Ductile Iron Pipe DN150

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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:How do ductile iron pipes handle ground movement due to tree roots?: Ductile iron pipes possess a robust and enduring nature, rendering them exceptionally resilient against ground movement induced by tree roots. The flexibility of ductile iron enables it to endure the pressure exerted by growing tree roots without fracturing or breaking. This capability is attributed to the material's aptitude for absorbing and dispersing stress, thereby minimizing the impact of ground movement. Furthermore, ductile iron pipes exhibit a sleek inner surface that diminishes the likelihood of tree roots infiltrating. The firmly sealed joints between the pipes likewise prevent root penetration and subsequent harm. In cases where tree roots do manage to infiltrate the soil and make contact with ductile iron pipes, their resistance to corrosion offers an additional advantage. Ductile iron pipes are coated with a protective layer that thwarts the formation of rust and corrosion, guaranteeing their long lifespan and structural integrity. Nevertheless, it is imperative to acknowledge that despite the high resistance of ductile iron pipes to ground movement caused by tree roots, regular inspection and maintenance are still advisable. This facilitates early detection and the necessary execution of repairs if any root infiltration or damage is identified.

Q:QT400-10 nodular cast iron requires hardness of HRC47~51. Why can't quench hardness be reached?: Quenching temperature: when the silicon content of nodular cast iron is 2.0-3.0%, the quenching temperature is 860-900 DEG C, the silicon content is low, and the upper limit is taken when the lower limit is high.2. holding time: because of the consideration of diffusion graphite cast iron, alloy steel is therefore the holding time, holding time longer than carbon steel.3. oil quenching.

Q:What is the disadvantage of nodular cast iron in excess of silicon?: Therefore, the increase of silicon content in nodular iron greatly improves the strength index and reduces toughness. Ductile iron has a greater crystalline undercooling and a tendency to chill when treated by spheroidizing, and silicon reduces this tendency.

Q:Are ductile iron pipes resistant to root intrusion?: Although ductile iron pipes typically show resistance to root intrusion, they are not completely impervious. Despite the strength and durability of the material, root intrusion can still happen if there are any cracks, joints, or damaged parts in the pipes. It should be emphasized that root intrusion tends to occur more frequently in older or inadequately maintained pipes, where cracks or gaps may eventually form. However, modern ductile iron pipes are frequently coated with protective layers or linings to decrease the likelihood of root intrusion. Moreover, regular inspection and maintenance can aid in identifying and resolving potential problems before they become more serious.

Q:What are some common applications for ductile iron pipe?: Ductile iron pipe, also known as DI pipe, is widely used in various applications due to its durability, strength, and corrosion resistance. Here are some common applications for ductile iron pipe: 1. Water Distribution: Ductile iron pipe is extensively used for the distribution of potable water. Its high tensile strength allows it to withstand high water pressure, making it ideal for water mains, water transmission lines, and water distribution networks. 2. Sewer Systems: Ductile iron pipe is commonly used in sewer systems due to its resistance to corrosion and its ability to handle high loads. It is often used for gravity sewer lines, force mains, and stormwater systems. 3. Industrial Applications: Ductile iron pipe finds applications in various industrial settings, including power plants, chemical plants, and refineries. It is used for the transportation of water, wastewater, and other fluids in these industries. 4. Irrigation Systems: Due to its strength and long lifespan, ductile iron pipe is suitable for irrigation systems, especially in agricultural areas. It is used to transport water for irrigation purposes, ensuring efficient water distribution in fields and farms. 5. Fire Protection Systems: Ductile iron pipe is commonly used for fire protection systems, including fire hydrants, fire sprinkler systems, and fire suppression systems. Its robustness and resistance to high pressure make it an excellent choice for reliable and effective fire protection. 6. Pumping Stations: Ductile iron pipe is often used in pumping stations, which are crucial for various water-related applications. It is employed in water intake systems, wastewater pumping stations, and water treatment plants to transport water and wastewater efficiently. 7. Municipal Infrastructure: Ductile iron pipe is widely used in municipal infrastructure projects, including road drainage systems, culverts, and bridge crossings. Its strength, durability, and resistance to external loads make it suitable for these applications. 8. Gas Distribution: Although more commonly used for water-related applications, ductile iron pipe is also used for the distribution of natural gas and other gases. It is preferred for gas distribution due to its resistance to corrosion and its ability to withstand high-pressure environments. Overall, ductile iron pipe has a wide range of applications and is preferred in situations that require strength, durability, and resistance to corrosion. Its versatility and reliability make it a popular choice for various infrastructure projects and industrial applications.

Q:Can ductile iron pipes be used in gravity sewer systems?: Yes, ductile iron pipes can be used in gravity sewer systems. Ductile iron is a strong and durable material that is commonly used in various applications, including sewer systems. It has excellent resistance to corrosion and can withstand high pressure and heavy loads. Additionally, ductile iron pipes have a smooth interior surface, which helps to reduce friction and improve the flow of waste and wastewater. Therefore, they are a suitable choice for gravity sewer systems, where the flow of sewage relies on gravity to move through the pipes.

Q:The difference between spheroidal graphite cast iron pipe and HDPE water supply pipe: (4) HDPE pipes do not need corrosion protection. If the water supply pipeline is made of ductile iron pipe, the inner and outer walls of the ductile iron pipe shall be treated with corrosion protection.(5) the normal service life of the ductile iron pipe is 20~25 years after the pipe is treated by inner and outer walls. The HDPE tube has no corrosion, and the normal service life is 50 years.

Q:How do ductile iron pipes handle ground movement in earthquake-prone areas?: In earthquake-prone areas, ductile iron pipes are highly regarded for their exceptional resistance to ground movement. These pipes are specifically designed to endure external forces, including seismic activities and shifting ground. The remarkable flexibility of ductile iron pipes allows them to effectively absorb and distribute the energy generated during ground movement. This flexibility is achieved through the unique composition of ductile iron, which contains nodular graphite in its microstructure. The presence of nodular graphite grants the pipe with ductility and resilience, enabling it to deform under stress without breaking. During an earthquake, when the ground begins to shift, ductile iron pipes have the capacity to adapt to the changing conditions. They can elongate, compress, and bend, thereby reducing the likelihood of pipe failure. This characteristic is of utmost importance in earthquake-prone areas, as it helps prevent catastrophic failures and water loss that may occur with more rigid pipe materials. Furthermore, ductile iron pipes possess a high level of joint integrity, further enhancing their ability to withstand ground movement during seismic events. The joints of these pipes are engineered to withstand lateral and angular movement, ensuring their integrity and preventing leaks. In addition to their inherent flexibility, ductile iron pipes are often installed using techniques that enhance their resistance to ground movement. Anchoring systems, such as thrust blocks and restraints, can be employed to secure the pipes and prevent excessive movement. These systems contribute to the stability of the pipeline network and further minimize the potential for damage during earthquakes. Overall, the combination of ductility, joint integrity, and anchoring systems make ductile iron pipes an exceedingly reliable choice for managing ground movement in earthquake-prone areas. They offer a durable and resilient solution that can withstand the challenges posed by seismic activities, guaranteeing a continuous water supply and minimizing the risk of infrastructure damage.

Q:What are the meanings of cast iron pipe wall thicknesses LA, A and B respectively?: You are mistaken in concept. The cast iron pipe is the sort of connection method. The ductile iron pipe is classified according to the material.

Q:How can the cast iron pipe be connected?: Cast iron pipes are flanged and socket connected

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