DUCTILE IRON PIPE DN400 K8

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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: 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 connected?: Ductile iron pipes are typically connected using several methods, including flanged joints, mechanical joints, and push-on joints. Flanged joints involve connecting two pipe sections with a flanged coupling. The pipe ends have flanges that are bolted together, creating a secure and leak-proof connection. This method is commonly used for larger diameter pipes or in applications that require a rigid joint. Mechanical joints utilize a mechanical joint gland and rubber gasket to create a watertight seal. The pipe ends are inserted into the gland, and the bolts are tightened to compress the gasket, ensuring a reliable connection. This method is often used in water distribution systems due to its flexibility and ease of installation. Push-on joints involve using a rubber gasket to create a tight seal between pipe sections. The gasket is placed in a groove on one pipe end, and the other pipe is pushed onto it, creating a compression seal. This method is quick and simple, making it suitable for various applications, including sewer systems and underground piping. Overall, the choice of connection method for ductile iron pipes depends on factors such as pipe diameter, application requirements, and installation conditions. It is crucial to follow the manufacturer's recommendations and industry standards to ensure proper installation and reliable performance.

Q: Can ductile iron pipes be used in areas with high soil settlement?: Yes, ductile iron pipes can be used in areas with high soil settlement. Ductile iron pipes are known for their strength and durability, which makes them suitable for various soil conditions, including areas with high soil settlement. These pipes have the ability to withstand external loads and ground movement, making them an ideal choice for such areas. Additionally, ductile iron pipes have a high resistance to corrosion, which further enhances their suitability for use in areas with high soil settlement. However, it is important to consider factors such as proper installation techniques, appropriate bedding and backfill materials, and regular maintenance to ensure the longevity and performance of the ductile iron pipes in areas with high soil settlement. Consulting with a qualified engineer or pipe manufacturer can provide more specific guidance based on the site's conditions and requirements.

Q: What is the expected bedding and backfill requirements for ductile iron pipes?: The expected bedding and backfill requirements for ductile iron pipes are vital for ensuring the longevity and proper functioning of the pipe system. Ductile iron pipes are known for their durability and strength, but they still require careful installation to prevent any potential damage or compromised performance. The bedding requirements for ductile iron pipes involve providing a stable and uniform support system to distribute the loads and stresses from the surrounding soil. The pipe should be surrounded by a bedding material that is free from rocks, debris, or any sharp objects that could potentially cause damage. The bedding material should also have sufficient compaction to prevent settlement or shifting that could lead to misalignment or pipe failure. Typically, the bedding material used for ductile iron pipes is a granular material, such as sand or fine aggregate, with a thickness of at least 6 inches. This material should be placed beneath and around the pipe in a uniform manner to provide a continuous support system. Additionally, the bedding material should be compacted to at least 90% of the maximum dry density to ensure proper stability and load distribution. Backfill requirements for ductile iron pipes involve the material used to fill the remaining space around the pipe after the bedding has been installed. The backfill material should also be free from rocks, debris, or sharp objects that could potentially damage the pipe. It should provide support and protection to the pipe while allowing for proper compaction and settling. The backfill material for ductile iron pipes is typically a granular material, such as sand or fine aggregate, with a maximum particle size of 1 inch. The backfill material should be placed and compacted in layers, ensuring that the compaction is done uniformly and evenly around the pipe. The compaction should be sufficient to prevent settlement or shifting of the backfill material, which could lead to pipe damage or misalignment. In summary, the expected bedding and backfill requirements for ductile iron pipes involve using a granular material that is free from rocks, debris, or sharp objects. The material should be placed and compacted in a uniform manner to provide stable support and protection to the pipe. Adhering to these requirements will help ensure the proper functioning and longevity of ductile iron pipe systems.

Q: Will nodular cast iron pipes rust?: Ductile iron pipe corrosion process is good, decided whether it will rust. Whether it will rust or not, the key is whether the anti-corrosion process of the nodular cast iron pipe is in place.

Q: Are ductile iron pipes suitable for use in hydropower projects?: Indeed, ductile iron pipes prove to be a suitable option for implementation in hydropower projects. Possessing a remarkable tensile strength and corrosion resistance, these pipes emerge as the ideal choice for applications in hydropower projects where water flow and pressure play a significant role. Demonstrating the ability to endure high pressure and boasting durability, these pipes guarantee long-term reliability and safety within hydropower systems. Furthermore, when compared to alternative materials such as steel, ductile iron pipes present a cost-effective solution, rendering them a favored selection for hydropower projects. In summary, ductile iron pipes possess the essential characteristics and performance qualities necessary to meet the rigorous conditions encountered in hydropower projects.

Q: What is the expected corrosion protection system for ductile iron pipes?: The expected corrosion protection system for ductile iron pipes typically includes a combination of internal and external coatings, such as cement mortar lining and an external polyethylene or epoxy coating. Additionally, sacrificial anode systems or impressed current cathodic protection may be employed to further enhance the corrosion resistance of the pipes.

Q: What is the weight of ductile iron pipe compared to other pipe materials?: Compared to other pipe materials, ductile iron pipe typically carries more weight. The weight of the pipe may differ depending on its size and thickness, yet in general, ductile iron pipe is more compact and has a greater weight per unit length than materials such as PVC, HDPE, or steel. The main reason for this increased weight is the composition of ductile iron pipe, which consists of iron and carbon, rendering it a robust and resilient choice for a range of piping purposes.

Q: What is the expected deflection capability of ductile iron pipes?: Compared to other pipe materials, ductile iron pipes typically have a high expected deflection capability. These pipes possess a flexible nature that enables them to withstand external loads and stresses without breaking or cracking. This flexibility allows the pipes to deflect under pressure, absorbing and evenly distributing the force along their length. Factors such as pipe diameter, wall thickness, and soil conditions can influence the specific deflection capability of ductile iron pipes. However, in general, these pipes can typically deflect up to 2% to 5% of their diameter without causing significant damage or compromising structural integrity. This deflection capability allows the pipes to adapt to ground movement, thermal expansion, and other external forces, making them highly resilient and reliable for various applications. It is important to consider the deflection capability of ductile iron pipes in conjunction with other design criteria, such as pipe burial depth, trench width, and backfill material. By following proper installation practices and adhering to industry standards and specifications, the expected deflection capability of ductile iron pipes can be optimized and maintained throughout their service life.

Q: Are ductile iron pipes compatible with other pipe materials?: Yes, ductile iron pipes are generally compatible with other pipe materials. Ductile iron pipes have a high level of flexibility and strength, making them suitable for connecting with different pipe materials such as PVC, HDPE, and steel. Transition fittings are commonly used to connect ductile iron pipes to other materials, ensuring a secure and leak-free joint. It is important to adhere to industry standards and guidelines when connecting different pipe materials to ensure compatibility and maintain the integrity of the pipeline system.

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