DUCTILE IRON PIPE DN100

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Specification:

1) The standard of pipe: ISO2531:1998, K9

2) Effective length: 6m

3) Inner cement line: Portland cement line as per ISO4179

4) Zinc coating: at least 130g/m² as per ISO8179

5) Bitumen painting: at least 70um as per ISO8179

6) With 100% quantity of NBR ring, or SBR ring, or EPDM ring as per ISO4633

7) DN80mm-800mm

8) High strength, lighter than grey iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life tome about 100 yeas

9) Produced by Hangzhou chunfeng machine

10) Checked by automatic inspection equipment

11) Composition:

Chemical composition
Chemical composition	Ductile Cast Iron Pipe (%)	Grey iron pipe (%)	Steel pipe (%)
C	3.5-4.0	3.2-3.8	0.1-0.2
Si	1.9-2.6	1.4-2.2	0.15-0.4
Mn	0.15-0.45	0.4-0.6	0.3-0.6
P	≤0.06	≤0.3	0.02-0.03
S	≤0.02	≤0.1	0.02-0.03
Mg	0.03-0.06

12) Feature:

Mechanical properties
	Ductile Cast Iron Pipe	Grey Iron Pipe	Steel Pipe
Tensile Strength(Mpa)	≥420	150-260	≥400
Yield Strength(Mpa)	≥300	No Confirmation	No Confirmation
Bending Strength(Mpa)	≥590	200-360	≥400
Elongation (%)	≥10	Neglected	≥18
Brinell Hardness(HBS)	≤230	≤230	About 140

13) T type mechanical joint

14) Packing: in bulk or container

Q:How can stainless steel pipes and ductile iron pipes be joined?: Or with a gland type expansion joint, by tightening the pressure plate bolts, sealing pipe fittings and pipe wall, so as to achieve sealing, while retractable function

Q:What is the cost of ductile iron pipes compared to other pipe materials?: The cost of ductile iron pipes can vary depending on various factors such as size, length, and supplier. However, in general, ductile iron pipes tend to be more expensive compared to other pipe materials such as PVC (polyvinyl chloride) or steel. This is mainly due to the manufacturing process and the inherent qualities of ductile iron that make it a durable and reliable choice for various applications. Ductile iron pipes are known for their high tensile strength, resistance to corrosion, and durability, making them suitable for carrying potable water, wastewater, and other fluids under high pressure. The production process of ductile iron involves adding magnesium to cast iron, which results in improved strength and flexibility. This additional process, along with the quality of the material, contributes to the higher cost. On the other hand, pipes made from materials like PVC or steel can be less expensive. PVC pipes are lightweight, easy to install, and relatively inexpensive, making them a popular choice for low-pressure applications such as irrigation or drainage systems. Steel pipes, known for their strength and durability, are often used in high-pressure applications but come at a higher cost than PVC. Ultimately, the cost of ductile iron pipes may be higher initially, but their longer lifespan and reliability can offset the investment over time. Additionally, factors such as the specific project requirements, local regulations, and availability of materials can also influence the overall cost comparison between ductile iron pipes and other pipe materials.

Q:How is ductile iron pipe protected against external corrosion?: Ductile iron pipe is protected against external corrosion through a variety of methods that ensure its durability and longevity. One common method is the application of protective coatings. The pipe is typically coated with a layer of zinc or asphaltic material, which acts as a barrier between the iron pipe and the surrounding environment. This coating helps to prevent direct contact between the pipe and corrosive elements such as soil, moisture, and chemicals, thereby reducing the risk of corrosion. Additionally, ductile iron pipes are often wrapped with a layer of polyethylene or polypropylene tape. This tape provides an extra layer of protection against external corrosion by serving as a physical barrier that shields the pipe from moisture and other potentially corrosive substances. The tape is applied with care to ensure complete coverage and adherence to the pipe's surface. Furthermore, cathodic protection is commonly employed to safeguard ductile iron pipes against external corrosion. This technique involves the installation of sacrificial anodes or impressed current systems near the pipe. These anodes generate a protective electrical current that counteracts the corrosion process, effectively inhibiting the deterioration of the pipe's surface. Lastly, proper installation practices play a crucial role in preventing external corrosion. It is essential to ensure that the pipe is buried at an appropriate depth, allowing for adequate soil coverage. This helps to minimize exposure to corrosive elements and maintain the integrity of the protective coatings. Additionally, proper backfilling techniques and the use of corrosion-resistant bedding materials can further enhance the pipe's resistance to external corrosion. In conclusion, ductile iron pipe is protected against external corrosion through a combination of protective coatings, tape wrapping, cathodic protection systems, and proper installation practices. These measures work together to provide a robust defense against the corrosive forces that the pipe may encounter, ensuring its longevity and reliability in various applications.

Q:What are the different methods for restraining ductile iron pipe?: There exist various techniques for restraining ductile iron pipe to prevent any movement or displacement caused by internal pressure, external forces, or ground movement. The most commonly used approaches include: 1. Thrust blocks: Concrete blocks or structures are positioned at bends, tees, or other directional changes in the pipe. These blocks are designed to resist the forces exerted by flowing water or fluids within the pipe, effectively anchoring it in place. 2. Mechanical restraints: Harnesses or clamps are installed around the pipe and affixed to a fixed structure, such as a wall or concrete anchor. These restraints provide a physical barrier that prevents any movement or shifting of the pipe. 3. Pipe restraints: Devices directly attached to the pipe and anchored to a fixed structure, such as pipe clamps, restraints, or saddles. They are designed to securely hold the pipe in place and resist any movement or displacement. 4. Proper pipe bedding and backfill: It is crucial to properly support and surround the pipe with compacted material to prevent any movement or shifting. This method involves carefully placing and compacting soil or suitable materials around the pipe to provide stability and prevent displacement. 5. Trench walls: The walls of the trench where the ductile iron pipe is installed can also contribute to restraining it. By correctly compacting the soil against the pipe and ensuring proper stability of the trench walls, the pipe can be effectively restrained and prevented from moving. Overall, the various methods for restraining ductile iron pipe aim to ensure its secure placement without any displacement or movement. The choice of method depends on factors such as location, application, and the forces acting on the pipe. It is important to consult with engineers and adhere to industry guidelines and standards to determine the most appropriate method for restraining ductile iron pipe in specific situations.

Q:How are ductile iron pipes protected against root intrusion?: Ductile iron pipes are protected against root intrusion through various methods and techniques. One commonly used approach is the application of root inhibitors or growth regulators. These chemicals are typically injected into the soil around the pipes, creating a barrier that inhibits root growth near the pipe. This helps prevent roots from penetrating the pipe and causing damage. Another method involves the use of physical barriers such as root barriers or sleeves. These are installed around the pipes to physically block the roots from accessing them. Root barriers are typically made of materials like plastic or metal and are designed to withstand the pressure exerted by growing roots. Additionally, regular maintenance practices such as periodic inspections and cleaning are essential in preventing root intrusion. By monitoring the condition of the pipes and removing any existing root masses, the risk of further root intrusion can be minimized. It is worth noting that preventative measures are more effective than reactive measures when it comes to protecting ductile iron pipes against root intrusion. Therefore, implementing proactive strategies during the installation phase, such as proper pipe bedding and alignment, can help reduce the likelihood of root intrusion in the first place. Overall, a combination of chemical treatments, physical barriers, and appropriate maintenance practices can significantly enhance the protection of ductile iron pipes against root intrusion, ensuring their long-term durability and functionality.

Q:Can ductile iron pipes be used in acidic environments?: Ductile iron pipes are capable of being utilized in acidic environments. These pipes possess a strong resistance to corrosion, rendering them suitable for a wide range of applications, including those involving acidic conditions. The heightened carbon content found in ductile iron pipes generates a shielding layer on the pipe's surface, effectively thwarting direct attacks from acid on the iron. Furthermore, the interior lining of the pipe can be coated with epoxy or other protective substances to bolster its resistance to corrosion in acidic settings. Nevertheless, it is crucial to take into account the precise concentration and type of acid present within the environment, as certain acids may still induce corrosion over time. It is highly recommended to seek counsel from professionals or manufacturers to ensure the appropriate selection of materials for specific acidic conditions.

Q:Can cast iron pipes not be used for domestic water supply and drainage?: Yes, the main use is, outdoor water supply pipe can be PE or ductile iron (socket connection). Indoor water is now used in general plastic pipes, but in the past seems to be able to use ductile iron, as for drainage, generally do pressure type drainage, when the choice is cast iron pipe. There are also indoor fire pipes using welded steel tubes or ductile iron.

Q:How does ductile iron pipe perform in extreme temperatures?: Ductile iron pipe performs well in extreme temperatures due to its ability to expand and contract without cracking or breaking. It has a high thermal conductivity, allowing it to efficiently transfer heat without compromising its structural integrity. Additionally, its corrosion resistance properties make it suitable for both hot and cold environments, ensuring long-term performance even in extreme temperature conditions.

Q:What are the different types of joints used in ductile iron pipes?: The different types of joints used in ductile iron pipes include push-on joints, restrained joints, mechanical joints, flanged joints, and welded joints.

Q:How does ductile iron pipe handle soil movement?: Ductile iron pipe is known for its excellent strength and durability, making it highly capable of handling soil movement. When the soil around the pipe shifts or settles, ductile iron pipes have the ability to flex and accommodate such movement without compromising their structural integrity. One of the key features that allows ductile iron pipes to handle soil movement is their inherent ability to withstand bending and stretching. They possess a high degree of flexibility, allowing them to adjust to ground shifts and settle without breaking or cracking. This flexibility is due to the unique material properties of ductile iron, which is a type of cast iron that has been treated with magnesium to enhance its strength and elasticity. Moreover, ductile iron pipes are designed with a thick-walled construction, which adds to their resistance against soil movement. This robust construction helps distribute the forces exerted by the shifting soil, minimizing the impact on the pipe and preventing any significant damage. In addition, ductile iron pipes are usually installed with appropriate bedding and backfill materials to provide additional support and stability. This includes using compacted soil or engineered granular materials around the pipe, which helps to evenly distribute the load and reduce the potential for soil movement. Overall, ductile iron pipe is an ideal choice for areas with high soil movement, such as regions with expansive or unstable soils. Its flexibility, strength, and proper installation techniques make it capable of handling the challenges posed by soil movement, ensuring long-lasting and reliable performance in various applications.

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