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: Can ductile iron pipe be used for horizontal directional drilling?: HDD, a trenchless method for installing underground utilities like pipelines, can indeed utilize ductile iron pipe. The choice of ductile iron pipe in HDD projects stems from its remarkable strength, durability, and ability to withstand the strains and stresses associated with directional drilling. It exhibits exceptional resistance to external loads and can endure the bending and pulling forces involved in HDD installations. Nevertheless, it is crucial to consider variables like pipe diameter, wall thickness, and soil conditions when selecting the appropriate pipe for HDD projects. Furthermore, it is imperative to adhere to proper installation techniques and take precautionary measures to ensure the long-term performance and integrity of ductile iron pipe in HDD applications.

Q: How are ductile iron pipes protected against external corrosion?: Ductile iron pipes are protected against external corrosion through a combination of manufacturing processes and external coatings. The first line of defense is the inherent corrosion resistance of ductile iron itself. The iron is treated with a special alloying element, typically magnesium, which forms a protective layer on the surface of the pipe. This layer acts as a barrier against corrosion and helps to extend the lifespan of the pipe. In addition to the corrosion-resistant properties of the iron, ductile iron pipes are also externally coated with protective materials. One common method is to apply a layer of asphaltic or bituminous coating to the pipe's surface. This coating acts as a barrier against moisture and corrosive substances in the soil, preventing them from coming into contact with the iron. It also provides a layer of insulation, reducing the likelihood of galvanic corrosion. Another method of external corrosion protection is the use of fusion-bonded epoxy (FBE) coatings. FBE is a thermosetting resin that is applied to the surface of the pipe and then heat-cured to form a strong and durable coating. This coating provides excellent resistance against corrosion, abrasion, and impact, making it a popular choice for ductile iron pipes in harsh environments. In some cases, additional protective measures such as cathodic protection systems may be employed. These systems use electric currents to counteract the corrosion process by supplying electrons to the pipe's surface. This helps to prevent corrosion from occurring, especially in areas where the coating may have been damaged or compromised. Regular maintenance and inspection are also crucial in ensuring the long-term protection of ductile iron pipes against external corrosion. This includes periodic cleaning, repair of any coating damages, and monitoring the integrity of the protective layers. Overall, the combination of the inherent corrosion resistance of ductile iron, external coatings, and maintenance practices ensures that ductile iron pipes are well-protected against external corrosion, allowing them to have a longer lifespan and deliver reliable performance in various applications.

Q: What are the different joint restraint systems available for ductile iron pipe?: There are several different joint restraint systems available for ductile iron pipe. These systems are designed to prevent movement and separation of the pipe at the joints, ensuring a secure and leak-free connection. Some of the common joint restraint systems for ductile iron pipe include: 1. Mechanical Joint Restraint: This system consists of a mechanical joint adapter and a restraining gland that provides axial restraint. 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: In this system, a push-on joint is used along with a restraining gland that is bolted to the pipe or structure. The gland provides axial restraint by gripping the pipe and preventing it from moving. 3. Flex-Ring Joint Restraint: This system utilizes a flexible rubber ring that is installed inside the pipe's bell. The ring provides radial restraint by expanding against the pipe, ensuring a tight and secure connection. 4. Harness Joint Restraint: This system consists of a harness that is wrapped around the pipe and connected to a restraining gland. The harness provides both axial and radial restraint, keeping the pipe in place and preventing any movement. 5. Grip-Lock Joint Restraint: This system utilizes a wedge-shaped restraint that is 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 incorporates a combination of mechanical and flexible joint restraints. It typically includes a mechanical joint adapter, a flexible joint restraint, and a restraining gland, providing both axial and radial restraint. These joint restraint systems are designed to meet specific application requirements and are often specified by engineers based on factors such as 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.

Q: Can ductile iron pipes be used in areas with high levels of organic matter in soil?: Yes, ductile iron pipes can be used in areas with high levels of organic matter in soil. Ductile iron pipes have excellent corrosion resistance, making them suitable for various soil conditions, including those with high levels of organic matter. They are resistant to chemical attacks and offer long-term durability, making them a reliable choice for such environments.

Q: What are the different types of fittings available for ductile iron pipe?: Ductile iron pipe offers a variety of fittings to accommodate different plumbing or piping systems. These fittings come in various configurations to connect, redirect, or branch off the pipe. One frequently used fitting is the flanged fitting, which has a flange or lip on one end for easy bolted connection to another flanged component. Flanged fittings are ideal for applications requiring a tight seal, such as water or sewage systems. Another option is the mechanical joint fitting, which utilizes a gasket and mechanical bolts to securely connect two pipe pieces. This type of fitting is often employed in underground water or sewer systems. Push-on fittings are also popular for ductile iron pipe. These fittings have a rubber gasket that is compressed onto the pipe, ensuring a watertight seal. They are quick and easy to install, making them perfect for applications where speed and efficiency are crucial. When a change in direction is necessary, ductile iron pipe fittings like elbows or bends are utilized. These fittings smoothly alter the pipe's direction without causing significant flow restrictions. Furthermore, saddle fittings are available for ductile iron pipe. These fittings create a branch connection on an existing pipeline without the need for cutting or welding. They are commonly used in irrigation or fire protection systems. In conclusion, the range of fittings for ductile iron pipe provides options to meet the specific requirements of different plumbing or piping systems. Whether it's flanged fittings for a tight seal, mechanical joint fittings for underground applications, push-on fittings for quick installation, or specialized fittings like elbows or saddle fittings, each type serves a specific purpose within the overall plumbing or piping system.

Q: What's the function of the cement mortar lining of ductile iron pipes?: In brief, the cement mortar lining system has the following advantages:1. provide active protection better than barrier coating2. meet both national and international standards for contact with potable water3. can be used in the strict requirements of the occasion4. strong and shock resistant5. suitable for a wide range of applications6. easy to repair7. over 100 years of service life

Q: What is the expected surge pressure rating of ductile iron pipes?: The expected surge pressure rating of ductile iron pipes can vary depending on factors such as pipe diameter, wall thickness, and application. However, generally speaking, ductile iron pipes have a surge pressure rating that ranges from 350 psi to 500 psi.

Q: Can ductile iron pipes be used for underground wastewater outfalls?: Yes, ductile iron pipes can be used for underground wastewater outfalls. Ductile iron is a strong and durable material that can withstand the harsh conditions of underground installations, making it suitable for transporting wastewater efficiently and reliably.

Q: What are the advantages of using ductile iron pipe?: There are several advantages of using ductile iron pipe in various applications. Firstly, ductile iron pipe is known for its exceptional strength and durability. It has a higher tensile strength and yield strength than other types of pipes, making it resistant to cracking, bending, and breaking. This strength allows it to withstand high-pressure and heavy-load conditions, making it ideal for applications such as water and sewage systems, oil and gas pipelines, and industrial piping. Secondly, ductile iron pipe has excellent corrosion resistance. It is coated with a protective layer, usually zinc or epoxy, which prevents rusting and corrosion. This coating ensures a longer lifespan for the pipe, even in harsh environments or when transporting corrosive fluids. Another advantage of ductile iron pipe is its flexibility. Unlike rigid pipes, ductile iron pipes have a certain degree of flexibility, allowing them to withstand ground movement and settle without breaking. This flexibility is particularly beneficial in areas prone to earthquakes or soil settlements. Additionally, ductile iron pipe has a smooth inner surface, which helps to minimize flow resistance and improve the efficiency of fluid transportation. It also reduces the likelihood of sediment buildup or corrosion on the pipe's interior, resulting in improved flow rates and reduced maintenance. Furthermore, ductile iron pipe is cost-effective in the long run. Although it may have a higher initial cost compared to other types of pipes, its durability and low maintenance requirements make it a more cost-effective choice over time. The extended lifespan of ductile iron pipe reduces the need for frequent replacements and repairs, resulting in lower overall life-cycle costs. Lastly, ductile iron pipe is environmentally friendly. It is made from recycled materials, and its long lifespan reduces the need for frequent replacements, thus reducing the carbon footprint associated with manufacturing and transportation. In conclusion, the advantages of using ductile iron pipe include its exceptional strength, corrosion resistance, flexibility, smooth inner surface, cost-effectiveness, and environmental friendliness. These qualities make it a reliable and preferred choice for a wide range of applications in various industries.

Q: How does ductile iron pipe handle thermal expansion and contraction?: The effectiveness of ductile iron pipe in dealing with thermal expansion and contraction is well-known. This is primarily due to its unique material properties and design characteristics. To begin with, it is worth noting that ductile iron pipe has a high coefficient of linear expansion. This means that it experiences relatively more expansion and contraction compared to other materials when exposed to temperature changes. As a result, the pipe is able to accommodate thermal expansion and contraction without causing excessive stress or deformation. Furthermore, the design of ductile iron pipes includes flexible joints. These joints, such as push-on or mechanical joints, are capable of absorbing the movement caused by thermal expansion and contraction. By providing a certain level of flexibility, these joints enable the pipe to expand and contract within a specific range without compromising its structural integrity. Additionally, the material composition of ductile iron itself plays a significant role in its ability to handle thermal expansion and contraction. Ductile iron is a type of cast iron alloy that contains nodular graphite in its microstructure. This composition provides the pipe with enhanced ductility and tensile strength. As a result, the pipe is able to withstand the stresses induced by thermal expansion and contraction without fracturing or breaking. Overall, ductile iron pipe is designed and produced in a manner that allows it to effectively deal with thermal expansion and contraction. Its high coefficient of linear expansion, flexible joints, and ductile material properties all work together to ensure that the pipe can accommodate temperature changes without causing any significant issues or structural failures.

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