DUCTILE IRON PIPES C Class DN550
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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 be welded? Is weldability comparable to gray iron?
- Suitable for the full range of cold welding welding, welding cast iron base material can almost all, and it is easy to achieve cast iron and carbon steel dissimilar metal welding, such as solving matrix fracture, crack, wear, hole filling defects after welding can be machined, many applications in the engine casing, cylinder head, casting machine, gear base the tooth of iron castings.
- Q: Is the cast iron pipe buried in need of antiseptic treatment? What kind of anticorrosive materials are used?
- Is to put the pipe surface rust corrosion, polished clean, brush again primer, and then wrapped a layer of glass cloth wrapped paint, two layers of glass cloth on the line, the thickness of not less than 6mm, painted with epoxy coal tar paint or asphalt paint
- Q: Does the cast iron pipe for spheroidal graphite need corrosion protection when laying underground?
- In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the cast iron pipes, ductile iron pipes and finished product libraries can be better improved, with the nature of iron and the properties of steel
- Q: How do ductile iron pipes perform in seismic zones?
- Ductile iron pipes have proven to perform exceptionally well in seismic zones due to their unique characteristics and design features. These pipes are known for their ability to withstand ground movements, vibrations, and other seismic forces that may occur during an earthquake. The inherent flexibility of ductile iron pipes allows them to absorb and distribute the energy generated by seismic activities. This flexibility helps prevent the pipes from fracturing or breaking under intense ground shaking. Additionally, the high strength and resilience of ductile iron make it highly resistant to damage caused by ground movements. Furthermore, ductile iron pipes are designed with restrained joints, which provide added stability and resistance to seismic forces. These joints can accommodate small lateral movements without compromising the integrity of the pipeline system. The restrained joints also prevent the pipes from becoming disconnected or misaligned during seismic events, ensuring the continuous flow of water or other fluids. In seismic zones, where the ground is more prone to liquefaction or soil settlement, ductile iron pipes are often installed using methods that enhance their stability. For instance, the use of deep embedment techniques or the incorporation of thrust blocks at bends and fittings increases the resistance of the pipes to the lateral forces exerted by the ground. The performance of ductile iron pipes in seismic zones is further enhanced by regular inspection and maintenance. Periodic assessments can detect any potential weaknesses or damages that may have occurred during seismic events, allowing for timely repairs or replacements to be made. Overall, ductile iron pipes have a proven track record of reliable performance in seismic zones. Their flexibility, strength, and design characteristics make them highly resilient to seismic forces, ensuring the safe and uninterrupted supply of water or other fluids even in areas prone to earthquakes.
- Q: How does ductile iron pipe perform in areas with high soil movement?
- Ductile iron pipe performs well in areas with high soil movement due to its inherent flexibility and strength. Its ability to withstand soil settlement, ground shifting, and seismic activity makes it a reliable choice for underground pipelines. The pipe's ductility allows it to sustain deformation without fracturing, ensuring continued functionality even in challenging soil conditions. Consequently, ductile iron pipe is an ideal solution for areas prone to soil movement, providing long-lasting and durable performance.
- Q: What are the disadvantages of using ductile iron pipes?
- One disadvantage of using ductile iron pipes is their susceptibility to corrosion. Over time, exposure to moisture and various chemicals can cause the pipes to deteriorate and develop leaks. Another disadvantage is their relatively high cost compared to other pipe materials, such as PVC or HDPE. Additionally, ductile iron pipes are heavy and require specialized equipment for installation, which can increase labor and transportation costs.
- Q: What is the relationship between the direction of the spigot and the direction of the flow in the ductile iron pipe?
- Use more than 18 casting molten iron, by adding the spheroidizing agent, through the centrifugal ductile iron machine high-speed centrifugal casting pipe
- Q: Can ductile iron pipes be used in earthquake-prone areas?
- Yes, ductile iron pipes can be used in earthquake-prone areas. Ductile iron is a strong and flexible material that can withstand the ground movement and vibrations caused by earthquakes. It has excellent ductility, meaning it can deform without fracturing or breaking under stress. This property allows ductile iron pipes to absorb the energy generated during an earthquake, reducing the risk of pipe failure or rupture. Additionally, ductile iron pipes have been successfully used in seismic zones for many years, proving their resilience and reliability in such areas. However, it is important to note that proper installation and design considerations, such as using appropriate jointing methods and ensuring proper anchoring, are essential for ensuring the performance of ductile iron pipes in earthquake-prone areas.
- Q: What kind of valves are commonly used in ductile iron pipes?
- Gate valve, butterfly valve, globe valve, check valve flange of various valves, (but the pipeline used for water supply and some limitations of the transport medium may be prescribed valve type) now due to material improvements in the technology, in most cases, smaller pipe diameter is also large diameter pipe outlet valve, butterfly valve, because of the pipeline the large diameter pressure in the pipeline and water than the small caliber to open and close the valve, to human hard, efficiency is not high, so for butterfly valve,
- Q: Are ductile iron pipes resistant to environmental stress cracking?
- Yes, ductile iron pipes are highly resistant to environmental stress cracking.
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DUCTILE IRON PIPES C Class DN550
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
OKorder Financial Service
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