DUCTILE IRON PIPE C Class 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:Can ductile iron pipes be used for stormwater management?: Yes, ductile iron pipes can be used for stormwater management. Ductile iron is a strong and durable material that can withstand the pressure and load of stormwater. It is resistant to corrosion, making it suitable for long-term use in stormwater management systems. Additionally, ductile iron pipes have a smooth interior surface, facilitating a smooth flow of water and reducing the risk of blockages.

Q:What new technologies are there for the installation of ductile iron pipes?: At present, the international general no faucet pipe hoop straight pipe and fittings (i.e. new flexible joint cast iron drainage pipes and fittings of the thesis), according to the interface type is divided into A type flexible interface (flange gland connection) and type W (flexible interface coupling connection) two, referred to as A type and W type.1.1 new flexible joint cast iron drainage pipe by centrifugal casting technology, has a compact structure, pipe wall thickness, the outer wall is smooth, no trachoma and slag, the tensile strength and compressive strength are high, products with stable chemical composition, corrosion resistance, fire retardant non-toxic, comply with fire safety requirements of environmental protection, no noise, no deformation, life. Long use.Type 1.2A: type A tube with high strength, low noise, good fireproof performance, long service life, with the advantages of flexibility and good seismic performance, but in the actual project that socket joints need larger installation space and the tube body is heavy, consumption of steel, especially in high-rise buildings it is difficult to accept by construction.

Q:Can ductile iron pipe be used for compressed air systems?: Yes, ductile iron pipe can be used for compressed air systems. Ductile iron pipe is known for its strength, durability, and resistance to cracking, making it suitable for various applications including compressed air systems. It is capable of withstanding high pressure and is less likely to corrode or rust compared to other materials. However, it is important to ensure that the ductile iron pipe is properly sized and installed to handle the specific requirements of the compressed air system. Additionally, regular maintenance and inspection should be conducted to prevent any potential issues or damages.

Q:Can ductile iron pipes be used for underground parking lot drainage?: Yes, ductile iron pipes can be used for underground parking lot drainage. Ductile iron pipes are highly durable, resistant to corrosion, and can withstand heavy loads, making them suitable for underground applications.

Q:Can ductile iron pipe be used for underground fire protection systems?: Underground fire protection systems can utilize ductile iron pipe, a strong and durable material commonly used in various applications such as water and wastewater systems and fire protection systems. This material boasts excellent strength, corrosion resistance, and longevity, making it particularly suitable for underground installations. When it comes to fire protection systems, ductile iron pipe is highly capable of managing high-pressure water flow and enduring extreme conditions, making it an ideal option for underground installations. It can withstand the intense heat and pressure that may arise during a fire event. Furthermore, ductile iron pipe is available in different sizes and configurations, allowing for flexibility in design and installation. It is also compatible with various types of fittings and accessories, simplifying the connection to other components of the fire protection system. All in all, ductile iron pipe is a trustworthy and long-lasting choice for underground fire protection systems, guaranteeing the safety of the premises and its occupants.

Q:Are ductile iron pipes suitable for trenchless pipe bursting methods?: Indeed, ductile iron pipes prove to be an appropriate choice for trenchless pipe bursting techniques. Displaying exceptional strength and durability, ductile iron emerges as a material capable of enduring the formidable forces implicated in the pipe bursting procedure. Its remarkable tensile strength safeguards against the occurrence of cracks or fractures during the bursting process. Moreover, the inner surface of these pipes boasts a smooth texture, which facilitates the efficient flow of fluids such as water. The aforementioned smoothness further diminishes the odds of encountering blockages or accumulation within the pipe. All things considered, ductile iron pipes represent a dependable alternative for trenchless pipe bursting methods.

Q:What does "K8" mean in ductile iron pipe grades?: In wall thickness, K is the standard for wall thickness. The smaller the figure, the thinner the wall thickness of the same specification.For example, the K7 wall thickness of K8 is less than K8, and the wall thickness of DN500 is less than K9

Q:What is the use of ductile iron?: Ductile iron is used as a conduit at the beginning. Iron pipes and fittings are mostly produced by major industrial countries. Their manufacture, design and use are in line with national standards and international standards and procedures (I502531). As far as water and other liquids are concerned, it has long been proved that ductile iron pipes are superior to gray iron pipes. The main reason for this change is the combination of strength and toughness of Ferritic Ductile Iron, which makes the pipes made of this material subject to high operating pressures and can be readily loaded and laid during laying. A gas pipeline must be able to withstand multiple use requirements, which stand near the pipeline excavation and municipal engineering construction and transportation, where the ball iron pipes with high strength, high performance and simple installation and connection technology has proved that this material selection is decisive.

Q:How is ductile iron pipe different from cast iron pipe?: Ductile iron pipe and cast iron pipe are commonly used in plumbing and drainage applications, but they have differences in composition, strength, and flexibility. To begin with, ductile iron pipe is made from a different iron alloy than cast iron pipe. Ductile iron contains more carbon and silicon, which gives it increased strength and durability. On the other hand, cast iron pipe is made from gray iron, which has higher carbon content but lacks the flexibility of ductile iron. Moreover, ductile iron pipe is renowned for its superior strength and resistance to impact. It can withstand higher pressures and is less likely to crack or break under heavy loads or external forces. Cast iron pipe, although strong, is more brittle and prone to fractures and failures. Another significant distinction is the flexibility of ductile iron pipe. It possesses greater flexibility and can endure bending and deformation without fracturing. This flexibility facilitates easier installation, particularly in areas with uneven terrain or where ground movement may occur. In contrast, cast iron pipe is less flexible and more rigid, making it unsuitable for applications that require flexibility. Additionally, ductile iron pipe has a smoother interior surface compared to cast iron pipe. This smoothness reduces friction, enhances flow efficiency, and minimizes the accumulation of sediment and deposits within the pipe, resulting in improved water flow and reduced maintenance needs. In conclusion, ductile iron pipe sets itself apart from cast iron pipe due to its composition, strength, flexibility, and smooth interior surface. Ductile iron offers superior strength, impact resistance, and flexibility, making it the preferred choice in various plumbing and drainage applications.

Q:The role of chromium in nodular cast iron: In the bending fatigue test of crankshaft, it is also found that the chromium containing cast nodular iron crankshaft has the characteristics of large ultimate bending moment, high safety factor, overload duration, high strength and small deformation.

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