DUCTILE IRON PIPE C Class DN900
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Ductile Iron Cast Pipe is without any defects compare with tradition casting tech, which has many advantages particularly as follow:
(1) High density. In the "vertical upward casting" process, the melt iron of centre liquid column in center crystallizer is continuously feeding for volume shrinkage caused by condensation tube at outer circumference , which lead to be free of shrinkage porosity.
(2) High purity. When melt iron pouring, the mixed impurities such as gas, dross, sand grain which are lighter than melt iron could be eliminated at furnace mouth, its impossible to enter into the crystallizer through the channel, so the melt iron into the crystallizer is very pure.
(3) Strength with toughness. The cooling speed provided by continuous crystallizer is 30 times than sand casting and 5 times than centrifugal casting, and doesn't produce white iron, the eutectic cell volume of continuous cast iron is one eighth to one tenth compare with traditional cast iron. The density of graphite nodule in ductile iron can reach 300-700 pcs/mm2. Therefore, all reason above improve the strength and toughness of continuous cast iron.
(4) Free machining. The high speed cooling make the hardening phase (such as boride, steadite) not appear like reticular, massive or thick, but diffuse like fish bone and pane in shape, moreover, there are tiny graphite flakes inlaid hardening phase. It's free machining in BrinellHardness the range of 250-300HB. However, the Brinell Hardness of 250 is top limit to common metal materials.
(5) Uniform composition of tube wall. The convection mixing of liquid column caused by marching type drawing in crystallizer make the composition of tube wall well-distributed, and concentration gradient very little.
(6) High productivity. To the wall thickness of tube under 10mm, the speed of continuous casting is 1 meter/min, to the wall thickness of tube under 20mm, the speed of continuous casting is 0.5 meter/min, which is high efficiency that centrifugal or other casting tech couldn't reach.
- Q:Can ductile iron pipe be used for potable water systems?
- Yes, ductile iron pipe can be used for potable water systems. Ductile iron is a type of cast iron that is known for its strength, durability, and ability to withstand high pressure. It is also corrosion-resistant, making it suitable for use in water distribution systems. Ductile iron pipe is commonly used in potable water systems due to its longevity and low maintenance requirements. Additionally, it is approved by various standards organizations, such as the American Water Works Association (AWWA), for use in potable water applications. However, it is important to ensure that the ductile iron pipe used for potable water systems is manufactured and installed according to the appropriate standards and regulations to ensure the safety and quality of the water supply.
- Q:How do ductile iron pipes perform in freeze-thaw cycles?
- Ductile iron pipes demonstrate exceptional performance in freeze-thaw cycles due to their material properties. With high tensile strength and excellent impact resistance, ductile iron is highly resistant to the stresses caused by freezing and thawing. Unlike other materials, these pipes can withstand the expansion and contraction during temperature changes without cracking or breaking. One of the primary reasons for the success of ductile iron pipes in freeze-thaw conditions is their capacity to absorb and dissipate stresses. The material's high ductility allows for slight deformation under stress, releasing pressure and preventing pipe damage. This characteristic ensures that the pipes can endure repeated freezing and thawing cycles without compromising their structural integrity. Furthermore, ductile iron pipes feature a durable and protective coating, such as cement mortar lining or polyethylene encasement, which further enhances their resistance to freeze-thaw cycles. These coatings offer an extra layer of protection, preventing direct contact between water and the iron and reducing the risk of corrosion. Moreover, ductile iron pipes have an extended service life, often exceeding 100 years, thanks to their inherent strength and resistance to various environmental factors, including freeze-thaw cycles. The pipes' ability to endure these cycles without significant damage ensures the reliability and durability of water distribution systems, even in regions prone to freezing temperatures. In conclusion, ductile iron pipes are highly dependable and excel in freeze-thaw cycles. Their high tensile strength, impact resistance, capacity to absorb stresses, and protective coatings make them the preferred choice for water distribution systems in areas with harsh winter conditions.
- Q:Can ductile iron pipes be used for trench crossings?
- Yes, ductile iron pipes can be used for trench crossings. Ductile iron pipes are known for their high strength and durability, making them suitable for various applications including trench crossings. They have the ability to withstand heavy loads and provide increased resistance to external forces, making them a reliable choice for such purposes.
- Q:Ductile iron gears are generally treated without heat treatment
- The mechanical properties of ductile iron are equivalent to quenched and tempered steel. The gears made of ductile iron can be quenched or tempered by high temperature + surface quenching, that is, quenching and tempering treatment + surface hardening.
- Q:How many degrees can the ductile iron pipe be each?
- Minimum tensile strength: 420/Mpa, minimum yield strength: 300/Mpa, minimum elongation 7%.
- Q:Are there any alternatives to ductile iron pipe for water distribution?
- Yes, there are several alternatives to ductile iron pipe for water distribution. Some common alternatives include PVC (Polyvinyl Chloride) pipes, HDPE (High-Density Polyethylene) pipes, and PEX (Cross-linked Polyethylene) pipes. Each of these alternatives has its own advantages and disadvantages in terms of cost, durability, ease of installation, and resistance to corrosion. The choice of alternative pipe material depends on factors such as the specific requirements of the water distribution system, budget constraints, and local regulations.
- Q:How are ductile iron pipes protected against stray current corrosion?
- Ductile iron pipes are protected against stray current corrosion through the implementation of various measures. One common method is the installation of a protective coating, such as an epoxy or zinc coating, on the external surface of the pipes. This coating acts as a barrier, preventing direct contact between the pipe and the surrounding soil or water. Additionally, cathodic protection systems, such as impressed current or sacrificial anode systems, can be employed to further protect the pipes. These systems help to control and redirect stray currents, minimizing their impact on the ductile iron pipes and preventing corrosion.
- Q:How much is the installation cost of the ductile iron tube?
- Ductile iron pipes mainly called centrifugal ductile iron pipe, it has the properties of nature, iron and steel, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..
- Q:Classification of cast iron pipes
- Drainage cast iron pipe:Pipes and fittings for plain cast iron bearing. Flexible anti-seismic interface cast iron pipe, this kind of cast iron pipe is sealed by rubber ring and bolt fastened. It has good flexibility and flexibility under water pressure. The utility model can adapt to larger axial displacement and lateral deflection, and is suitable for indoor drainage pipes of high-rise buildings, and is particularly suitable for earthquake zones. From the interface form, can be divided into: W flexible cast iron drain pipe, B flexible cast iron drain pipe, A flexible cast iron drain pipe.
- Q:Can ductile iron pipe be used for marine applications?
- Yes, ductile iron pipe can be used for marine applications. Ductile iron is a type of cast iron that possesses high strength, durability, and resistance to corrosion. These properties make it suitable for various marine environments, including saltwater applications. Ductile iron pipes are commonly used for marine applications such as seawater intake and outfall systems, offshore oil and gas platforms, submarine pipelines, and marine dredging projects. The corrosion-resistant nature of ductile iron helps protect against the harsh conditions found in marine environments, such as corrosive saltwater, tidal currents, and marine organisms. Additionally, ductile iron pipes are known for their excellent mechanical properties, including high tensile strength and impact resistance, which further enhance their suitability for marine applications. Overall, ductile iron pipe is a reliable and cost-effective choice for various marine applications.
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DUCTILE IRON PIPE C Class DN900
- Ref Price:
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