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:The difference between cast iron pipe and ductile iron pipe: Cast iron pipes, also known as pig iron pipes, ordinary gray iron. Often used in socket connection, the sealing material is usually cement rigid interface.

Q:How do ductile iron pipes handle pipe deflection?: Ductile iron pipes have high flexibility and strength, allowing them to handle pipe deflection effectively. They can withstand moderate deflection without causing significant damage or compromising their structural integrity. This flexibility is due to the ductile nature of the iron used in their construction, which allows them to bend and adapt to changes in the ground or surrounding environment. Overall, ductile iron pipes are well-suited for handling pipe deflection situations.

Q:How are ductile iron pipes different from other types of pipes?: Ductile iron pipes are different from other types of pipes primarily due to their enhanced strength and durability. Unlike traditional cast iron pipes, ductile iron pipes have a higher tensile strength and can withstand higher internal and external pressures. They are also less prone to cracking or breaking under heavy loads or impact, making them suitable for both above-ground and underground applications. Additionally, ductile iron pipes offer superior resistance to corrosion, which increases their lifespan and reduces maintenance requirements compared to other pipe materials.

Q:Can ductile iron pipes be used for water supply in buildings?: Yes, ductile iron pipes can be used for water supply in buildings. Ductile iron pipes are known for their strength, durability, and corrosion resistance, making them suitable for a variety of applications, including water supply systems. They have a high tensile strength and can withstand high-pressure environments, making them ideal for delivering water to buildings. Additionally, ductile iron pipes have a long service life, reducing the need for frequent replacements. They also have good flow characteristics, allowing for efficient water distribution within the building. Therefore, ductile iron pipes are a reliable and commonly used choice for water supply systems in buildings.

Q:Will the quality of ductile iron shrink?: This is a ductile iron is prone to problems, manhole covers, large flat pieces, you have to see clearly, and some appear to be concave, not shrink, it may be caused by large gas emissions, not out

Q:Are ductile iron pipes suitable for use in chemical storage tanks?: No, ductile iron pipes are not suitable for use in chemical storage tanks.

Q:How do ductile iron pipes handle extreme temperatures?: Ductile iron pipes, known also as cast iron pipes, possess the ability to effectively handle extreme temperatures. The material composition of ductile iron enables it to endure both high and low temperatures without experiencing significant damage or degradation. When exposed to high temperatures, ductile iron pipes demonstrate exceptional thermal resistance, rendering them suitable for applications involving the transportation of hot liquids or gases. The high melting point of ductile iron, ranging from 2060°C to 2200°C, guarantees that the pipes can withstand extreme heat without melting or distorting. Consequently, these pipes are ideal for utilization in industries such as oil and gas, steam distribution, and high-temperature water supply systems. Likewise, ductile iron pipes exhibit satisfactory performance in low-temperature environments. They possess a low coefficient of thermal expansion, thereby enabling them to endure the expansion and contraction that occurs during temperature fluctuations without cracking or fracturing. This quality makes them appropriate for use in cold climates or in applications involving the transportation of chilled liquids or gases. Furthermore, ductile iron pipes possess excellent thermal conductivity, allowing them to efficiently dissipate heat. This characteristic proves particularly significant in high-temperature applications where effective heat transfer is vital to prevent damage to the pipes or the materials being transported. In conclusion, ductile iron pipes effectively handle extreme temperatures due to their high melting point, low coefficient of thermal expansion, and exceptional thermal conductivity. These attributes establish them as a dependable choice for various applications involving extreme temperature conditions.

Q:How can the ductile iron pipes be treated with corrosion protection?: Cement mortar lining + special coatingThe internal corrosion prevention measures are suitable for pipes conveying sewage, and the corrosion resistance of lining can be improved.

Q:How do ductile iron pipes perform in cold weather conditions?: The exceptional performance of ductile iron pipes in cold weather conditions is well-known. Unlike cast iron or PVC, ductile iron exhibits remarkable resistance to low temperatures. This resistance is primarily attributed to its unique microstructure, which enables it to maintain its structural integrity even in extreme weather conditions. In freezing temperatures, ductile iron pipes demonstrate a low coefficient of thermal expansion, meaning they do not contract or expand significantly with changes in temperature. This characteristic ensures their stability and prevents cracking or bursting. Additionally, the high impact resistance of ductile iron further enhances its ability to withstand the stress imposed by cold weather conditions. Moreover, ductile iron pipes are equipped with a protective lining, typically composed of cement mortar or epoxy. This lining acts as an additional barrier against the effects of cold weather, preventing the formation of ice on the inner surface of the pipes. Consequently, the risk of blockages or reduced flow capacity is greatly reduced. In conclusion, ductile iron pipes are a reliable choice for cold weather conditions. Their durability, low thermal expansion, and protective lining make them highly resistant to the challenges posed by freezing temperatures. Whether used for water supply, sewer systems, or other applications, ductile iron pipes have consistently proven their effectiveness even in the harshest winter climates.

Q:What is the relationship between the installation direction of the ductile iron pipe and the direction of flow?: Suppose the water flows from east to west, then the pipe mouth is in the East socket at the West

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