DUCTILE IRON PIPES AND PIPE FITTINGS c25 DN900

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 m.t

Supply Capability:: 30000 m.t/month

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Material : Ductile Cast Iron
Size Range : DN 80mm to DN 2000mm
Unit Effective Length : 6m or 5.7m
Manufacture Standard: ISO 2531:1998/ EN 545:2006/EN 598:2007
Annual capacity : 200,000 tons
Coating Exterior: Zinc 130g/m2 according to ISO 8179-1 and bitumen coating 70 microns.
Cement Interior: Portland Cement/ High Alumina Cement/ Sulphate Resisting Cement Lining according to ISO 4179
Special requirements on external coating and internal lining can be applied
We also provide accessories such as SBR/EPDM rubber gaskets, lubricant paste, pipe caps, PE sleeves, etc.

Additional Parts:

Each pipe is strictly inspected according to related standard to ensure permanently high performance.
Easy Installation at site and service free for life
Long Service Lifespan
Quotation will arrive you within 24hours once we get your inquiry.
We guarantee offering you a competitive price.
A copy of original inspection reports of pipes will be offered after shipment.
Photos of loading process will be sent to the customer after shipment effect.
We will follow-up the delivery progress after shipment effect and update to the customer on weekly basis.

Q: How are ductile iron pipes installed?: Ductile iron pipes are typically installed using the following method. First, the trench is excavated to the required depth and width. The bottom of the trench is then carefully leveled and compacted to provide a stable foundation. Next, a bedding material, usually a sand and gravel mixture, is placed at the bottom of the trench. This bedding material helps to support the pipe and distribute the load evenly. It also serves to protect the pipe from any sharp objects that may be present in the soil. Once the bedding is prepared, the ductile iron pipes are carefully lowered into the trench and aligned to the desired position. It is important to ensure that the pipes are properly aligned and have the correct slope for efficient water flow. After the pipes are in place, they are joined together using a mechanical joint or a push-on joint system. These joints are designed to provide a secure and leak-free connection between the pipes. The joints are typically sealed using rubber gaskets, which help to create a watertight seal. Once the pipes are joined, the trench is backfilled with the excavated soil, taking care to compact it in layers to prevent settlement. The backfilling process is usually done in stages to allow for proper compaction. Finally, the installation is completed by connecting the ductile iron pipes to the existing water supply system or other pipes using appropriate fittings and valves. Pressure testing may also be carried out to ensure the integrity of the installation. Overall, the installation of ductile iron pipes requires careful planning, proper alignment, and secure jointing to ensure a long-lasting and reliable water supply system.

Q: Can ductile iron pipes be used in areas with high levels of hydrogen sulfide gas and corrosion potential?: Before making a decision, it is important to take certain factors into consideration when considering the use of ductile iron pipes in areas with high levels of hydrogen sulfide gas and corrosion potential. Ductile iron pipes display a strong resistance to corrosion, particularly when they are adequately protected with external coatings and linings. This characteristic makes them appropriate for environments with moderate levels of hydrogen sulfide gas and corrosion potential. Nevertheless, in areas with exceedingly high levels of hydrogen sulfide gas and severe corrosion potential, alternative materials such as corrosion-resistant alloys or specially coated pipes may be more suitable. To determine the suitability of ductile iron pipes, conducting a thorough evaluation of the specific conditions in the area is crucial. Factors such as the concentration of hydrogen sulfide gas, the presence of other corrosive elements or chemicals, and the overall corrosiveness of the environment should be taken into account. Furthermore, consulting the local regulations and industry standards is essential to ensure compliance and safety. In conclusion, while ductile iron pipes can withstand moderate levels of hydrogen sulfide gas and corrosion potential, it is necessary to conduct a comprehensive assessment of the specific conditions. In areas with high levels of hydrogen sulfide gas and severe corrosion potential, consulting with experts in the field and considering alternative materials may be required.

Q: How is ductile iron pipe manufactured?: Ductile iron pipe is manufactured through a specific process known as centrifugal casting. The process starts with the melting of iron in a furnace, where specific elements such as carbon and silicon are added to achieve the desired properties. Once the iron is melted, it is poured into a spinning mold or a die that is rotating at a high speed. As the molten iron is poured into the rotating mold, centrifugal force pushes the liquid metal towards the inner surface of the mold. This force causes the metal to solidify from the outer surface inward. This results in a pipe with a dense outer layer and a more porous inner layer. The centrifugal casting process ensures that the pipe's outer surface is free from impurities and defects, ensuring its strength and durability. After the pipe has solidified, it is removed from the mold and undergoes further processing. The pipe is cleaned, excess material is trimmed off, and any surface imperfections are removed. It is then treated with a protective coating, such as zinc or epoxy, to enhance its corrosion resistance. The final step in the manufacturing process is quality control and testing. Ductile iron pipes are subjected to various tests to ensure they meet the required standards, including hydrostatic pressure testing, dimensional inspection, and internal and external coating inspection. In summary, ductile iron pipe is manufactured through the centrifugal casting process, which involves melting iron, pouring it into a rotating mold, and allowing it to solidify under centrifugal force. The resulting pipe is then cleaned, coated, and undergoes rigorous quality control to ensure its strength, durability, and adherence to standards.

Q: How do ductile iron pipes handle internal scale buildup?: Ductile iron pipes possess exceptional resistance to the accumulation of internal scale, making them highly regarded. The material utilized in these pipes displays remarkable resistance to corrosion, effectively hindering the formation of scale deposits. Moreover, the pipes' sleek internal surface considerably reduces the likelihood of scale adherence. In the unlikely event that scale does commence its formation, ductile iron pipes handle it proficiently. The inherent robustness and durability of ductile iron enable it to withstand the pressure exerted by scale buildup. Consequently, the pipes can maintain efficient functionality, even in the presence of some internal scaling, thereby ensuring a dependable water flow. Nevertheless, it should be emphasized that regular maintenance and periodic cleaning remain imperative in order to prevent excessive accumulation of scale and ensure optimal pipe performance. This can be achieved through a variety of methods, including mechanical cleaning, chemical treatments, or high-pressure water jetting. By adhering to proper maintenance practices, the lifespan of ductile iron pipes can be prolonged, while minimizing any potential issues associated with internal scale buildup.

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: Are ductile iron pipes suitable for airport runway drainage?: Yes, ductile iron pipes are suitable for airport runway drainage. Ductile iron pipes are known for their durability, strength, and resistance to corrosion, making them an ideal choice for handling heavy loads and withstanding harsh environmental conditions typically found on airport runways.

Q: Can centrifugal cast iron pipe be galvanized or coated with asphalt which is good for corrosion prevention?: The centrifugal ductile iron pipe has the advantages of zinc coating and asphalt coating, and it is used in combination with two. By spraying zinc and epoxy coal tar coating of ductile iron pipe wall (or epoxy resin paint, polyurethane, etc.) wall using Portland cement (or epoxy powder, epoxy, polyurethane, ceramics etc.) wall coating can effectively active substances in soil and the formation of an insoluble zinc salt protection tube, the internal coating can inhibit corrosion of pipe body fluid medium.

Q: How does ductile iron pipe compare to PVC pipe in terms of strength?: Generally, ductile iron pipe is considered stronger than PVC pipe due to its composition of iron and carbon, which provides it with high tensile strength and resistance to breakage. It is commonly utilized in heavy-duty applications like water mains, sewer lines, and industrial piping due to its ability to withstand high pressures. On the flip side, PVC pipe is manufactured using a plastic material known as polyvinyl chloride. While PVC pipe is lightweight and easy to handle, it lacks the strength of ductile iron pipe. It is typically used in low-pressure applications such as household plumbing, irrigation systems, and drainage pipes. When comparing the strength of ductile iron pipe to PVC pipe, the former has a greater capacity to handle heavy loads, endure ground movement, and resist damage from external factors like rocks or tree roots. Additionally, ductile iron pipe is more durable and has a longer lifespan in comparison to PVC pipe. However, it is important to consider that the choice between ductile iron pipe and PVC pipe ultimately depends on the specific requirements of the project. Factors such as cost, environmental conditions, ease of installation, and desired longevity should all be taken into account when determining the appropriate type of pipe to utilize.

Q: How are ductile iron pipes protected against stray electrical currents?: Ductile iron pipes, which are commonly used for water and sewer systems, are protected against stray electrical currents through a process known as cathodic protection. This method involves applying a low-voltage direct current (DC) to the pipes, which creates a protective electrical field around them. Cathodic protection is achieved by installing sacrificial anodes or impressed current systems near the ductile iron pipes. Sacrificial anodes, typically made of a more electrically active metal such as zinc or magnesium, are connected to the pipes and serve as the source of electrical current. These anodes corrode over time, sacrificing themselves to protect the pipes from corrosion due to stray electrical currents. Impressed current systems, on the other hand, utilize an external power source to supply the protective electrical current. Rectifiers are used to convert alternating current (AC) to direct current (DC) and the DC is then applied to the pipes through anodes. This method allows for more control over the amount of current being applied, ensuring optimal protection. In both cases, the electrical current flowing through the sacrificial anodes or impressed current systems creates a protective barrier around the ductile iron pipes. This barrier prevents the stray electrical currents from flowing through the pipes, reducing the risk of corrosion and extending the lifespan of the infrastructure. Regular monitoring and maintenance of the cathodic protection system are essential to ensure its effectiveness. This involves inspecting the anodes, checking the electrical current levels, and making any necessary adjustments or replacements to maintain the desired level of protection. Overall, cathodic protection is a reliable and widely used method to protect ductile iron pipes against stray electrical currents, safeguarding the integrity and longevity of water and sewer systems.