DUCTILE IRON PIPE DN500 K8

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Payment Terms:: TT OR LC

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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 does ductile iron pipe perform in high-temperature steam applications?: Ductile iron pipe performs well in high-temperature steam applications due to its inherent strength and ability to withstand thermal stress. Its high melting point and resistance to corrosion make it a reliable choice for transporting steam at elevated temperatures. Additionally, ductile iron's thermal conductivity helps to dissipate heat efficiently, ensuring the pipe's integrity and preventing potential failures.

Q: What are the typical installation methods for ductile iron pipe?: The typical installation methods for ductile iron pipe involve several steps to ensure proper installation and functionality. Firstly, the trench is excavated to the required depth and width, accounting for the pipe diameter and bedding material. The bottom of the trench is then carefully prepared by removing any sharp objects or debris that could potentially damage the pipe. Next, a layer of suitable bedding material such as sand or fine gravel is placed evenly along the bottom of the trench to provide support and prevent any point loading on the pipe. The bedding material is compacted to ensure stability and eliminate any voids that could cause the pipe to settle or shift over time. After the bedding is in place, the ductile iron pipe is carefully lowered into the trench, taking precautions to prevent any damage to the pipe's protective coating. The pipes are then aligned and supported at regular intervals using appropriate pipe supports or blocks. Once the pipe is properly aligned, the joints are assembled by applying a lubricant and inserting a rubber gasket into the bell end of the pipe. The spigot end of the adjacent pipe is then inserted into the bell end, creating a secure and watertight seal. After the joints are assembled, the backfilling process begins. Backfill material, typically a combination of native soil and select backfill, is carefully placed around the pipe in layers and compacted to provide stability and prevent any voids. The backfilling process is carried out gradually, allowing for proper compaction and avoiding excessive pressure or damage to the pipe. Finally, the trench is fully backfilled and compacted, ensuring that the pipe is adequately supported and protected from external forces. Surface restoration is then performed to restore the area to its original condition, minimizing any disruption caused by the installation process. It is important to note that these installation methods may vary depending on project specifications, local regulations, and engineering recommendations. Therefore, it is essential to consult the manufacturer's guidelines and work closely with qualified professionals to ensure proper installation of ductile iron pipe.

Q: How are ductile iron pipes protected against freeze-thaw cycles?: Ductile iron pipes are protected against freeze-thaw cycles through several measures. Firstly, the material used in ductile iron pipes is inherently resistant to low temperatures and can withstand freezing conditions without becoming brittle or prone to cracking. Additionally, the pipes are often coated with a protective layer, such as cement mortar lining or polyethylene encasement, to provide an extra barrier against freeze-thaw damage. These coatings serve to insulate the pipe and prevent direct contact between the iron and the surrounding environment. Furthermore, ductile iron pipes are commonly designed with joints that allow for movement and flexibility, which helps to accommodate any expansion or contraction that may occur during freeze-thaw cycles. This flexibility reduces the risk of pipe breakage or damage due to the pressure exerted by freezing water inside the pipe. Moreover, proper installation practices, including adequate bedding and backfilling, are crucial in protecting ductile iron pipes against freeze-thaw cycles. Ensuring that the pipes are properly supported and surrounded by suitable materials helps to minimize the impact of freezing temperatures on the structural integrity of the pipes. Regular inspection and maintenance of ductile iron pipes are also essential in identifying any potential issues caused by freeze-thaw cycles. Periodic assessments can help detect any signs of damage or deterioration, enabling timely repairs or replacement to prevent further damage. In summary, ductile iron pipes are protected against freeze-thaw cycles through the inherent resistance of the material, protective coatings, flexible joints, proper installation practices, and regular maintenance. These measures collectively contribute to the durability and longevity of ductile iron pipes, even in cold weather conditions.

Q: Can ductile iron pipes be used for irrigation systems?: Certainly, irrigation systems can utilize ductile iron pipes. These pipes possess exceptional strength and durability, rendering them appropriate for a wide range of uses, including irrigation. They exhibit resistance to corrosion and boast a lengthy lifespan, guaranteeing their ability to endure the challenging conditions frequently associated with irrigation systems. Moreover, ductile iron pipes possess a sleek inner surface, facilitating efficient water flow and minimizing friction loss. This renders them highly suitable for the transportation of water over extensive distances, thereby ensuring the thorough irrigation of crops or landscapes. In summary, ductile iron pipes represent a dependable and economically viable option for irrigation systems.

Q: How to control mortar proportioning in ductile iron pipe cement coating: The mixing ratio of ductile iron pipe cement coating mortar is indicated on the design drawings, and the amount of raw material can be calculated according to mortar varieties and mixture ratio.

Q: Can ductile iron pipe be used for wastewater treatment plant applications?: Yes, ductile iron pipe can be used for wastewater treatment plant applications. It is known for its durability, corrosion resistance, and ability to withstand high-pressure environments, making it suitable for transporting wastewater in such facilities.

Q: How does ductile iron pipe compare to steel pipe in terms of durability?: Ductile iron pipe is generally considered to be more durable than steel pipe. It has superior strength and durability due to its unique microstructure, which allows it to withstand higher levels of pressure, impacts, and loads. Ductile iron pipe also has better corrosion resistance properties, making it less prone to rust and deterioration compared to steel pipe. Additionally, ductile iron pipe has a longer lifespan and requires less maintenance, making it a more reliable and durable choice for various applications.

Q: What are the advantages of using ductile iron pipe?: Using ductile iron pipe in various applications offers several benefits. Firstly, ductile iron pipe is renowned for its strength and durability. It possesses higher tensile and yield strengths compared to other pipe materials, making it highly resistant to cracking, bending, and breaking. This exceptional strength enables the pipe to withstand high-pressure and heavy-load conditions, making it an ideal choice for applications such as water and sewage systems, oil and gas pipelines, and industrial piping. Secondly, ductile iron pipe exhibits excellent corrosion resistance. It is coated with a protective layer, typically zinc or epoxy, which prevents rusting and corrosion. This coating ensures a longer lifespan for the pipe, even in harsh environments or when transporting corrosive fluids. Another advantage of ductile iron pipe lies in its flexibility. Unlike rigid pipes, ductile iron pipes possess a certain level of flexibility, enabling them to endure ground movements and settle without fracturing. This flexibility proves particularly advantageous in areas prone to earthquakes or soil settlements. Additionally, ductile iron pipe boasts a smooth inner surface, minimizing flow resistance and enhancing fluid transportation efficiency. It also reduces the likelihood of sediment accumulation or corrosion within the pipe, resulting in improved flow rates and decreased maintenance requirements. Furthermore, ductile iron pipe proves cost-effective in the long run. Although it may entail higher initial costs compared to other pipe materials, its durability and minimal maintenance needs make it a cost-effective choice over time. The extended lifespan of ductile iron pipe reduces the necessity for frequent replacements and repairs, contributing to lower overall life-cycle expenses. Lastly, ductile iron pipe exhibits environmental friendliness. It is manufactured using recycled materials, and its extended lifespan diminishes the need for frequent replacements, thereby reducing the carbon footprint associated with manufacturing and transportation. In conclusion, the utilization of ductile iron pipe offers numerous advantages, including exceptional strength, corrosion resistance, flexibility, smooth inner surface, cost-effectiveness, and environmental friendliness. These qualities establish it as a reliable and preferred option for various applications across diverse industries.

Q: What is the process of fusion bonding for ductile iron pipes?: The process of fusion bonding for ductile iron pipes involves joining two or more pipes together using heat and pressure to create a strong and durable bond. This technique is particularly used in the construction and installation of underground water, sewer, and gas pipelines. The first step in the fusion bonding process is to clean and prepare the surfaces of the pipes to be joined. This involves removing any dirt, debris, or rust that may interfere with proper bonding. Specialized cleaning tools and techniques, such as wire brushing or sandblasting, are often employed to ensure a clean and smooth surface. Once the surfaces are prepared, the pipes are aligned and clamped together. A fusion bonding machine, also known as a fusion welder, is then used to apply heat and pressure to the joint area. The fusion bonding machine consists of heating elements that are positioned around the joint and a hydraulic system that applies the necessary pressure. The heating elements are typically electric or gas-powered and are designed to reach temperatures high enough to melt the ductile iron material. As the heat is applied, the ductile iron surfaces begin to soften and fuse together, creating a strong bond. The pressure from the fusion bonding machine ensures that the molten iron flows evenly and uniformly between the joint surfaces, promoting a seamless connection. The duration of the fusion bonding process varies depending on the size and thickness of the pipes, as well as the specific requirements of the project. Once the fusion bonding is complete, the joint is allowed to cool and solidify, forming a permanent and leak-proof connection. Fusion bonding offers several advantages for ductile iron pipes. It provides a reliable and durable joint that can withstand high pressure, temperature variations, and external loads. The seamless connection also minimizes the risk of leaks, which is crucial for underground pipelines that transport water, sewage, or gas. Overall, fusion bonding is a widely used technique for joining ductile iron pipes, ensuring their structural integrity and longevity in various infrastructure projects.

Q: How are ductile iron pipes protected from external damage?: Ductile iron pipes are protected from external damage through the application of protective coatings. These coatings act as a barrier, shielding the pipes from corrosion and other forms of external damage. Additionally, the pipes may be encased in concrete or installed in a casing pipe to provide further protection against external forces and impacts.

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