DUCTILE IRON PIPE DN350

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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 suitable for installation in areas with high groundwater salinity?: Yes, ductile iron pipes are generally suitable for installation in areas with high groundwater salinity. Ductile iron is known for its corrosion resistance, making it a preferred choice in such environments. However, it is crucial to consider the specific salinity levels and consult with experts to ensure proper pipe coating and protection measures are in place to prevent any potential corrosion or degradation.

Q: What is the expected joint deflection capability of ductile iron pipes?: The expected joint deflection capability of ductile iron pipes is typically around 2 to 5 degrees per joint, allowing for flexibility and accommodating slight changes in alignment during installation and operation.

Q: Can ductile iron pipes be repaired if they are damaged?: Ductile iron pipes can undergo repairs if they sustain damage. The necessary repair method will depend on the extent of the damage. In instances where the pipe is cracked or has small holes, a repair clamp or a stainless-steel sleeve can be utilized to seal the affected area. These approaches offer a temporary solution, allowing water to continue flowing until a more permanent fix can be implemented. For more severe damage, such as significant cracks or broken segments, a complete replacement may be required. This process entails removing the damaged section of the pipe and installing a new piece. It is a specialized task that demands specific equipment and expertise, but it effectively restores the pipe's functionality. It is crucial to note that only trained professionals with experience in working with ductile iron should carry out the repairs. This ensures proper execution and safeguards the integrity and safety of the pipeline system. Regular inspection and maintenance of ductile iron pipes can aid in early detection of potential issues, preventing extensive damage that may necessitate replacement instead of repair.

Q: What are the advantages of using ductile iron pipes?: Using ductile iron pipes in various applications offers several advantages. To begin with, ductile iron pipes possess a high strength-to-weight ratio, making them a cost-effective option for transporting fluids or gases. They can endure high internal and external pressures, ensuring the dependable and efficient transportation of materials. Furthermore, ductile iron pipes exhibit exceptional corrosion resistance. They are impervious to rust and other forms of corrosion, expanding their lifespan and reducing maintenance expenses. This makes them suitable for underground and underwater applications where corrosive elements are present. Moreover, ductile iron pipes demonstrate superior ductility, enabling them to withstand heavy external loads and impacts without cracking or breaking. This renders them less vulnerable to damage during installation or exposure to harsh environmental conditions. In addition, ductile iron pipes possess excellent flow characteristics. Their smooth inner surface minimizes friction and pressure losses, resulting in efficient fluid flow and reduced pumping costs. This is particularly advantageous in applications requiring high flow rates or long-distance transportation. Additionally, ductile iron pipes are environmentally friendly. They are produced from recycled materials and can be recycled themselves, reducing the demand for raw materials and minimizing environmental impact. Furthermore, their prolonged service life diminishes the need for frequent replacements, further reducing waste generation. Lastly, ductile iron pipes offer versatile installation options. They can be installed using various techniques like trenchless methods, which minimize disruption to the surrounding environment and lower installation costs. Their adaptability and ease of installation make them a preferred choice for various construction projects. Overall, the benefits of utilizing ductile iron pipes encompass their high strength, corrosion resistance, ductility, flow characteristics, environmental friendliness, and versatile installation options. These factors establish them as a reliable and cost-effective choice for numerous applications in various industries.

Q: Can ductile iron pipe be used for geothermal heat exchange systems?: Indeed, geothermal heat exchange systems can utilize ductile iron pipe. Renowned for its robustness and resilience, ductile iron pipe is perfectly suited to withstand the elevated temperatures and pressures typically found in such systems. Moreover, its exceptional resistance to corrosion is of utmost importance in geothermal applications, where minerals and chemicals present in the earth can induce corrosion. Additionally, the commendable thermal conductivity of ductile iron pipe facilitates efficient heat transfer within geothermal systems. In conclusion, ductile iron pipe stands as a dependable and economical option for geothermal heat exchange systems.

Q: Can ductile iron pipes be used in areas with high temperature variations?: Yes, ductile iron pipes can be used in areas with high temperature variations. Ductile iron pipes have excellent thermal conductivity and can withstand a wide range of temperature fluctuations without losing their structural integrity. They have a high coefficient of linear expansion, which allows them to expand and contract with temperature changes without causing significant stress on the pipe. This makes ductile iron pipes suitable for use in areas where there are extreme temperature variations, such as hot summers and cold winters. Additionally, ductile iron pipes have a high resistance to thermal shock, meaning they can handle sudden temperature changes without cracking or breaking. Overall, ductile iron pipes are a reliable and durable choice for areas with high temperature variations.

Q: How do ductile iron pipes handle ground movement near rivers and lakes?: Due to their unique properties and construction, ductile iron pipes are an ideal choice for managing ground movement near rivers and lakes. These pipes, made from a type of cast iron known for its strength and flexibility, possess exceptional resistance to both ground movement and external forces. One notable characteristic of ductile iron pipes is their ability to endure bending and stretching without breaking. This remarkable flexibility enables the pipes to accommodate ground movements, whether caused by natural phenomena like soil settling, erosion, or even seismic activity. By absorbing and dispersing the stress induced by ground movement, these pipes minimize the risk of cracks or fractures. Moreover, ductile iron pipes exhibit high impact resistance, enabling them to withstand external forces such as pressure from shifting soil or heavy machinery. This quality makes them less susceptible to damage during ground movements in areas prone to erosion or flooding near rivers and lakes. Furthermore, ductile iron pipes feature smooth internal surfaces, reducing friction and resistance to the flow of water. This ensures efficient water transportation even in regions experiencing ground movement, preventing potential blockages or disruptions to the water supply system. To further enhance their ability to withstand ground movement, ductile iron pipes are commonly installed using flexible joints, such as restrained joints or push-on joints, depending on the specific project requirements. These joints allow the pipes to move slightly without causing harm to the overall system, providing additional protection against ground movement near rivers and lakes. In conclusion, ductile iron pipes possess the necessary strength, flexibility, impact resistance, and smooth internal surfaces to effectively manage ground movement near rivers and lakes. These qualities make them a reliable choice for water transportation systems in areas prone to ground movement, ensuring the creation of a durable and efficient infrastructure for the supply of water.

Q: Can ductile iron pipe be used for irrigation systems?: Indeed, irrigation systems can utilize ductile iron pipe. Ductile iron proves to be a robust and enduring substance capable of withstanding the demanding conditions of high pressure and continuous water flow necessary for these systems. Its resistance to corrosion renders it appropriate for subterranean applications where it may encounter moisture and soil. Furthermore, ductile iron pipes possess the advantage of being capable of supporting substantial loads, a crucial aspect for irrigation systems potentially relying on heavy machinery or vehicles. In conclusion, ductile iron pipe represents a dependable and enduring option for irrigation systems.

Q: How do ductile iron pipes handle ground movement in earthquake-prone areas?: Ductile iron pipes are known for their excellent resistance to ground movement, making them a reliable choice for earthquake-prone areas. These pipes are designed to withstand external forces, including the ground shifting and movement caused by seismic activities. The flexibility of ductile iron pipes allows them to absorb and distribute the energy generated during ground movement. This flexibility is achieved due to the unique composition of ductile iron, which includes nodular graphite in its microstructure. The nodular graphite provides ductility and resilience to the pipe, allowing it to deform under stress without fracturing. When an earthquake occurs and the ground starts to move, ductile iron pipes can adapt to the changing conditions. They have the ability to elongate, compress, and bend, thus reducing the risk of pipe failure. This characteristic is crucial in earthquake-prone areas, as it helps prevent catastrophic failures and water loss that can occur with more rigid pipe materials. Moreover, ductile iron pipes have a high level of joint integrity, which further enhances their ability to handle ground movement during seismic events. The joints of these pipes are designed to withstand lateral and angular movement, ensuring that they remain intact and leak-free. In addition to their inherent flexibility, ductile iron pipes are often installed using techniques that enhance their resistance to ground movement. Anchoring systems, such as thrust blocks and restraints, can be utilized to secure the pipes and prevent excessive movement. These systems help to stabilize the pipeline network and further minimize the potential for damage during earthquakes. Overall, the combination of ductility, joint integrity, and anchoring systems make ductile iron pipes a reliable choice for handling ground movement in earthquake-prone areas. They provide a durable and resilient solution that can withstand the challenges posed by seismic activities, ensuring the continuous supply of water and minimizing the risk of infrastructure damage.

Q: What is the disadvantage of nodular cast iron in excess of silicon?: Excessive silicon control results in the formation of nodular graphite in large cross section ductile iron and reduces the mechanical properties of castings.

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