints. These joints are commonly employed in high-pressure applications or situations where substantial external forces are present. Choosing the appropriate joint type is crucial and depends on factors such as pipeline design, operating conditions, and installation requirements. Seeking guidance from experienced engineers or pipe manufacturers can aid in determining the most suitable joint type for a specific ductile iron pipe application.

Q: How are ductile iron pipes made?: Ductile iron pipes are made through a process called centrifugal casting. In this method, molten iron is poured into a rapidly spinning mold, which forces the iron to evenly distribute along the walls of the mold. As the mold continues to spin, the iron cools and solidifies, forming a hollow cylindrical shape. This process allows the iron to retain its strength and flexibility, making it suitable for use in various piping applications.

Q: What is the maximum temperature that ductile iron pipes can handle?: The ability of ductile iron pipes to withstand high temperatures is influenced by factors like the grade of ductile iron, the application, and the duration of exposure to heat. Typically, ductile iron pipes are advised to be used within a temperature range of approximately 400-450 degrees Fahrenheit (205-232 degrees Celsius). However, it is essential to refer to the manufacturer's instructions and specifications for the particular product, as temperature limits may vary slightly among grades and manufacturers. Additionally, it is vital to take into account the thermal expansion and contraction properties of ductile iron pipes to prevent any possible problems in environments with elevated temperatures.

Q: Are ductile iron pipes suitable for use in food processing plants?: Ductile iron pipes are indeed suitable for use in food processing plants due to their numerous advantageous qualities. Firstly, they possess immense strength and durability, enabling them to withstand high-pressure situations. This feature proves crucial in food processing plants where pipes encounter diverse pressures during liquid and slurry transportation. Moreover, ductile iron pipes exhibit exceptional resistance to corrosion. This attribute becomes paramount in food processing plants as the pipes come into contact with various types of food, beverages, and cleaning agents, which can gradually corrode them. The corrosion resistance of ductile iron pipes ensures the pipes' integrity and safeguards the food products from contamination. Furthermore, these pipes display remarkable resistance to temperature fluctuations, rendering them suitable for the extreme temperature conditions often present in food processing plants. They can endure both hot and cold fluids without compromising their structural integrity. Additionally, ductile iron pipes possess a smooth inner surface, contributing to the maintenance of food product quality and purity. The smooth interior minimizes deposits like scaling or biofilm, thereby reducing the risk of bacterial growth. This quality proves essential in food processing plants where maintaining a hygienic environment is of utmost importance. Lastly, ductile iron pipes are easy to install and maintain. They boast a lengthy service life and require minimal upkeep, thereby minimizing downtime and associated costs in food processing plants. Considering these factors, ductile iron pipes emerge as a reliable and suitable choice for use in food processing plants. They ensure the safe and efficient transportation of fluids while meeting the industry's stringent hygiene and quality requirements.

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