DUCTILE IRON PIPE DN300 K8/C/K9 System 1

DUCTILE IRON PIPE DN300 K8/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:Can ductile iron pipes be used in areas with high levels of hydrogen sulfide gas?: Yes, ductile iron pipes can be used in areas with high levels of hydrogen sulfide gas. Ductile iron pipes have a high corrosion resistance, which makes them suitable for such environments. Additionally, they have been successfully used in sewage systems and wastewater treatment plants where hydrogen sulfide gas is commonly present.

Q:Can ductile iron pipes be used for underground hydropower systems?: Indeed, underground hydropower systems can utilize ductile iron pipes. Renowned for their robustness and endurance, ductile iron pipes are apt for a wide range of purposes, including subterranean installations. With remarkable resistance against corrosion and the ability to withstand intense pressure, they are exceptionally suited for transporting water in hydropower systems. Furthermore, ductile iron pipes boast a lengthy lifespan, diminishing the necessity for frequent replacements and reducing maintenance expenses. Moreover, they exhibit excellent joint integrity, guaranteeing leak-free connections beneath the surface. Thus, ductile iron pipes emerge as a dependable option for underground hydropower systems.

Q:What are the common pressure ratings for ductile iron pipes?: Common pressure ratings for ductile iron pipes vary depending on the specific application and industry standards. However, the most commonly used pressure ratings for ductile iron pipes are Class 150, Class 200, Class 250, and Class 350. Class 150 ductile iron pipes are typically used for low-pressure applications, with a working pressure of up to 150 psi (pounds per square inch). These pipes are commonly used for water distribution systems, irrigation, and gravity flow sewer systems. Class 200 ductile iron pipes have a higher working pressure of up to 200 psi. These pipes are often used for applications that require a slightly higher pressure, such as industrial water supply, fire protection systems, and wastewater treatment plants. Class 250 ductile iron pipes have a working pressure of up to 250 psi. These pipes are suitable for more demanding applications, such as high-pressure water supply systems, power plants, and municipal water distribution networks. Class 350 ductile iron pipes have the highest working pressure rating, with a maximum pressure of up to 350 psi. These pipes are typically used for heavy-duty applications, such as industrial water supply, oil and gas pipelines, and large-scale water transportation projects. It's important to note that these pressure ratings are general guidelines and may vary depending on the specific manufacturer and product specifications. Consulting industry standards and guidelines, as well as working with qualified engineers and professionals, is essential to ensure the correct pressure rating is selected for a particular ductile iron pipe application.

Q:Can ductile iron pipes be used in areas with high soil settlement?: Ductile iron pipes are suitable for areas with high soil settlement due to their strength and durability. They can withstand external loads and ground movement, making them an ideal choice for such areas. Additionally, these pipes have a high resistance to corrosion, making them even more suitable for use in areas with high soil settlement. However, it is important to consider factors such as proper installation techniques, appropriate bedding and backfill materials, and regular maintenance to ensure the longevity and performance of the ductile iron pipes in these areas. Consulting with a qualified engineer or pipe manufacturer can provide more specific guidance based on the site's conditions and requirements.

Q:What pipe can be used to replace the cast iron pipe in the water supply? Thank you: According to the casting method, it is divided into continuous cast iron pipe and centrifugal cast iron pipe, in which the centrifugal cast iron pipe is divided into sand mould and metal type two kinds. Divided into gray cast iron pipe and nodular cast iron pipe according to different material. According to the interface form, it is divided into flexible interface, flange interface, self anchored interface, rigid interface and so on. Among them, the flexible iron pipes rubber sealing ring; flange interface cast iron pipe flange fixed in the rubber pad, the flange gasket sealing; rigid interface cast iron pipe socket is large, straight pipe is inserted, sealed with cement, this technology has been basically eliminated.

Q:How are ductile iron pipes protected against freeze-thaw cycles?: Several measures are taken to protect ductile iron pipes from freeze-thaw cycles. Firstly, the material used in these pipes is naturally resistant to low temperatures, allowing them to withstand freezing conditions without becoming brittle or prone to cracking. Furthermore, a protective layer such as cement mortar lining or polyethylene encasement is often applied to the pipes. This extra barrier helps insulate the pipe and prevents direct contact between the iron and the surrounding environment, reducing the risk of freeze-thaw damage. Moreover, ductile iron pipes are designed with joints that allow for movement and flexibility. This design feature helps accommodate any expansion or contraction that may occur during freeze-thaw cycles, minimizing the risk of pipe breakage or damage caused by freezing water pressure. Proper installation practices, including sufficient bedding and backfilling, are also crucial in protecting ductile iron pipes from freeze-thaw cycles. Adequate support and suitable materials surrounding the pipes help minimize the impact of freezing temperatures on the structural integrity of the pipes. Regular inspection and maintenance of ductile iron pipes are essential for identifying any potential issues resulting from freeze-thaw cycles. Periodic assessments can detect signs of damage or deterioration, allowing for timely repairs or replacement to prevent further damage. In conclusion, ductile iron pipes are safeguarded against freeze-thaw cycles through the material's inherent resistance, protective coatings, flexible joints, proper installation practices, and regular maintenance. These measures collectively ensure the durability and longevity of ductile iron pipes, even in cold weather conditions.

Q:How are ductile iron pipes protected against stray current corrosion?: Ductile iron pipes are protected against stray current corrosion through the implementation of various preventive measures and protective coatings. Stray current corrosion occurs when an electric current passes through the pipe, leading to accelerated corrosion and potential damage. To prevent this, the following measures are typically adopted: 1. Electrical isolation: Ductile iron pipes are electrically isolated from other metallic structures using insulating materials, such as rubber gaskets or non-conductive coatings. This isolation prevents the flow of stray current through the pipe, minimizing the risk of corrosion. 2. Cathodic protection: Cathodic protection is a widely used technique to protect ductile iron pipes from stray current corrosion. It involves the installation of sacrificial anodes or impressed current systems near the pipe. These anodes or systems release a controlled electric current, which counteracts the stray current and ensures that the iron pipe remains cathodically protected. 3. Coatings: Ductile iron pipes are typically coated with protective layers to enhance their resistance against corrosion. One common coating is a fusion-bonded epoxy (FBE) coating, which provides a high level of protection against stray current corrosion. FBE coatings act as a barrier, preventing the electrical contact between the pipe and the surrounding environment. 4. Monitoring and maintenance: Regular monitoring and maintenance are essential to ensure the ongoing protection of ductile iron pipes against stray current corrosion. This involves inspecting the protective coatings for any damage or degradation and promptly repairing or replacing them as needed. Additionally, monitoring systems can be installed to detect and measure stray currents, allowing for timely intervention if necessary. By implementing these protection measures, ductile iron pipes can effectively guard against stray current corrosion, prolonging their lifespan and ensuring the integrity of the pipeline infrastructure.

Q:Can ductile iron pipe be used for desalination plants?: Certainly, desalination plants can utilize ductile iron pipe. Ductile iron, a robust and enduring material, has found extensive application across various industries, notably in water and wastewater treatment facilities. It boasts exceptional resistance against corrosion, remarkable tensile strength, and the ability to withstand external loads and pressures. Consequently, it proves ideal for conveying water and other fluids within desalination plants, where the presence of high salt concentration and other corrosive elements prevails. Furthermore, ductile iron pipes are renowned for their prolonged service life and minimal maintenance demands, rendering them advantageous to desalination plants that operate continuously and necessitate a dependable and efficient piping system.

Q:What is the expected internal lining material for ductile iron pipes?: The expected internal lining material for ductile iron pipes is typically cement mortar or polyethylene.

Q:There are several forms of flexible interfaces for Spigot Cast Iron Pipes: Socket type cast iron pipe rigid interface antiallergic can, under the action of external force, no tower water supply equipment interface packing easy fragmentation and leakage, especially in the weak foundation and uneven subsidence area and the earthquake zone. The interface damage rate is higher. Therefore, flexible interfaces should be adopted under the above unfavorable conditions.

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