• DUCTILE IRON PIPE K8 DN300 System 1
  • DUCTILE IRON PIPE K8 DN300 System 2
  • DUCTILE IRON PIPE K8 DN300 System 3
  • DUCTILE IRON PIPE K8 DN300 System 4
  • DUCTILE IRON PIPE K8 DN300 System 5
DUCTILE IRON PIPE K8 DN300

DUCTILE IRON PIPE K8 DN300

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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 the expected joint tightness for ductile iron pipes?
The expected joint tightness for ductile iron pipes is typically high due to the robustness of the material and the quality of the jointing methods used, such as rubber gaskets or mechanical couplings. This ensures a reliable and leak-free performance in various applications.
Q: What is the lifespan of ductile iron pipes?
The durability and longevity of ductile iron pipes can vary depending on several factors, including pipe quality, installation conditions, and the surrounding environment. On average, these pipes typically last between 50 and 100 years, making them an excellent choice for water and sewer infrastructure. By implementing proper maintenance practices and conducting regular inspections, ductile iron pipes can remain highly functional and efficient for many decades. It should be noted that factors such as corrosion, soil conditions, and water chemistry can influence the lifespan of these pipes, so it is important to monitor and address these issues in order to extend their longevity.
Q: What new technologies are there for the installation of ductile iron pipes?
Because the new flexible interface mechanism of cast iron drainage pipe pipe in the development of China's relatively short history, compared with other drainage pipes, people know little of the present, with some experience of the author in the construction, the application of the performance, characteristics and engineering, to do some simple introduction.
Q: Can ductile iron pipes be used in agricultural applications?
Yes, ductile iron pipes can be used in agricultural applications. Ductile iron pipes are known for their strength, durability, and corrosion resistance, making them suitable for various agricultural uses such as irrigation systems, water supply networks, and drainage systems. They can withstand high pressure, handle heavy loads, and are also resistant to external factors like soil movements and root penetration.
Q: What is the maximum temperature that ductile iron pipe can handle?
The ability of ductile iron pipe to withstand high temperatures varies depending on factors such as the grade of ductile iron, the length of time exposed to heat, and the presence of external factors like corrosive environments. In general, ductile iron pipes can tolerate temperatures up to 400-450 degrees Fahrenheit (204-232 degrees Celsius) for short periods. However, it is crucial to refer to the manufacturer's specifications and guidelines to determine the exact maximum temperature limits for a specific grade of ductile iron pipe. Additionally, it is advisable to consider the consequences of thermal expansion, potential loss of mechanical properties, and any additional protective measures that may be necessary when operating at elevated temperatures.
Q: How are ductile iron pipes joined to fittings and valves?
Fittings and valves are commonly connected to ductile iron pipes using either flanged connections or mechanical joints. Flanged connections involve the use of circular discs called flanges, which have evenly spaced holes around the edge. These flanges are bolted together to create a tight seal between the pipe and the fitting or valve. To connect a ductile iron pipe to a fitting or valve using a flanged connection, the pipe end is first prepared by cleaning and removing any rough edges. Then, a gasket made of rubber or another suitable material is placed between the pipe end and the flange face. The flange is aligned with the pipe, and bolts are inserted through the holes in the flange, passing through corresponding holes in the fitting or valve. Once all the bolts are in place, they are tightened evenly, gradually applying pressure to compress the gasket and create a secure, leak-proof seal. To ensure proper alignment and sealing, the bolts are typically tightened in a specific pattern or sequence. Alternatively, mechanical joints can be used to join ductile iron pipes to fittings and valves. This involves inserting a rubber gasket or gland into a groove on the pipe end. The fitting or valve also has a corresponding groove, and when the two are brought together, the gasket is compressed to create a tight seal. Mechanical joints offer some flexibility, allowing for slight movement or expansion and contraction of the pipe. This is beneficial in applications where there may be thermal variations or ground movement, as it reduces the risk of pipe failure. Both flanged connections and mechanical joints are widely used in various industries and applications that require the connection of ductile iron pipes to fittings and valves. The choice of joining method depends on factors such as the specific application, pipe size, pressure requirements, and local codes and regulations.
Q: The difference between spheroidal graphite cast iron pipe and HDPE water supply pipe
HDPE pipe is made of hot melt butt joint, and the strength of interface is very good. Ductile iron pipes are made of socket joint, and reinforced concrete piers shall be rammed on three links, elbows and other parts. In this regard, the cost of natural selection of ductile iron pipe, HDPE pipe than the choice of high.
Q: Are ductile iron pipes suitable for sewer force mains?
Sewer force mains can indeed make use of ductile iron pipes. Ductile iron, a variant of cast iron, possesses a higher degree of strength and flexibility in comparison to conventional cast iron pipes. This quality renders it suitable for applications where pipes must endure high pressure and heavy loads, such as sewer force mains. Ductile iron pipes exhibit exceptional resistance against corrosion and boast impressive durability, which proves vital for sewer systems that face exposure to various corrosive substances and challenging environments. Moreover, these pipes possess the ability to absorb vibrations and shocks, thereby reducing the risk of pipe failures caused by external forces. Furthermore, ductile iron pipes possess a renowned reputation for their lengthy service life, frequently extending beyond 100 years. As a result, they constitute a cost-effective choice for sewer force mains, necessitating minimal maintenance and replacement throughout their lifespan. In conclusion, ductile iron pipes offer a dependable and long-lasting solution for sewer force mains, delivering the requisite strength, flexibility, and resistance to corrosion to ensure the efficiency and durability of sewer systems.
Q: What is the expected hoop stress capacity of ductile iron pipes?
The expected hoop stress capacity of ductile iron pipes can vary depending on various factors such as the pipe's diameter, wall thickness, and material grade. However, in general, ductile iron pipes have a high level of strength and durability, making them capable of withstanding significant hoop stress. Ductile iron pipes are designed and manufactured to meet specific standards and requirements, such as the American Water Works Association (AWWA) C151 and C115 standards. These standards ensure that the pipes have sufficient strength to handle the anticipated loads and pressures they may encounter during their service life. The hoop stress capacity of ductile iron pipes is primarily determined by their tensile strength. Ductile iron is a type of cast iron that has been treated to exhibit ductility, meaning it can withstand tensile stress without fracturing. This property makes it suitable for applications where the pipes may experience internal or external pressure, such as water distribution systems or sewer lines. To determine the expected hoop stress capacity, engineers typically perform calculations based on the specific pipe dimensions, material properties, and the expected operating conditions. These calculations consider factors such as the internal pressure, external loads, and the safety factors required by the applicable design standards. It is important to note that the expected hoop stress capacity of ductile iron pipes should always be verified using the manufacturer's specifications and engineering calculations. Additionally, any modifications or repairs to the pipes should be performed by qualified professionals in accordance with industry guidelines to ensure their continued strength and performance.
Q: How can stainless steel pipes and ductile iron pipes be joined?
The utility model can be connected with a wide range flange joint or a wide range flexible joint

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