Ductile Iron Pipe DN80

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Loading Port:: Tianjin

Payment Terms:: TT or LC

Min Order Qty:: 23 m.t.

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Specifications

Quick Details

Place of Origin:	China (Mainland)	Brand Name:	CMAX	Model Number:	T type / K type / Flange type
Length:	6m / 5.7m / Negotiable	Standard:	ISO2531 / EN545 / EN598	Application:	Potable / Sewage water
Diameter:	DN80~DN2200	Shape:	Round	Hardness:	230
Pipe Wall Thickness:	standard	Pull Strength:	420	Yield (≥ MPa):	300
Material:	Ductile Iron	Type:	Centrifugal ductile cast iron pipe	Certification:	ISO2531 / EN545 / EN598
Outer Diameter:	80-2200	Thickness:	standard	Specification:	DN80~DN2200

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Ductile iron pipe is sized according to a dimensionless term known as the Pipe Size or Nominal Diameter (known by its French abbreviation, DN). This is roughly equivalent to the pipe's internal diameter in inches or millimeters. However, it is the external diameter of the pipe that is kept constant between changes in wall thickness, in order to maintain compatibility in joints and fittings. Consequently the internal diameter varies, sometimes significantly, from its nominal size. Nominal pipe sizes vary from 3 inches up to 64 inches, in increments of at least 1 inch, in the USA.

Pipe dimensions are standardised to the mutually incompatible AWWA C151 (U.S. Customary Units) in the USA, ISO 2531 / EN 545/598 (metric) in Europe, and AS/NZS 2280 (metric) in Australia and New Zealand. Although both metric, European and Australian are not compatible and pipes of identical nominal diameters have quite different dimensions.

Flanges are flat rings around the end of pipes which mate with an equivalent flange from another pipe, the two being held together by bolts usually passed through holes drilled through the flanges. A deformable gasket, usually elastomeric, placed between raised faces on the mating flanges provides the seal. Flanges are designed to a large number of specifications that differ because of dimensional variations in pipes sizes and pressure requirements, and because of independent standards development. In the U.S. flanges are either threaded or welded onto the pipe. In the European market flanges are usually welded on to the pipe. In the U.S. flanges are available in a standard 125 lb. bolt pattern as well as a 250 lb (and heavier) bolt pattern (steel bolt pattern). Both are usually rated at 250 psi (1,700 kPa). A flanged joint is rigid and can bear both tension and compression as well as a limited degree of shear and bending. It also can be dismantled after assembly. Due to the rigid nature of the joint and the risk of excessive bending moment being imposed, it is advised that flanged pipework is not buried.

Current flange standards used in the water industry are ANSI B16.1 in the USA, EN 1092 in Europe, and AS/NZS 4087 in Australia and New Zealand.

Ductile iron pipe is somewhat resistant to internal corrosion in potable water and less aggressive forms of sewage. However, even where pipe material loss and consequently pipe wall reduction is slow, the deposition of corrosion products on the internal pipe wall can reduce the effective internal diameter. A variety of linings are available to reduce or eliminate corrosion, including cement mortar, polyurethane and polyethylene. Of these, cement mortar lining is by far the most common.

Polyurethane (Plastic wrap) marginally protects piping made of ductile cast iron against corrosion and ensures meeting hygienic standards for drinking water at the same time in the early years. Polyurethane is used for both the inside lining and the outside coating. Because of polyurethane's elasticity, the coating remains intact even if the pipe is deformed. A major problem is that the poly wrap is not able to be uniformly installed or even installed without rips and creates isolated corrosion attacks. Corrosion Experts

Polyurethane coatings were first used in 1972.[citation needed] In comparison with other coatings, the internal polyurethane lining exhibits a high resistance to various different media such as drinking water, wastewater, de-mineralised water, industrial water and gas, as well as to aggressive solutions such as sulphuric acid. The polyurethane outside coating is suitable for all kinds of soil.

Polyurethane is a thermosetting plastic with no solvents, with a three-dimensionally linked molecular structure giving it mechanical stability. The polyurethane used for conating has the following standard properties, according to EN 545 and ISO 2531 standards.

Q: What are the different methods for joining ductile iron pipe?: There exists a variety of methods to join ductile iron pipe, each possessing its own advantages and limitations. One commonly utilized technique is the mechanical joint (MJ) coupling, where a rubber gasket, bolts, and nuts are employed to establish a watertight seal between pipe sections. This method is comparatively swift and straightforward to install, although it necessitates the expertise of a skilled technician to ensure proper alignment and bolt tightening to prevent leakage. Another approach is the flanged joint, which involves equipping the pipe ends with flanges that are fastened together using gaskets to form a secure seal. This method permits easy disassembly and reassembly of pipe sections, making it suitable for applications requiring frequent maintenance or alterations. However, it is more costly and time-consuming when compared to other methods. A widely employed method is the push-on joint (POJ), wherein a rubber gasket and a special lubricant are utilized to slide the pipe ends together. This technique yields a reliable and watertight seal, and installation is relatively rapid and simple. However, it necessitates proper alignment and cautiousness to prevent damage to the gasket during assembly. An alternative option is the restrained joint (RJ), which utilizes a mechanical joint coupling with additional features to resist axial forces or thrusts. This method is commonly employed in applications where the pipe is subjected to internal pressure, external loads, or seismic activity. It offers a secure and rigid connection but may require specialized tools and training for installation. Lastly, welding is another method for joining ductile iron pipe. This involves heating the pipe ends and melting a filler metal to create a permanent bond. Welding provides a strong and durable connection, but it demands skilled welders and additional time for preparation, welding, and cooling. It is often employed for specific applications, such as joining sections of pipe with different diameters or connecting to other materials. In conclusion, the various methods for joining ductile iron pipe encompass mechanical joint coupling, flanged joint, push-on joint, restrained joint, and welding. The selection of the method relies on factors such as application requirements, installation time, maintenance needs, and budget.

Q: What are ductile iron pipes?: Ductile iron pipes are a type of iron pipe that possess high tensile strength and flexibility. They are made by treating cast iron with trace amounts of magnesium to create a material that is stronger and more resilient than traditional cast iron pipes. The addition of magnesium changes the microstructure of the iron, resulting in a matrix of graphite nodules within the iron, hence the name "ductile iron". This unique structure gives ductile iron pipes their remarkable properties, making them highly resistant to cracking and breaking even under high pressure and extreme temperature conditions. Ductile iron pipes are commonly used in water and wastewater systems, as well as in various industrial applications, due to their durability, longevity, and ability to withstand external loadings. They are also known for their ease of installation and low maintenance requirements, making them a popular choice in the construction industry.

Q: How do ductile iron pipes perform in extreme weather conditions?: Ductile iron pipes have excellent performance in extreme weather conditions. Their high tensile strength and flexibility allow them to withstand freezing temperatures, heavy snow loads, and extreme heat without cracking or breaking. Additionally, their corrosion-resistant properties make them highly durable and reliable in harsh weather environments, ensuring long-term performance and minimal maintenance requirements.

Q: What are the different types of restrained joints for ductile iron pipe?: Some of the different types of restrained joints for ductile iron pipe include mechanical joints, push-on joints, and restrained push-on joints. Mechanical joints use bolts and gaskets to create a tight seal, while push-on joints rely on a rubber gasket to provide a secure connection. Restrained push-on joints incorporate additional features such as external restraints or wedges to prevent pipe movement.

Q: What is the expected pressure rating for ductile iron pipes?: The expected pressure rating for ductile iron pipes can vary depending on various factors such as the pipe diameter, wall thickness, and the specific application it is being used for. However, generally speaking, ductile iron pipes are designed and manufactured to withstand high-pressure conditions. They are commonly used in water and wastewater systems, where they can typically handle pressures ranging from 150 psi (pounds per square inch) up to 350 psi or even higher. It is important to consult the manufacturer's specifications or relevant industry standards for specific pressure ratings based on the pipe's size and application to ensure safe and reliable operation.

Q: Can ductile iron pipe be used for chemical processing plant applications?: Ductile iron pipe is indeed suitable for chemical processing plant applications. It is a type of cast iron that possesses enhanced properties, such as improved ductility and strength, enabling its use in various industrial settings, including chemical processing plants. Ductile iron pipes exhibit excellent corrosion resistance, can endure high temperatures and pressures, and can handle aggressive chemical substances. Moreover, they are easy to install and maintain, offering a cost-effective solution for chemical processing plants. Nonetheless, it is crucial to consider the specific requirements and conditions of the plant, and seek advice from specialists to ensure the suitability of the chosen piping materials for the particular chemical processes and substances involved.

Q: Are ductile iron pipes suitable for underground river crossings?: Indeed, underground river crossings can be facilitated by the use of ductile iron pipes. Ductile iron, being a robust and long-lasting material, can endure the external stresses and burdens encountered in such crossings. With its superb tensile strength, impact resistance, and durability, ductile iron is exceptionally well-suited for underground applications where the pipes may face elevated water pressure, ground displacement, or various environmental influences. Furthermore, ductile iron pipes possess an extended lifespan and are impervious to corrosion, a vital attribute when dealing with water crossings. Their capacity to withstand these circumstances renders them a dependable choice for underground river crossings.

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.

Q: How does ductile iron pipe handle thermal expansion and contraction?: Ductile iron pipe is able to handle thermal expansion and contraction effectively due to its inherent flexibility and strength. Its unique composition allows it to withstand the expansion and contraction caused by temperature fluctuations without breaking or becoming brittle. This property is crucial in preventing any damage to the pipe or its fittings, ensuring a reliable and durable pipeline system.

Q: Can ductile iron pipe be used for hydroelectric power generation?: Yes, ductile iron pipe can be used for hydroelectric power generation. Ductile iron pipes are known for their strength, durability, and resistance to corrosion, making them suitable for various applications including the transportation of water in hydroelectric power plants.

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