DUCTILE IRON PIPE DN125

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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 do ductile iron pipes perform in high-traffic areas?: Ductile iron pipes perform exceptionally well in high-traffic areas due to their inherent strength and durability. These pipes are manufactured using a unique composition that includes graphite nodules, which give them their characteristic ductility. This ductility allows the pipes to flex and withstand heavy loads and vibrations caused by traffic without cracking or breaking. In high-traffic areas, where the ground is subject to constant movement and heavy loads from vehicles, ductile iron pipes offer superior resistance to stress and impact. Their ability to absorb and distribute the pressure from traffic ensures that these pipes maintain their structural integrity over time. This is particularly important as any damage or failure in a pipe system can result in costly repairs and disruptions to the water supply. Furthermore, ductile iron pipes are highly resistant to corrosion, making them suitable for installation in high-traffic areas exposed to various environmental conditions. The pipes are typically lined with a protective layer, such as cement mortar or epoxy, which provides an additional barrier against external factors. This corrosion resistance ensures the longevity of the pipes, reducing the need for frequent maintenance or replacement. Additionally, ductile iron pipes have excellent flow characteristics, allowing for efficient water distribution even in areas with high traffic demands. Their smooth interior surface minimizes friction and pressure losses, ensuring a consistent and reliable water supply to meet the needs of the surrounding population. Overall, ductile iron pipes are a reliable and robust choice for high-traffic areas. Their strength, durability, corrosion resistance, and efficient flow characteristics make them well-suited for withstanding the demands and challenges posed by heavy traffic, ensuring the continuous supply of water without compromising the structural integrity of the pipe system.

Q:Can ductile iron pipe be used for mining applications?: Yes, ductile iron pipe can be used for mining applications. It is commonly used in mining operations due to its high strength, durability, and resistance to corrosion. Ductile iron pipe can withstand the harsh conditions and demanding requirements of mining, making it a suitable choice for transporting water, slurry, and other substances in mining operations.

Q:Can ductile iron pipes be used in areas with high soil liquefaction potential?: No, ductile iron pipes are not recommended for areas with high soil liquefaction potential.

Q:How are ductile iron pipes installed?: Typically, the installation of ductile iron pipes follows a specific process. Firstly, the required depth and width of the trench are excavated. Careful leveling and compaction of the trench's bottom then establish a stable foundation. Next, a bedding material, usually a mixture of sand and gravel, is placed at the trench's bottom. This material supports the pipe and distributes the load evenly, while also safeguarding it from any sharp objects in the soil. Once the bedding is prepared, the ductile iron pipes are gently lowered into the trench and aligned as desired. Proper alignment and the correct slope are essential for efficient water flow. Subsequently, the pipes are joined together using either a mechanical joint or a push-on joint system. These joints are designed to create a secure, leak-free connection between the pipes. Rubber gaskets are typically used to seal the joints and establish a watertight seal. After joining the pipes, the trench is backfilled with the excavated soil. Care is taken to compact the soil in layers to prevent settlement. The backfilling process is typically carried out in stages to ensure proper compaction. Lastly, the installation is completed by connecting the ductile iron pipes to the existing water supply system or other pipes using appropriate fittings and valves. Pressure testing may also be conducted to verify the installation's integrity. In conclusion, the installation of ductile iron pipes necessitates meticulous planning, precise alignment, and secure jointing to establish a durable and dependable water supply system.

Q:Are there any alternatives to ductile iron pipe for water distribution?: Yes, there are several alternatives to ductile iron pipe for water distribution. Some commonly used alternatives include: 1. PVC (Polyvinyl Chloride) Pipe: PVC pipe is a popular choice for water distribution due to its low cost, durability, and corrosion resistance. It is lightweight, easy to install, and requires minimal maintenance. 2. HDPE (High-Density Polyethylene) Pipe: HDPE pipe is a flexible and durable option for water distribution. It is resistant to corrosion, chemicals, and UV rays, making it suitable for both aboveground and underground installations. HDPE pipe is also known for its leak-free joints and long service life. 3. PEX (Cross-linked Polyethylene) Pipe: PEX pipe is a flexible plastic pipe that is commonly used for water distribution in residential and commercial applications. It is known for its resistance to freezing, scaling, and corrosion. PEX pipe is easy to install, has fewer joints, and is highly durable. 4. Copper Pipe: Copper pipe has been used for water distribution for many years due to its excellent corrosion resistance and long lifespan. Although it is more expensive than other alternatives, copper pipe is known for its reliability and ability to handle high pressure. 5. Steel Pipe: Steel pipe is a strong and durable option for water distribution, especially in high-pressure applications. It can withstand extreme temperatures and is resistant to external loads. However, steel pipe is more expensive and requires specialized installation techniques. It is important to consider factors such as cost, durability, corrosion resistance, installation requirements, and specific project needs when choosing an alternative to ductile iron pipe for water distribution.

Q:Are ductile iron pipes resistant to impact damage?: Ductile iron pipes possess remarkable strength and durability, rendering them resistant to impact damage. Their exceptional toughness and flexibility are a result of their unique composition, which includes a higher percentage of carbon and silicon. Consequently, ductile iron pipes can withstand external forces and impacts, such as those caused by heavy construction equipment or accidental incidents during installation or maintenance activities. Moreover, these pipes exhibit a high resistance to cracking and fracturing, thereby further enhancing their ability to endure impact damage. However, it should be noted that although ductile iron pipes are highly resistant to impact damage, they are not completely immune. Extreme or repeated impacts may still inflict damage, albeit to a lesser extent compared to other pipe types. Regular inspections and maintenance are crucial to detecting and addressing any potential impact damage to ensure the long-term integrity and performance of ductile iron pipes.

Q:Are ductile iron pipes resistant to acid attacks?: Generally, ductile iron pipes exhibit resistance to acid attacks. Ductile iron, a form of cast iron which has undergone magnesium treatment to enhance its strength and ductility, produces a more durable material capable of withstanding corrosive conditions, including acids. Nevertheless, it is crucial to acknowledge that the resistance level may vary depending on the specific acid type and concentration involved. In highly corrosive environments, where powerful acids or high concentrations are present, it may be necessary to implement additional protective measures such as applying a lining or coating to the pipes. Moreover, regular inspection and maintenance are vital to ensure the long-term durability and resistance of ductile iron pipes.

Q:Are ductile iron pipes suitable for use in chemical storage tanks?: Chemical storage tanks cannot be made with ductile iron pipes since they are not able to resist corrosion caused by different chemicals. While ductile iron pipes possess exceptional mechanical properties, such as high tensile strength and impact resistance, they are not equipped to handle the corrosive nature of chemicals. To ensure the safety and integrity of the tank, materials that can withstand the corrosive properties of the stored chemicals, such as fiberglass-reinforced plastic (FRP), stainless steel, or high-density polyethylene (HDPE), are commonly used for chemical storage tanks. It is of utmost importance to carefully choose the appropriate material for chemical storage tanks in order to prevent leaks, contamination, and potential hazards.

Q:Can ductile iron pipes be used for underground water treatment systems?: Yes, ductile iron pipes can be used for underground water treatment systems. Ductile iron is known for its strength and durability, making it a suitable choice for underground applications. Additionally, ductile iron pipes have excellent corrosion resistance, which is important for water treatment systems that may come into contact with various chemicals and contaminants.

Q:What is the expected bedding and backfill requirements for ductile iron pipes?: To ensure the longevity and proper functioning of ductile iron pipes, it is crucial to meet the expected bedding and backfill requirements. Although these pipes are known for their durability and strength, careful installation is still necessary to prevent any potential damage or compromised performance. The bedding requirements for ductile iron pipes entail establishing 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 devoid of rocks, debris, or any sharp objects that could potentially cause harm. Moreover, the bedding material should be adequately compacted to prevent settlement or shifting, which could result in misalignment or pipe failure. Typically, a granular material such as sand or fine aggregate is employed as the bedding material for ductile iron pipes, with a minimum thickness of 6 inches. This material should be evenly placed beneath and around the pipe to provide a continuous support system. Additionally, it should be compacted to at least 90% of the maximum dry density to ensure proper stability and load distribution. As for the backfill requirements, they pertain to the material used to fill the remaining space around the pipe after the bedding has been installed. Similar to the bedding material, the backfill material should be free from rocks, debris, or sharp objects to prevent damage. It should offer support and protection to the pipe while allowing for proper compaction and settling. The backfill material for ductile iron pipes typically consists of a granular substance such as sand or fine aggregate, with a maximum particle size of 1 inch. It should be placed and compacted in layers, ensuring that the compaction is uniform and even around the pipe. Sufficient compaction is crucial to avoid settlement or shifting of the backfill material, which could potentially harm or misalign the pipe. In conclusion, meeting the expected bedding and backfill requirements for ductile iron pipes necessitates the use of a granular material that is free from rocks, debris, or sharp objects. This material should be evenly placed and compacted 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.

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