DUCTILE IRON PIPE DN125K8/C/K9

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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 are the differences between ductile cast iron pipes and centrifugal ductile iron pipes?: Small, thin pipe fittings are usually rolled or continuously cast, and large, thick pipes are usually centrifugally cast. Compared to sand casting, the tissue is compact and homogeneous.

Q: Are ductile iron pipes suitable for pressure reducing valve stations?: Yes, ductile iron pipes are suitable for pressure reducing valve stations. Ductile iron pipes have excellent strength and durability, making them capable of withstanding high pressure conditions. They also have good corrosion resistance, which is essential for long-term reliability in a pressure reducing valve station.

Q: Ductile iron pipes perennial bubbles in the water will rot it: Ductile iron pipes mainly called centrifugal ductile iron pipe, it has the properties of nature, iron and steel, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..

Q: Is the spigot and socket connection of the ductile iron tube reversed?: The whole process is formed by the radial compression of the pipe blank and the stretching process of the branch pipe. Different from the hydraulic bulging three, the metal of the three way joint pipe is compensated by the radial movement of the tube blank, so it is also called radial compensation process.

Q: Are ductile iron pipes resistant to hydrogen sulfide corrosion?: Yes, ductile iron pipes are generally resistant to hydrogen sulfide corrosion. Ductile iron is a type of cast iron that has been treated with magnesium to create a more flexible and durable material. This treatment significantly enhances its resistance to corrosion, including corrosion caused by hydrogen sulfide. The magnesium in the ductile iron forms a protective layer on the surface, preventing the penetration of hydrogen sulfide and other corrosive agents. However, it is important to note that the resistance of ductile iron pipes to hydrogen sulfide corrosion can still be influenced by factors such as the concentration and duration of exposure to the corrosive environment. Therefore, proper maintenance, regular inspection, and appropriate protective measures should still be implemented to ensure the long-term durability and performance of ductile iron pipes in the presence of hydrogen sulfide.

Q: Ductile iron pipe is flexible pipe or rigid pipe: Steel tubes, of course, because ductile iron pipes are not easily deformed.

Q: Can ductile iron pipes be used in areas with high soil erosion?: Due to their inherent strength and durability, ductile iron pipes can be utilized in regions with substantial soil erosion. Ductile iron, a type of iron treated with graphite nodules, enhances its flexibility and tensile strength, rendering it highly resistant to cracking and breaking, even in extreme conditions. In areas with high soil erosion, the ground tends to shift and move, imposing significant stress on underground pipes. Nevertheless, ductile iron pipes exhibit high resistance to external loading and can endure the pressures exerted by the surrounding soil. Their reliability in such environments has been extensively tested and proven. Moreover, ductile iron pipes boast a lengthy lifespan, often exceeding 100 years, making them a cost-effective choice for areas with substantial soil erosion. Their corrosion resistance and structural integrity render them suitable for installation in diverse soil conditions, including those susceptible to erosion. It is crucial to note that proper installation techniques, like employing appropriate bedding and backfill materials, must be adhered to in order to ensure the optimal performance of ductile iron pipes in areas with high soil erosion. Additionally, regular inspection and maintenance should be carried out to promptly identify any potential issues and prevent damage resulting from soil erosion. All in all, ductile iron pipes serve as a dependable and durable option for regions with high soil erosion, providing enduring and efficient water distribution and wastewater management systems.

Q: Are ductile iron pipes resistant to frost heave?: Ductile iron pipes are generally considered to be resistant to frost heave. Frost heave occurs when water in the ground freezes and causes the surrounding soil to expand and lift. Ductile iron pipes have high tensile strength and flexibility, which allows them to withstand the forces exerted by frost heave without cracking or breaking. Moreover, ductile iron pipes have a high resistance to impact and can handle significant external loads. This makes them particularly suitable for areas that experience freezing temperatures and potential frost heave. Additionally, the joints in ductile iron pipes are designed to provide a tight seal and prevent water infiltration, reducing the risk of freezing and subsequent frost heave. However, it is important to note that while ductile iron pipes are resistant to frost heave, they are not completely immune to it. Extreme temperature fluctuations, prolonged freezing conditions, or inadequate insulation can still pose a risk to the integrity of the pipes. Therefore, proper installation techniques, including appropriate bedding and backfilling materials, thermal insulation, and proper maintenance, are crucial to ensure the long-term performance and resistance of ductile iron pipes to frost heave.

Q: Are ductile iron pipes suitable for potable water systems?: Yes, ductile iron pipes are suitable for potable water systems. Ductile iron is a strong and durable material that is resistant to corrosion, making it a reliable choice for transporting drinking water. Additionally, ductile iron pipes have been widely used in potable water systems for many years, proving their suitability and effectiveness.

Q: What is the expected corrosion rate of ductile iron pipes?: The expected corrosion rate of ductile iron pipes can vary depending on several factors, including the specific environment in which the pipes are installed, the pH and composition of the water or soil they come into contact with, and the presence of any corrosive substances or chemicals. In general, ductile iron pipes are known for their excellent resistance to corrosion compared to other materials such as cast iron or steel. This is due to the presence of a protective layer called a passive film, which forms naturally on the surface of the pipes when exposed to oxygen in the environment. This passive film acts as a barrier, preventing further corrosion from occurring. However, it is important to note that even ductile iron pipes can experience some level of corrosion over time, especially in aggressive or highly corrosive environments. The expected corrosion rate can range from very low to moderate, depending on the aforementioned factors. To ensure the longevity and performance of ductile iron pipes, it is recommended to implement proper maintenance and monitoring practices. This includes regular inspections, cleaning, and the application of protective coatings or linings when necessary. Additionally, implementing a cathodic protection system can further enhance the corrosion resistance of the pipes. Ultimately, it is important to consult with experts and professionals in the field of corrosion and pipe materials to accurately determine the expected corrosion rate of ductile iron pipes in a specific application or environment.

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