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: Are ductile iron pipes resistant to soil movement?: Yes, ductile iron pipes are resistant to soil movement. Ductile iron pipes have a high tensile strength, which allows them to withstand external forces such as soil movement. These pipes are designed to be flexible and are able to absorb and distribute stresses caused by ground settlement or other forms of soil movement. Additionally, ductile iron pipes have a strong and durable construction that can resist the compressive forces exerted by the surrounding soil. Overall, ductile iron pipes are a reliable and resilient choice for underground pipelines, providing long-term stability and resistance to soil movement.

Q: Are ductile iron pipes suitable for hydroelectric power plants?: Indeed, hydroelectric power plants can benefit from the suitability of ductile iron pipes. Renowned for their robustness, endurance, and adaptability, ductile iron pipes prove to be an optimal selection for a variety of water industry applications, including hydroelectric power plants. These pipes exhibit the ability to endure substantial pressure and resist corrosion, thereby ensuring their appropriateness for the conveyance of water throughout the various stages of hydroelectric power generation. Moreover, the extended lifespan of ductile iron pipes and their minimal maintenance requirements effectively reduce the overall operational expenses associated with power plant maintenance. Consequently, ductile iron pipes emerge as a dependable and fitting choice for hydroelectric power plants.

Q: Do ductile iron pipes require internal linings for potable water?: No, ductile iron pipes do not require internal linings for potable water.

Q: What are the different lining thickness options for ductile iron pipe?: The different lining thickness options for ductile iron pipe typically range from 3 to 5 millimeters.

Q: How is ductile iron pipe tested for quality?: Extensive quality testing is carried out on ductile iron pipe to ensure its performance and reliability in various applications. The pipe undergoes a series of steps to assess its physical and mechanical properties. The hydrostatic pressure test is one of the main tests performed on ductile iron pipe. This test involves subjecting the pipe to fluid pressure that exceeds its designed operating pressure. The purpose is to determine if the pipe can withstand internal pressure without any leakage or failure. The pipe is filled with water or another suitable fluid, and the pressure is gradually increased to the required level. During this test, the pipe is carefully inspected for any signs of leakage or deformation. Another essential test is the tensile strength test, which measures the pipe's ability to resist pulling or stretching forces. A sample of the pipe is pulled until it breaks, and the maximum force applied during the test is recorded. This test helps determine important properties such as the pipe's ultimate tensile strength, yield strength, and elongation. The Charpy test is used to assess the pipe's impact resistance. In this test, a notched sample is struck with a swinging pendulum to measure the amount of energy absorbed by the pipe. It helps determine if the pipe can withstand sudden impacts or loads without fracturing. In addition to these tests, the pipe also undergoes various non-destructive tests, including ultrasonic testing, magnetic particle inspection, and visual inspection. These tests are crucial in detecting any internal or external defects, cracks, or abnormalities that could compromise the pipe's structural integrity. Furthermore, chemical analysis and metallographic examination are performed to evaluate the chemical composition and microstructure of the ductile iron pipe. These tests ensure that the pipe meets the necessary specifications and standards for its intended application. Overall, the testing process for ductile iron pipe is thorough and stringent. Its purpose is to guarantee the pipe's quality, durability, and overall performance in safely and efficiently delivering water, wastewater, or other fluids.

Q: How does ductile iron pipe perform in areas with high groundwater salinity?: Due to its inherent resistance to corrosion, ductile iron pipe is highly effective in areas with high groundwater salinity. The presence of elevated levels of salt and minerals in the groundwater can lead to the corrosion and deterioration of certain materials, but ductile iron is highly resilient to this type of corrosion. Its composition and manufacturing process make it less susceptible to damage from corrosive elements found in high salinity water. The primary reason for the corrosion resistance of ductile iron pipe lies in its protective iron oxide coating, which naturally forms on both the interior and exterior surfaces of the pipe. This coating acts as a barrier, preventing direct contact between the pipe and the corrosive elements present in the groundwater. Additionally, ductile iron pipes are often lined with cement mortar or a protective epoxy coating, further enhancing their resistance to corrosion and providing an extra layer of protection. Moreover, ductile iron pipe boasts an extended lifespan, often surpassing 100 years, making it an ideal choice for areas with high groundwater salinity. Its durability and resistance to corrosion ensure that it can withstand the harsh conditions associated with high salinity environments, minimizing the frequency of repairs or replacements. In conclusion, ductile iron pipe is an exceptional option for areas with high groundwater salinity due to its corrosion resistance properties. Its protective iron oxide coating, along with optional linings, offers a dependable and long-lasting solution, guaranteeing the integrity and performance of the pipe system even in demanding environments.

Q: What are the different pressure classes available for ductile iron pipes?: The different pressure classes available for ductile iron pipes typically range from Class 150 to Class 350.

Q: How do ductile iron pipes handle cyclic loading in offshore applications?: Ductile iron pipes possess remarkable strength and durability, rendering them suitable for a wide range of applications, including offshore usage. When it comes to dealing with cyclic loading in offshore settings, ductile iron pipes boast various characteristics that contribute to their exceptional performance. To begin with, ductile iron pipes demonstrate a high resistance to fatigue failure. Fatigue failure occurs when a material undergoes repeated stress cycles, leading to the initiation and propagation of cracks over time. Ductile iron pipes are specifically designed to endure cyclic loading without compromising their structural integrity. This is made possible by their inherent ductility and ability to effectively absorb and distribute stress. Furthermore, ductile iron pipes exhibit outstanding impact resistance. Offshore environments are prone to dynamic and unpredictable forces, such as waves and currents, which can exert sudden and intense loads on the pipes. The superior impact resistance of ductile iron allows it to withstand these forces without experiencing deformation or fractures, ensuring that the pipes remain intact and fully functional. Moreover, ductile iron pipes possess a unique microstructure that enables them to resist corrosion. Offshore applications expose pipes to harsh environmental conditions, including saltwater, which can accelerate the corrosion process. However, the protective graphite matrix present in ductile iron pipes acts as a barrier, preventing corrosive agents from reaching the underlying metal. As a result, the service life of the pipes is significantly prolonged. Additionally, ductile iron pipes have a high load-carrying capacity. In offshore applications, pipes often need to support heavy loads, such as those exerted by equipment, structures, or seabed settlements. The exceptional strength of ductile iron enables it to effectively bear these loads, ensuring the structural integrity and stability of the entire system. Lastly, ductile iron pipes offer ease of installation and maintenance. Their lightweight nature makes them easier to handle and transport during offshore operations. Furthermore, their corrosion resistance reduces the need for frequent maintenance, minimizing downtime and reducing the costs associated with repairs and replacements. In conclusion, ductile iron pipes exhibit excellent performance when it comes to handling cyclic loading in offshore applications. Their resistance to fatigue failure, impact resistance, corrosion resistance, high load-carrying capacity, and ease of installation and maintenance make them a dependable and efficient choice for offshore environments.

Q: What are the different types of valves available for ductile iron pipe?: There are several different types of valves available for ductile iron pipe, each serving a specific purpose and function. Some of the most common types of valves used with ductile iron pipe include: 1. Gate Valves: These valves are used to either completely open or close the flow of fluid within the pipe. They have a gate-like mechanism that either blocks or allows the passage of fluid when the valve is either fully open or fully closed. 2. Butterfly Valves: Butterfly valves are quarter-turn valves that use a circular disc as the closing mechanism. When the valve is open, the disc is parallel to the flow, allowing for minimal pressure drop. When the valve is closed, the disc is perpendicular to the flow, completely stopping the fluid. 3. Ball Valves: Ball valves have a spherical disc with a hole in the middle, known as a ball. When the valve is open, the ball is positioned in such a way that it allows fluid to flow through the hole. When the valve is closed, the ball is rotated to block the flow. 4. Check Valves: Check valves are designed to allow fluid to flow in one direction only, preventing backflow. They have a flap or a disc that opens when the flow is in the correct direction, and closes to stop the flow when it tries to reverse. 5. Plug Valves: Plug valves have a cylindrical or conical plug with a hole through it that can be rotated to control the flow. When the valve is open, the hole aligns with the pipe, allowing fluid to pass through. When the valve is closed, the hole is perpendicular to the pipe, blocking the flow. 6. Pressure Reducing Valves: These valves are used to control and reduce the pressure of fluid flowing through the pipe. They have a mechanism that adjusts the flow area, allowing for pressure reduction. 7. Pressure Sustaining Valves: Pressure sustaining valves are used to maintain a specific pressure within the pipe. They automatically adjust the flow area to sustain the desired pressure level. 8. Air Release Valves: Air release valves are used to release air trapped within the pipe. They allow air to escape while preventing fluid from leaking out. These are just a few examples of the different types of valves available for ductile iron pipe. The choice of valve depends on the specific application, flow requirements, and desired functionality.

Q: Ductile iron pipe joint leakage: After cleaning the pipe mouth, the cf-2000 high efficiency composite waterproof agent is used to seal it, and it will not leak.

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