DUCTILE IRON PIPE DN350 K8

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 20 m.t.

Supply Capability:: -

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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

Our main material are all carbon steel and alloy steel.

Q: How do ductile iron pipes perform in sandy soil conditions?: Ductile iron pipes perform well in sandy soil conditions due to their inherent strength and durability. The material's high tensile strength allows it to withstand the pressure exerted by the surrounding soil, preventing pipe deformation and breakage. Additionally, the corrosion resistance of ductile iron ensures a longer lifespan, even in corrosive sandy soil environments.

Q: Are ductile iron pipes resistant to soil movement?: Indeed, soil movement poses no threat to ductile iron pipes. These pipes boast an impressive tensile strength, enabling them to withstand external forces like soil movement. Specifically engineered for flexibility, they possess the ability to absorb and distribute stresses stemming from ground settlement or other soil movements. Moreover, their robust construction allows them to resist the compressive forces exerted by the surrounding soil. Consequently, ductile iron pipes represent a dependable and enduring option for underground pipelines, ensuring long-term stability and safeguarding against soil movement.

Q: How are ductile iron pipes manufactured?: Ductile iron pipes are produced using a technique called centrifugal casting, which employs a spinning mold. The process commences with the selection and preparation of top-notch ductile iron, a form of cast iron containing small quantities of magnesium to enhance its strength and ductility. Initially, the ductile iron is melted in a furnace at exceedingly high temperatures. Once the molten iron attains the desired temperature, it is poured into a rotating mold. Shaped like a pipe, the mold spins at a high speed, ensuring even distribution of the molten iron along its inner surface. While the mold spins, the molten iron cools and solidifies against the mold walls. This swift cooling leads to the formation of a fine-grained structure, thereby augmenting the mechanical properties of the pipe, including its strength and durability. The spinning mold continues to rotate until the pipe solidifies completely, typically within a few minutes. Upon solidification, the pipe is extracted from the mold and any excess material, referred to as the "skin," is eliminated. Typically, machining or grinding is employed to remove the skin, achieving the desired dimensions and surface finish. Subsequently, the pipe undergoes heat treatment to further enhance its mechanical properties and alleviate internal stresses. After the completion of heat treatment, the pipe undergoes a thorough inspection to identify any defects or imperfections. This inspection encompasses visual examinations, non-destructive testing methods, and pressure testing to ensure compliance with the required specifications and standards. If any defects are detected, the severity of the issue determines whether the pipe undergoes repair or is rejected. Lastly, the pipes are coated with a protective layer to prevent corrosion and extend their lifespan. This protective coating can be applied through various methods, such as cement mortar lining, epoxy coating, or zinc coating. In summary, the manufacturing process of ductile iron pipes encompasses iron melting, centrifugal casting, cooling, skin removal, heat treatment, inspection, and coating. This process guarantees the production of high-quality pipes characterized by exceptional strength, durability, and resistance to corrosion.

Q: Are ductile iron pipes suitable for installation in areas with high traffic loads?: Ductile iron pipes are indeed suitable for installation in areas characterized by heavy traffic loads. The reason behind this lies in the remarkable strength and durability of ductile iron, rendering it an optimal selection for situations involving substantial loads and consistent traffic. This material possesses outstanding resistance to impact and can endure heavy loads without succumbing to cracks or fractures. Furthermore, ductile iron pipes boast a notable capacity for bearing heavy loads, enabling them to effectively withstand the weight and pressure imposed by vehicles and other weighty machinery. Consequently, these pipes find widespread utilization in locations such as highways, roads, bridges, and other regions experiencing significant traffic volumes.

Q: What is the expected cyclic fatigue life of ductile iron pipes?: The expected cyclic fatigue life of ductile iron pipes can vary depending on several factors such as material composition, pipe design, loading conditions, and environmental factors. However, ductile iron pipes are generally known for their excellent fatigue resistance. Ductile iron pipes are designed to withstand cyclic loading, which is commonly experienced in water distribution and sewer systems due to fluctuating pressures and vibrations. These pipes have a unique microstructure that provides high strength and ductility, allowing them to resist the formation and growth of cracks under cyclic loading. Several studies and industry standards have provided estimates for the expected cyclic fatigue life of ductile iron pipes. The American Water Works Association (AWWA) C151 standard, for example, recommends a design life of 100 years for ductile iron pipes used in water distribution systems, indicating their long-term durability and fatigue resistance. Furthermore, research studies have shown that ductile iron pipes can withstand over 1 million cycles of loading without any signs of fatigue failure. The fatigue strength of ductile iron pipes can be further enhanced by using protective coatings or linings to minimize the effects of corrosion and abrasion. However, it is important to note that the expected cyclic fatigue life of ductile iron pipes can be influenced by various factors such as the quality of manufacturing, installation practices, and maintenance procedures. Regular inspections, proper handling, and adherence to recommended installation guidelines can help ensure the longevity and performance of ductile iron pipes. In summary, while the expected cyclic fatigue life of ductile iron pipes can vary depending on several factors, these pipes are generally known for their excellent fatigue resistance and can provide a long-term and reliable solution for water distribution and sewer systems.

Q: Are ductile iron pipes available for cutting and are there any relevant specifications?: Can be cut, the specification is based on the original specification, just for some engineering needs

Q: Why does the construction wastewater system use ductile iron pipes instead of galvanized steel tubes?: The cost is low, the construction cost is low, and the schedule is fast. Such as PVC, PE double wall corrugated pipes, etc..

Q: Can ductile iron pipes be used for both water and sewer applications?: Ductile iron pipes are versatile and can be utilized for water and sewer purposes. These pipes exhibit remarkable durability and exceptional corrosion resistance, rendering them appropriate for transporting both drinkable water and wastewater. Furthermore, they possess the ability to endure high pressure and resist external loads, making them a perfect fit for underground installations. Additionally, these pipes boast a lengthy lifespan and necessitate minimal upkeep, thereby offering a cost-effective option for water and sewer systems.

Q: Are there any limitations to the length of ductile iron pipe sections?: Limitations exist regarding the length of ductile iron pipe sections. Typically, these limitations stem from practical concerns such as transportation, installation, and handling. Longer pipe sections can present difficulties when it comes to transportation and maneuverability, particularly in areas with limited access or challenging terrain. Moreover, longer pipe sections may be more susceptible to damage during installation since proper alignment and joining can be more challenging. Manufacturing capabilities also impose limitations. Ductile iron pipes are typically produced in standard lengths, which can vary depending on the manufacturer and the specific application. These standard lengths are designed to strike a balance between transportation, installation, and overall pipe performance. In addition, longer pipe sections may pose challenges related to temperature variations and subsequent expansion and contraction. Ductile iron pipes are prone to thermal expansion and contraction, and longer sections may experience greater stress and strain as a result. Therefore, while there is no definitive maximum length for ductile iron pipe sections, practical considerations and manufacturing capabilities dictate the use of standard lengths that consider various factors such as transportation, installation, and performance.

Q: Can ductile iron pipes be used for wastewater treatment plants?: Indeed, ductile iron pipes have proven to be a viable option for wastewater treatment plants. Renowned for their robustness and endurance, these pipes are well-suited to endure the challenging and corrosive conditions present in such facilities. They possess the ability to withstand elevated pressures and exhibit resistance against corrosion, which is crucial for effectively managing wastewater and the diverse range of chemicals utilized in the treatment procedure. Additionally, ductile iron pipes offer the advantage of being effortless to install and maintain, ensuring an extended period of service. Consequently, they are frequently utilized in wastewater treatment plants for the transportation and distribution of wastewater across the entirety of the establishment.

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