• DUCTILE IRON PIPES K8 DN80 System 1
  • DUCTILE IRON PIPES K8 DN80 System 2
  • DUCTILE IRON PIPES K8 DN80 System 3
DUCTILE IRON PIPES K8 DN80

DUCTILE IRON PIPES K8 DN80

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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:How do ductile iron pipes handle ground movement or settlement?
Ductile iron pipes are renowned for their remarkable strength and flexibility, enabling them to effectively manage ground movement or settlement. Ground movement or settlement pertains to the natural shifts or settling of the earth's surface, which can exert stress on subterranean infrastructure such as pipes. Concerning ground movement, ductile iron pipes possess the advantage of enduring and absorbing the pressure and movement caused by shifting soil. The material's ductility permits the pipes to flex and bend to a certain extent without fracturing. This flexibility aids in distributing the load and minimizing the potential for harm. Additionally, ductile iron pipes exhibit high resistance to cracking or fracturing, even under extreme circumstances. This resilience stems from the material's unique microstructure, which imparts excellent tensile strength and impact resistance. Consequently, ductile iron pipes can withstand external forces and ground settlement without compromising their integrity. To further augment their capacity to handle ground movement or settlement, ductile iron pipes are frequently installed using flexible joints. These joints allow for slight movement and accommodate any shifting or settling of the ground. Furthermore, proper bedding and backfilling techniques are employed during installation to provide added support and stability. Overall, ductile iron pipes possess a proven track record in managing ground movement or settlement. Their strength, flexibility, and resistance to cracking establish them as a dependable choice for subterranean infrastructure, ensuring the durability and efficiency of water distribution systems.
Q:Can ductile iron pipe be used for wastewater treatment plant applications?
Ductile iron pipe is indeed applicable for wastewater treatment plant purposes. Its suitability stems from several properties it possesses. Firstly, its high resistance to corrosion is crucial in such plants, where the presence of chemicals and water can cause pipe rust and degradation. Moreover, its high tensile strength and durability enable it to withstand the demands of wastewater treatment processes. Furthermore, its flexibility facilitates easy installation and maintenance within intricate wastewater treatment systems. In conclusion, ductile iron pipe is a dependable and cost-effective option for wastewater treatment plant applications.
Q:How do ductile iron pipes handle thermal expansion and contraction?
The exceptional ability of ductile iron pipes to handle thermal expansion and contraction is well-known. This ability stems from their distinctive composition and design, which enable them to endure temperature fluctuations without sustaining significant harm or deformation. Thermal expansion arises when a material expands as a result of increased temperature, while thermal contraction refers to the contraction that occurs when a material cools down. Ductile iron pipes effectively accommodate these temperature changes by utilizing their inherent flexibility and strength. A key factor that enables ductile iron pipes to manage thermal expansion and contraction is their high ductility, which refers to their capacity to deform without breaking. This ductility allows the pipes to absorb the forces of expansion and contraction without developing cracks or ruptures. Additionally, the composition of ductile iron pipes includes graphite nodules, which act as microcracks that can absorb stress and prevent material fracturing. This unique microstructure enhances the pipes' resistance to thermal expansion and contraction. Furthermore, ductile iron pipes are often designed with joints that allow for limited movement. These joints, such as mechanical joints or push-on joints, can accommodate pipe expansion and contraction by offering a certain level of flexibility. This helps prevent the pipes from being excessively stressed or damaged. In conclusion, ductile iron pipes are specifically engineered to effectively handle thermal expansion and contraction. Their high ductility, unique microstructure, and joint design make them a robust and dependable choice for applications where temperature variations are expected.
Q:How can the steel plastic composite pipe be connected with the cast iron pipe?
The hoop has the advantages of beautiful appearance, convenient operation, strong clamping force, good sealing performance, etc.. Mainly used for connecting and fastening vehicle, ship, diesel engine, gasoline engine, machine tools, fire, and other machinery and equipment, chemical equipment general nylon hose, plastic hose, hose cloth, water interface and seal etc..
Q:Can ductile iron pipe be used for high-pressure gas systems?
Yes, ductile iron pipe can be used for high-pressure gas systems. Ductile iron pipes have excellent strength and durability, making them suitable for handling high-pressure gas applications. Additionally, their corrosion resistance properties make them an ideal choice for gas transmission systems.
Q:Are ductile iron pipes suitable for use in agricultural applications?
Indeed, agricultural applications can benefit from the utilization of ductile iron pipes. Renowned for their remarkable strength and durability, these pipes are well-suited to endure the substantial loads and pressures frequently encountered in agricultural operations. Furthermore, their exceptional resistance to corrosion proves invaluable in agricultural settings where pipes may come into contact with chemicals or fertilizers. Additionally, the long lifespan of ductile iron pipes diminishes the necessity for frequent replacements, thereby minimizing maintenance expenses. In summary, the dependable choice of ductile iron pipes stems from their resilient nature and capacity to meet diverse agricultural demands.
Q:Can ductile iron pipes be used for water tunnel crossings?
Indeed, water tunnel crossings can utilize ductile iron pipes. Renowned for their robustness, longevity, and immunity to corrosion, ductile iron pipes prove to be an ideal option for diverse purposes, including water tunnel crossings. Their ability to endure immense pressure, external burdens, and soil movements, commonly experienced in tunnel crossings, is commendable. Moreover, ductile iron pipes boast an extended lifespan and necessitate minimal upkeep, rendering them an economical resolution for water tunnel crossings.
Q:Are ductile iron pipes resistant to abrasion or wear?
Yes, ductile iron pipes are highly resistant to abrasion or wear. Ductile iron, also known as cast iron, is a strong and durable material that is specifically designed to withstand abrasive conditions. The unique microstructure of ductile iron provides excellent resistance to abrasion, making it an ideal choice for applications where pipelines are exposed to high levels of wear. Additionally, ductile iron pipes are known for their long service life, which further demonstrates their ability to withstand abrasion and wear over time.
Q:Do ductile iron pipes require external protection against stray electrical currents?
Yes, ductile iron pipes do require external protection against stray electrical currents. This is necessary to prevent corrosion and ensure the longevity of the pipes.
Q:Some questions about the bearing capacity of nodular cast iron pipes!
But the key is that the cast iron pipe needs centrifugal casting, especially the longer tube. Therefore, we must understand whether the production plant has this production condition, otherwise, the higher quotation may not be able to produce.

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