DUCTILE IRON PIPE DN400 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:Ductile iron gears are generally treated without heat treatment: Heat treatment must be necessary, generally annealed first to machine, after quenching or nitriding treatment

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:Why is the sound speed of nodular cast iron lowered after heat treatment?: After the heat treatment, the microstructure of the material changes, the graphite changes, eliminating the internal stress of molecules, thus slowing down the speed.

Q:Can the underground cast iron pipes be connected with clamps to form buttress?: The hoop has the advantages of beautiful appearance, convenient operation, strong clamping force, good sealing performance, etc.. Mainly used for connecting and fastening vehicle, ship, diesel engine, gasoline engine, machine tools, fire, and other machinery and equipment, chemical equipment general nylon hose, plastic hose, hose cloth, water interface and seal etc..

Q:How do ductile iron pipes handle ground settlement near construction sites?: Ductile iron pipes are highly resilient and can withstand ground settlement near construction sites. Due to their flexible nature, these pipes can accommodate small movements and settlement without incurring significant damage or failure. The ductility of the material allows the pipes to bend and adjust to the changing ground conditions, ensuring their integrity and minimizing the risk of leaks or breakage. Additionally, the strong and durable properties of ductile iron make it a reliable choice for underground infrastructure, providing long-term stability even in challenging environments.

Q:Can ductile iron pipes be used for trenchless installation methods?: Yes, ductile iron pipes can be used for trenchless installation methods. Trenchless installation methods are techniques used to install underground pipes without the need for extensive digging or trenching. Ductile iron pipes are a strong and durable choice for these methods due to their high tensile strength and flexibility. They can be installed using various trenchless techniques such as horizontal directional drilling (HDD), pipe bursting, and slip lining. These methods allow for efficient and cost-effective installation of ductile iron pipes without disrupting the surrounding environment. Additionally, the corrosion resistance of ductile iron pipes makes them suitable for trenchless installations in various soil conditions and environments.

Q:Can ductile iron pipes be used in areas with high soil erosion?: Ductile iron pipes, due to their inherent strength and durability, can be used in areas with high soil erosion. Ductile iron is a type of iron that has been treated with graphite nodules, which enhances its flexibility and tensile strength. This makes it highly resistant to cracking and breaking, even under extreme conditions. In areas with high soil erosion, the ground is prone to shifting and movement, which can put significant stress on underground pipes. However, ductile iron pipes have a high resistance to external loading and can withstand the pressures exerted by the surrounding soil. They have been extensively tested and proven to be reliable in such environments. Furthermore, ductile iron pipes have a long lifespan, often exceeding 100 years, which makes them a cost-effective choice for areas with high soil erosion. Their corrosion resistance and structural integrity make them suitable for installation in various soil conditions, including those prone to erosion. It is important to note that proper installation techniques, such as using suitable bedding and backfill materials, should be followed to ensure the optimal performance of ductile iron pipes in areas with high soil erosion. Additionally, regular inspection and maintenance should be conducted to identify any potential issues early on and prevent any damage caused by soil erosion. Overall, ductile iron pipes are a reliable and durable option for areas with high soil erosion, providing long-lasting and efficient water distribution and wastewater management systems.

Q:Are ductile iron pipes suitable for use in mining tailings pipelines?: Yes, ductile iron pipes are suitable for use in mining tailings pipelines. Ductile iron has excellent strength and durability properties, making it capable of withstanding the high pressure and abrasive nature of tailings. Furthermore, its corrosion resistance and ability to withstand harsh environmental conditions make it a reliable choice for mining applications.

Q:Can ductile iron pipes be used in potable water systems?: Yes, ductile iron pipes can be used in potable water systems. Ductile iron is a type of cast iron that has enhanced strength and ductility. It is a common material choice for water infrastructure, including potable water systems, due to its durability, resistance to corrosion, and long service life. Ductile iron pipes are manufactured to meet specific standards and regulations for potable water usage, ensuring that they are safe for transporting drinking water. Additionally, ductile iron pipes have excellent flow characteristics, making them suitable for water distribution systems. Overall, ductile iron pipes are a reliable and commonly used material in potable water systems.

Q:What are the different joint restraint systems available for ductile iron pipe?: Ductile iron pipe offers several options for joint restraint systems. These systems aim to prevent movement and separation at the pipe joints, ensuring a secure and leak-free connection. The commonly used joint restraint systems for ductile iron pipe include the following: 1. Mechanical Joint Restraint: This system involves a joint adapter and a restraining gland. The joint adapter is bolted to the pipe, while the restraining gland is bolted to the adjacent pipe or structure, preventing any movement. 2. Push-on Joint Restraint: This system uses a push-on joint along with a restraining gland that is bolted to the pipe or structure. The gland grips the pipe, providing axial restraint and preventing movement. 3. Flex-Ring Joint Restraint: This system employs a flexible rubber ring installed inside the pipe's bell. The ring expands against the pipe, ensuring a tight and secure connection by providing radial restraint. 4. Harness Joint Restraint: This system includes a harness wrapped around the pipe and connected to a restraining gland. The harness offers both axial and radial restraint, keeping the pipe in place. 5. Grip-Lock Joint Restraint: This system involves a wedge-shaped restraint inserted into the pipe's bell. The wedge expands and locks into place, providing both axial and radial restraint. 6. Restrained Joint System: This system combines mechanical and flexible joint restraints. It typically includes a mechanical joint adapter, a flexible joint restraint, and a restraining gland, offering both axial and radial restraint. Engineers typically specify these joint restraint systems based on factors like pipe diameter, operating pressure, and soil conditions. Each system has its own advantages and limitations, and the selection depends on the specific project needs and constraints.

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