DUCTILE IRON PIPE DN1000 K8

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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 is the internal lining used in ductile iron pipes?: The internal lining used in ductile iron pipes is typically a cement mortar lining. This lining is applied to the inside surface of the pipe to protect it from corrosion and abrasion. The cement mortar lining helps to extend the lifespan of the pipes and ensures they can withstand the harsh conditions of transporting water or sewage. Additionally, the lining also improves the hydraulic efficiency of the pipes by reducing friction and preventing the formation of biofilms or deposits on the inner surface. Overall, the use of cement mortar lining in ductile iron pipes is essential for maintaining the integrity and functionality of the infrastructure.

Q: Are ductile iron pipes suitable for horizontal directional drilling (HDD) installations?: Ductile iron pipes are indeed suitable for horizontal directional drilling (HDD) installations. Renowned for their robustness and durability, ductile iron pipes prove to be an exceptional option for HDD projects. The process of HDD entails creating a horizontal tunnel underground and inserting a pipe through it. This can be quite challenging due to the immense forces exerted on the pipe during the installation. Nevertheless, ductile iron pipes have the capability to endure these forces and maintain their structural integrity, thus ensuring a successful HDD installation. Furthermore, ductile iron pipes possess outstanding resistance to corrosion, making them suitable for a wide range of soil and environmental conditions frequently encountered during HDD projects. In conclusion, ductile iron pipes possess the necessary characteristics to withstand the demanding conditions of HDD installations and remain a dependable choice for such applications.

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: What are the different coating thickness options for ductile iron pipe?: The coating thickness options available for ductile iron pipe can vary depending on the specific application and requirements. Typically, there are three commonly used coating thickness options for ductile iron pipe: 1. Standard Thickness: Normally, the coating thickness for ductile iron pipe falls within the range of 200 to 250 microns (8-10 mils). This thickness is generally sufficient to protect against corrosion and abrasion in most soil and water conditions. 2. Increased Thickness: In certain cases, when the pipe is exposed to more aggressive environments or requires a longer lifespan, it may be necessary to use a thicker coating. This can range from 300 to 500 microns (12-20 mils) or even more, depending on the specific requirements. 3. Specialized Coatings: For particularly demanding applications, specialized coatings may be utilized. These coatings offer even greater protection against corrosion, abrasion, or chemical exposure. The thickness of these specialized coatings can vary significantly depending on the specific coating material and application requirements. It is important to emphasize that the selection of coating thickness should be based on a comprehensive evaluation of the environmental conditions, intended lifespan, and any relevant industry standards or specifications. It is advisable to consult with a coating manufacturer or corrosion specialist to determine the appropriate coating thickness for a specific ductile iron pipe application.

Q: How does the white iron appear in the case of ductile iron?: The addition of 0.2% SiC in the raw iron water can effectively reduce the chill.

Q: Can ductile iron pipe be used for wastewater treatment plant sludge handling?: Yes, ductile iron pipe can be used for wastewater treatment plant sludge handling. Ductile iron pipe is a strong and durable material that is resistant to corrosion and can withstand the harsh conditions associated with sludge handling. It is commonly used in wastewater treatment plants for conveying sludge, as it provides excellent structural integrity and has a long service life. Additionally, ductile iron pipe is easy to install and maintain, making it a practical choice for sludge handling applications in wastewater treatment plants.

Q: What are the advantages of using ductile iron pipe?: There are several advantages of using ductile iron pipe. Firstly, it has a high tensile strength, allowing it to withstand high-pressure conditions without deformation or bursting. Secondly, it has excellent corrosion resistance, making it suitable for use in various environments, including underground and underwater applications. Additionally, ductile iron pipe is highly durable and long-lasting, reducing the need for frequent replacements. It is also resistant to fire and has good seismic performance. Lastly, ductile iron pipe offers easy installation and maintenance due to its flexibility and adaptability.

Q: What are the different types of joints used in ductile iron pipes?: There are several types of joints commonly used in ductile iron pipes. These joints are designed to provide a secure and leak-proof connection between pipe sections. Here are some of the most commonly used joint types: 1. Push-on joint: This type of joint is easy to install and requires no special tools. It involves lubricating the gasket on one end of the pipe and pushing it into the socket of the adjoining pipe. The gasket creates a tight seal that prevents leakage. 2. Mechanical joint: This joint type consists of a gland and a follower gasket. The gland is placed over the spigot end of one pipe, and the follower gasket is inserted into the bell end of the adjoining pipe. The gland is then tightened with bolts and nuts, compressing the gasket to form a secure joint. 3. Restrained joint: This joint is used in applications where pipes need to be restrained against axial movement or pressure thrust. It typically involves a mechanical joint with additional components such as tie rods, thrust blocks, or restrained couplings to provide the necessary restraint. 4. Flanged joint: Flanged joints are commonly used in large diameter ductile iron pipes. They involve a flange on one pipe end and a mating flange on the other pipe end. The two flanges are bolted together, creating a strong and secure connection. Flanged joints allow for easy disassembly and reassembly if needed. 5. Welded joint: Welded joints are created by fusing the ends of two pipes together using heat and pressure. This type of joint provides a permanent and strong connection. Welded joints are commonly used in underground or buried applications where long-term durability is essential. It is important to note that the choice of joint type depends on factors such as pipe diameter, application, and project requirements. Consulting with a professional engineer or the manufacturer's guidelines is recommended to ensure the appropriate joint type is selected for ductile iron pipes.

Q: Can ductile iron pipe be recycled?: Yes, ductile iron pipe can be recycled. It is a highly recyclable material that can be melted down and reused in the production of new ductile iron products. Recycling ductile iron pipe helps reduce waste and conserves natural resources.

Q: Can ductile iron pipes be used for firefighting systems?: Yes, ductile iron pipes can be used for firefighting systems. Ductile iron pipes are known for their strength, durability, and ability to withstand high pressure. They are commonly used in various applications, including firefighting systems, due to their resistance to corrosion and their ability to handle the flow of water efficiently.

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