DUCTILE IRON PIPES K8 DN500
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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:What is cast iron pipe?
- Divided into gray cast iron pipe and nodular cast iron pipe according to different material. According to the interface form, it is divided into flexible interface, flange interface, self anchored interface, rigid interface and so on. Among them, the flexible iron pipes rubber sealing ring; flange interface cast iron pipe flange fixed in the rubber pad, the flange gasket sealing; rigid interface cast iron pipe socket is large, straight pipe is inserted, sealed with cement, this technology has been basically eliminated.
- Q:How does the white iron appear in the case of ductile iron?
- Casting cooling, surface and thin section at often produce white. White tissue hard and brittle, poor processing performance, easy peeling. So it is necessary to use the annealing (or normalizing) method to eliminate white tissue. The annealing process: heating to 2 DEG C 550950 ~ 5 h, then 500 to 550 DEG C Furnace cooling again followed by air cooling. During high temperature insulation, high travel cementite eutectic cementite decomposition of graphite and A in the subsequent two carburizing cooling process and eutectoid cementite decomposition, graphitization process. Due to the decomposition of cementite, resulting in the decrease in hardness, thereby improving machinability.Hope to help you.
- Q:Are ductile iron pipes suitable for acidic or alkaline environments?
- Ductile iron pipes are generally suitable for both acidic and alkaline environments, although their performance may vary depending on the specific conditions. Ductile iron is a type of cast iron that has been treated with a small amount of magnesium to enhance its strength and flexibility. This treatment allows ductile iron pipes to withstand a wide range of conditions, including those found in acidic or alkaline environments. In acidic environments, ductile iron pipes provide good resistance to corrosion. The iron in the pipes reacts with the acid to form a protective layer of iron oxide, which helps prevent further corrosion. However, it is important to note that the performance of ductile iron pipes in acidic environments can be influenced by factors such as the concentration of the acid and the temperature. In highly concentrated or extremely acidic conditions, alternative materials like stainless steel or corrosion-resistant alloys may be more suitable. Similarly, in alkaline environments, ductile iron pipes exhibit good resistance to corrosion. The alkaline conditions in these environments typically help to passivate the surface of the iron, forming a protective layer that prevents further corrosion. However, as in acidic environments, the specific conditions and concentrations of alkalis may impact the performance of ductile iron pipes. In cases of very high alkalinity or extreme temperatures, other materials like plastic or concrete pipes may be more appropriate. It is worth noting that although ductile iron pipes are generally suitable for both acidic and alkaline environments, regular maintenance and monitoring are crucial to ensure their long-term performance. Proper attention should be given to monitoring the pH levels and other chemical characteristics of the environment to identify any potential issues or required maintenance. Consulting with experts or engineers in the field can provide valuable insights and guidance in selecting the most appropriate materials for specific acidic or alkaline environments.
- Q:What is the content of silicon in silicon molybdenum ductile iron?
- High silicon molybdenum ductile cast iron is developed for end users successfully reduces the cost, and the castings have high strength, good oxidation resistance, and has good performance under thermal cycling condition. This kind of ductile iron silicon content of 4% molybdenum content 0.6%-0.8%, currently designated as many car manifold and turbocharger shell, and molybdenum content than the silicon alloy casting 1% more for special high temperature exhaust pipe, heat treatment. High silicon molybdenum alloy nodular cast iron castings used in the production of automotive turbocharger.
- Q:Luo what effect of ductile cast iron
- It should be chromium, chromium is anti graphitization elements in ductile iron if the content for a long time, will hinder the graphitization of cast iron, the iron cementite microstructure (Fe3C) content increased, the chilling tendency of the cast iron increases, will make iron brittle, hard, affect the mechanical properties and processing properties of nodular cast iron.
- Q:How much pressure can the ductile iron pipe socket meet?
- If you let him as the supporting points, I do not recommend this
- Q:How long is the service life of the cast iron pipe, and the time of use of ductile iron pipes?
- Ductile iron is a new type of pipe, as long as we use it properly, the quality of its products, then the use of ductile iron pipes for 20-35 years, basically no problem. But whether it is ductile cast iron pipe, or some other things, the use of more years, and more or less, there will be some problems, ductile iron pipe can not escape the robbery. However, as long as we use the ductile iron pipe in the process of careful care, the service life of the problem is not to worry about.
- Q:Can ductile iron pipe be used for water distribution systems in cold climates?
- Yes, ductile iron pipe can be used for water distribution systems in cold climates. Ductile iron has excellent resistance to freezing and can withstand extreme cold temperatures without becoming brittle or cracking, making it a suitable choice for water distribution systems in cold climates.
- Q:Can ductile iron pipes be used in areas with high groundwater levels?
- Yes, ductile iron pipes can be used in areas with high groundwater levels. Ductile iron pipes are known for their durability and strength, making them suitable for various underground applications, including areas with high water tables. They have a robust construction that can withstand external pressures and corrosive environments, making them an excellent choice for water and wastewater systems in such areas.
- Q:Are ductile iron pipes recyclable?
- Yes, ductile iron pipes are recyclable. They can be melted down and reused to make new pipes or other iron products.
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DUCTILE IRON PIPES K8 DN500
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