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 different lining materials available for ductile iron pipe?: Ductile iron pipes have multiple options for lining materials, which serve to safeguard the pipes from corrosion and prolong their lifespan. Some commonly used lining materials are as follows: 1. Cement Mortar Lining: This lining comprises a layer of cement mortar applied to the inner surface of the pipe. It serves as a durable and smooth barrier against corrosion, making it a popular choice for water and wastewater applications. 2. Polyethylene Encasement: In this method, the pipe is wrapped with a layer of polyethylene film. This lining delivers excellent protection against corrosion and is frequently employed in aggressive soil conditions. 3. Polyurethane Lining: Polyurethane lining is a spray-applied substance that forms a seamless and flexible barrier within the pipe. It offers exceptional resistance to chemicals and abrasion, making it suitable for applications involving aggressive fluids. 4. Epoxy Lining: Epoxy lining is widely chosen for lining ductile iron pipes due to its outstanding resistance to corrosion and chemicals. It is typically applied as a liquid coating that cures to form a protective and smooth layer. 5. Zinc Coating: Zinc coating, also known as galvanizing, involves applying a layer of zinc to the external surface of the pipe. This lining provides corrosion resistance and is commonly utilized in outdoor and exposed applications. These diverse lining materials offer distinct advantages and are selected based on the specific requirements of the application. Factors such as the nature of the transported fluid, environmental conditions, and expected service life play a crucial role in determining the most suitable lining material for ductile iron pipes.

Q:What are the different types of joints available for ductile iron pipe?: There are three main types of joints available for ductile iron pipe: push-on joints, mechanical joints, and restrained joints. Push-on joints use a rubber gasket that is compressed to create a watertight seal. Mechanical joints consist of a gland and a follower that are connected with bolts and nuts to create a leak-proof joint. Restrained joints are designed to withstand internal pressure and external forces through the use of a key and gland system.

Q:How are ductile iron pipes joined to fittings and valves?: Ductile iron pipes are typically joined to fittings and valves using mechanical joint or push-on joint methods. The mechanical joint involves using a gland and a rubber gasket to create a tight seal when the pipe is bolted to the fitting or valve. On the other hand, push-on joint method uses a rubber gasket that is compressed when the pipe is pushed into the fitting or valve, providing a secure connection without the need for bolts or additional hardware.

Q:How are ductile iron pipes protected against internal corrosion?: Ductile iron pipes are protected against internal corrosion through a process called cement mortar lining. This involves applying a layer of cement mortar to the inner surface of the pipe, creating a protective barrier between the iron and the water flowing through it. This lining helps to prevent the formation of rust, corrosion, and scale build-up, ensuring the longevity and durability of the pipes.

Q:Are ductile iron pipes suitable for industrial applications?: Yes, ductile iron pipes are suitable for industrial applications. Due to their excellent strength, durability, and resistance to corrosion, ductile iron pipes are commonly used in industrial settings such as water and wastewater treatment plants, power plants, and chemical processing plants. They can handle high-pressure systems, have a long service life, and are cost-effective, making them a reliable choice for various industrial applications.

Q:What is the typical pressure rating of ductile iron pipes?: The typical pressure rating of ductile iron pipes varies depending on the application and the size of the pipe. However, ductile iron pipes are generally designed and manufactured to withstand high pressure levels. In water and wastewater systems, for example, ductile iron pipes typically have a pressure rating of 250 psi (pounds per square inch) or higher. For larger pipes used in industrial applications, such as oil and gas pipelines, the pressure rating can be even higher, ranging from 350 psi to 500 psi or more. It is important to consult the specific manufacturer's specifications and industry standards to determine the precise pressure rating for a particular ductile iron pipe.

Q:How is ductile iron pipe installed?: Ductile iron pipe is typically installed using the trenchless method, which involves three main steps: preparation, installation, and backfilling. First, the trench is excavated and prepared with a proper foundation for the pipe. Then, the ductile iron pipe is carefully lowered into the trench using specialized equipment and joined together using mechanical joints or flanged connections. Finally, the trench is backfilled with suitable material and compacted to provide stability and support to the installed pipe.

Q:How does ductile iron pipe perform in areas with high soil erosion?: Ductile iron pipe is known for its exceptional strength and durability, making it a reliable choice for areas with high soil erosion. Its unique composition, which includes graphite nodules, allows it to be both flexible and resistant to fractures or cracks, even in challenging environments. This makes ductile iron pipe highly capable of withstanding the impact of soil erosion. In areas with high soil erosion, the soil particles can scrape against the surface of the pipe, potentially causing abrasions or damage. However, ductile iron pipe's thick wall thickness and corrosion-resistant coating provide an effective barrier against these abrasive forces. This means that even in areas with significant soil erosion, ductile iron pipe can maintain its structural integrity and functionality. Moreover, ductile iron pipe's ability to resist corrosion further enhances its performance in areas with high soil erosion. Soil erosion often leads to an increased presence of moisture, which can accelerate the corrosion process of certain materials. However, ductile iron pipe's protective coating, typically made from zinc or epoxy, acts as a shield against corrosion, ensuring its long-term performance and reliability. In summary, ductile iron pipe demonstrates excellent performance in areas with high soil erosion due to its strength, flexibility, and resistance to fractures or cracks. Its thick wall thickness and corrosion-resistant coating make it highly durable against abrasive forces and corrosion, allowing it to withstand the challenges posed by soil erosion. As a result, ductile iron pipe is a dependable choice for infrastructure projects in such areas, providing long-lasting and efficient water and wastewater transportation systems.

Q:Can ductile iron pipes be used for underground wastewater outfalls?: Yes, ductile iron pipes can be used for underground wastewater outfalls. Ductile iron pipes are a popular choice for underground applications due to their durability, strength, and corrosion resistance. They are designed to withstand high pressure and external loading, making them suitable for transporting wastewater over long distances and depths. Additionally, ductile iron pipes have a smooth internal surface, which helps to minimize friction and prevent the buildup of sediments or debris that could potentially block the flow of wastewater. Therefore, ductile iron pipes are commonly used in underground wastewater systems, including outfalls, to ensure efficient and reliable wastewater transport while minimizing the risk of pipe failure or blockages.

Q:Can ductile iron pipes be used in tunneling or microtunneling projects?: Yes, ductile iron pipes can be used in tunneling or microtunneling projects. Ductile iron pipes are known for their durability, strength, and resistance to corrosion, making them suitable for underground applications. They can handle the pressure and load requirements of tunneling projects and provide reliable and long-lasting performance.

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