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

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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 is the maximum pressure rating for ductile iron pipe?: The maximum pressure rating for ductile iron pipe typically ranges from 350 to 500 psi, depending on the diameter and wall thickness of the pipe. However, it is always recommended to consult the manufacturer's specifications for accurate and specific pressure ratings.

Q: Can ductile iron pipes be used in areas with high soil acidity?: Yes, ductile iron pipes can be used in areas with high soil acidity. Ductile iron is highly resistant to corrosion, including the effects of soil acidity, making it a suitable choice for such environments.

Q: How do ductile iron pipes handle ground settlement?: Due to their inherent flexibility and resistance to deformation, ductile iron pipes are highly effective in managing ground settlement. The exceptional qualities of ductile iron, such as its high tensile strength and elongation capacity, make it an ideal material for enduring ground movement. When ground settlement occurs, characterized by the downward shifting of soil or sediment, ductile iron pipes possess the capability to flex and adapt to the changing ground without fracturing. The pipes can absorb the stress caused by settlement and evenly distribute it along their length, minimizing the likelihood of cracks or breaks. Moreover, ductile iron pipes are constructed with a bell and spigot joint system, which permits slight movement and rotation at the joints. This characteristic allows the pipes to accommodate ground settlement by absorbing any misalignment or shifting of the surrounding soil. Furthermore, ductile iron pipes exhibit a greater load-bearing capacity than alternative materials like PVC or HDPE. This implies that they can endure heavier loads and pressures from the surrounding soil, reducing the possibility of pipe failure or collapse during ground settlement. In conclusion, ductile iron pipes are excellently equipped to handle ground settlement due to their flexibility, resistance to deformation, and ability to evenly distribute stress. Their unique properties ensure their ability to withstand the challenges presented by shifting ground conditions, making them a dependable choice for underground infrastructure projects.

Q: Do ductile iron pipes require special handling during transportation?: Yes, ductile iron pipes do require special handling during transportation. Ductile iron pipes are known for their strength and durability, but they can be susceptible to damage if not handled properly. These pipes are heavy and can be quite large in size, so it is important to use appropriate lifting and handling equipment during transportation. Special care should be taken to avoid dropping or impacting the pipes, as this can lead to cracks or fractures. Additionally, pipes should be stored and transported in a way that prevents them from rolling or shifting, which could cause damage to the pipe coating or fittings. It is also recommended to protect the pipes from exposure to extreme temperatures or weather conditions during transportation. By following these guidelines and taking the necessary precautions, the risk of damage to ductile iron pipes during transportation can be minimized.

Q: How do ductile iron pipes handle water velocity?: Ductile iron pipes are well-suited to handle water velocity due to their unique mechanical properties. Ductile iron is a highly durable and strong material that can withstand high water velocities without experiencing significant damage or deformation. The pipe's inherent ductility allows it to absorb the energy created by the flowing water, which helps to minimize the risk of pipe failure or bursting. This property makes ductile iron pipes capable of handling high-pressure water flow, making them ideal for applications where water velocity is a concern. Additionally, ductile iron pipes have a smooth internal surface, which promotes efficient water flow and minimizes friction losses. This smoothness reduces the resistance encountered by the water as it flows through the pipe, allowing for higher water velocities without compromising the pipe's integrity. Furthermore, ductile iron pipes can be manufactured in various sizes and thicknesses, allowing for customization based on specific water velocity requirements. This flexibility ensures that ductile iron pipes can effectively handle a wide range of water velocities, from low-flow applications to high-velocity scenarios. In summary, ductile iron pipes have excellent handling capabilities when it comes to water velocity. Their strength, ductility, and smooth internal surface contribute to their ability to withstand high water velocities without compromising their structural integrity, making them a reliable choice for water distribution systems.

Q: How are ductile iron pipes protected against internal corrosion?: To safeguard ductile iron pipes from internal corrosion, a range of preventive measures are implemented. The foremost technique involves the application of a protective coating on the pipe's inner surface. This coating acts as a barrier that separates the pipe from the conveyed fluid, thereby minimizing the risk of direct contact and corrosion. Another commonly employed method is the usage of a cement mortar lining, which fortifies the protective barrier, thereby reducing the possibility of corrosion, even in aggressive environments. Moreover, this lining ensures a smoother surface, enhancing fluid flow by diminishing friction. Apart from coatings and linings, ductile iron pipes are often designed with corrosion-resistant alloys or additives. These alloys, such as zinc or epoxy, are incorporated during the manufacturing process, offering an additional layer of defense against internal corrosion. They function as sacrificial anodes, corroding over time to shield the underlying iron from degradation. Regular maintenance and inspection play a vital role in safeguarding ductile iron pipes against internal corrosion. Monitoring the condition of protective coatings, identifying any signs of degradation or damage, and promptly addressing such issues are imperative to ensure the long-term integrity of the pipes. In summary, a combination of protective coatings, cement mortar linings, corrosion-resistant alloys, and regular maintenance efforts collaboratively safeguard ductile iron pipes against internal corrosion. This approach prolongs their lifespan and guarantees the secure transportation of fluids.

Q: What are the different lining thickness options for ductile iron pipe?: The specific application and project requirements typically dictate the various options for lining thickness in ductile iron pipes. Cement mortar lining, polyurethane lining, and polyethylene lining are among the most commonly used options. Cement mortar lining, which is widely employed in ductile iron pipes, involves the application of a layer of cement mortar on the inner surface of the pipe. This lining provides corrosion protection and enhances the hydraulic performance of the pipe. The thickness of cement mortar lining can vary from 3mm to 6mm. Polyurethane lining, another popular choice, is particularly suitable for applications requiring resistance to abrasion and chemical attack. It is usually applied using a spray or casting method, and the thickness can vary depending on project specifications. Typically, polyurethane linings range from 1mm to 4mm in thickness. Polyethylene lining, a relatively newer technology, is commonly used in applications where chemical corrosion resistance is crucial. The lining is applied using a rotational lining process, wherein a layer of molten polyethylene is evenly distributed on the internal surface of the pipe. The thickness of polyethylene lining can range from 2mm to 8mm, depending on project requirements. It is worth noting that the lining thickness can be tailored to meet specific project needs, including the corrosiveness of the transported fluid, operating conditions, and desired service life of the pipe. Consulting with a qualified engineer or pipe manufacturer is advisable to determine the most suitable lining thickness for a given application.

Q: What are the different types of thrust restraints for ductile iron pipe?: There are several different types of thrust restraints that can be used for ductile iron pipe installations. These thrust restraints are designed to prevent the pipe from moving or separating under the forces generated by internal pressure, external loads, or changes in temperature. 1. Thrust blocks: Thrust blocks are concrete structures that are typically installed at bends, tees, and other changes in direction in the pipeline. They are designed to resist the thrust forces by transferring them to the surrounding soil or foundation. 2. Mechanical restraints: Mechanical restraints, such as tie rods or harnesses, are used to restrain the pipe by exerting an external force on it. These restraints are typically made of steel and can be adjusted to accommodate changes in pipe length or alignment. 3. Pipe anchors: Pipe anchors are devices that are installed at specific intervals along the pipeline to provide resistance against axial movement. They are usually made of steel and are embedded into the surrounding soil or concrete to provide a secure anchor point for the pipe. 4. Thrust collars: Thrust collars are devices that are installed around the pipe to prevent it from moving or separating. They are typically made of steel and are placed at strategic locations along the pipeline to absorb the thrust forces. 5. Restrained joint systems: Restrained joint systems are specialized pipe joints that are designed to resist axial forces. These joints typically have additional features, such as keyways or wedges, that provide resistance against movement. It is important to select the appropriate type of thrust restraint based on the specific requirements of the ductile iron pipe installation. Factors such as the pipe diameter, operating pressure, soil conditions, and potential external loads should be considered when determining the most suitable thrust restraint system. Consulting with a qualified engineer or pipe manufacturer can help ensure the proper selection and installation of thrust restraints for ductile iron pipe.

Q: What does ductile iron pipe "ND200" mean?: Generally speaking, the diameter of the pipe can be divided into outer diameter, inner diameter and nominal diameter. The pipe is a seamless steel pipe pipe diameter by the letter D to represent, then additional outer diameter size and thickness, such as diameter of seamless steel pipe 108, a wall thickness of 5MM, denoted by D108*5, is also used outside said, such as De63 plastic pipe, such as reinforced concrete pipe, cast iron pipe, galvanized steel pipe, said the DN, in the design drawings is generally used to represent the nominal diameter, nominal diameter is a standard in order to design and manufacture and maintenance convenient set artificially, with nominal diameter, tube (or pipe) specification name.

Q: Can ductile iron pipe be used for underground applications?: Indeed, underground applications can employ ductile iron pipe. Renowned for its robustness and endurance, ductile iron pipe proves to be well-suited for a multitude of underground uses, including water and sewage systems, gas pipelines, and irrigation systems. Its exceptional resistance to corrosion and external burdens renders it a dependable selection for underground installations, where sustained functionality and structural soundness are pivotal considerations. Moreover, ductile iron pipe's pliability enables it to endure ground shifting and settling sans fracturing or shattering, making it an apt choice for regions susceptible to seismic occurrences.

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