DUCTILE IRON PIPES C Class DN150
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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 water distribution networks?
- Yes, ductile iron pipes can be used for water distribution networks. Ductile iron is a type of cast iron that has enhanced flexibility and strength, making it suitable for various applications, including water distribution systems. Ductile iron pipes have been widely used in water supply networks due to their durability, corrosion resistance, and long lifespan. They can withstand high pressure and are resistant to external loads and ground movement, which makes them ideal for underground installations. Ductile iron pipes are also commonly used for transporting potable water as they are non-toxic and do not contaminate the water supply. Furthermore, ductile iron pipes have excellent hydraulic properties, ensuring efficient water flow and minimizing friction losses. Their smooth interior surface helps to prevent the buildup of deposits, reducing the risk of clogging and maintaining a consistent water flow. Overall, ductile iron pipes provide an effective and reliable solution for water distribution networks, ensuring the safe and efficient transportation of water to communities and industries.
- Q: How are ductile iron pipes transported and stored?
- To ensure the safety and integrity of ductile iron pipes, a systematic and cautious approach is taken during their transportation and storage. Typically, specialized vehicles such as flatbed trucks or trailers are used to transport ductile iron pipes. These vehicles are specifically designed to accommodate the size and weight of the pipes. They are equipped with securing mechanisms that effectively prevent any movement or damage during transit. Forklifts or cranes are used to load the pipes onto the vehicles, ensuring proper support and balance to prevent bending or deformation. To protect the pipes from external factors that may cause damage, measures are taken during transportation. Covers or wraps are placed over the pipes to shield them from adverse weather conditions such as rain, snow, or excessive sunlight. Straps or chains are also used to secure the pipes, preventing any shifting or rolling during transit. During storage, ductile iron pipes are stacked horizontally on specially designed racks or supports. This ensures even weight distribution and minimizes the risk of deformation or stress on the pipes. The storage area must be clean, dry, and well-ventilated to prevent corrosion or deterioration. It is crucial to handle ductile iron pipes with care to avoid impact or rough handling that could result in cracks or fractures. Workers involved in the transportation and storage process must receive proper training to ensure they adhere to protocols and use the necessary equipment, including lifting machinery and protective gear. Regular inspections of transported and stored ductile iron pipes are necessary to identify any signs of damage or corrosion. This allows for timely repairs or replacements, preventing any issues when the pipes are installed for their intended use. In conclusion, the transportation and storage of ductile iron pipes necessitate meticulous planning, appropriate equipment, and adherence to safety protocols to maintain their condition and performance.
- Q: The difference between spheroidal graphite cast iron pipe and HDPE water supply pipe
- (4) HDPE pipes do not need corrosion protection. If the water supply pipeline is made of ductile iron pipe, the inner and outer walls of the ductile iron pipe shall be treated with corrosion protection.(5) the normal service life of the ductile iron pipe is 20~25 years after the pipe is treated by inner and outer walls. The HDPE tube has no corrosion, and the normal service life is 50 years.
- Q: What are the different corrosion protection options for ductile iron pipe?
- To ensure the longevity and durability of ductile iron pipes, there are several options available for corrosion protection. These options are as follows: 1. Cement Mortar Lining: A layer of cement mortar is applied to the inner surface of the pipe, creating a barrier against corrosive elements in water or soil. This lining offers excellent corrosion resistance and can endure for many decades. 2. Polyethylene Encasement: The ductile iron pipe is wrapped with a layer of polyethylene material, which acts as a physical shield against external corrosive elements. This method is commonly employed in aggressive soil conditions and provides long-lasting protection. 3. Internal and External Coatings: Different types of coatings, such as epoxy, polyurethane, or fusion-bonded epoxy (FBE) coatings, can be applied to the inner and outer surfaces of the pipe to resist corrosion. These coatings form a barrier that prevents the pipe from corroding in the surrounding environment. 4. Cathodic Protection: An electrical current is utilized to safeguard the pipe from corrosion. Cathodic protection systems can be either galvanic (sacrificial anode) or impressed current systems. These systems control the flow of electrons, preventing the oxidation of the ductile iron pipe. 5. Zinc Coating: Also known as galvanizing, this method involves applying a layer of zinc to the surface of the ductile iron pipe. Zinc acts as a sacrificial anode, corroding instead of the iron pipe. Zinc coating is particularly effective in soil conditions with low resistivity, offering reliable corrosion protection. It is crucial to consider various factors such as the environment, water chemistry, soil conditions, and expected service life when choosing a corrosion protection option for ductile iron pipes. Consulting with corrosion protection specialists and engineers can assist in selecting the most suitable option for specific applications.
- Q: How are ductile iron pipes connected or jointed together?
- Ductile iron pipes are typically connected or jointed together using various methods such as flanged joints, push-on joints, mechanical joints, or restrained joints. These methods ensure a secure and leak-free connection between the pipes, providing a reliable and durable pipeline system.
- Q: Can ductile iron pipes be used in underground installations?
- Indeed, underground installations can utilize ductile iron pipes. These pipes are frequently employed in a multitude of subterranean scenarios, such as water distribution systems, sewer systems, and underground fire mains. Their notable attributes encompass robustness, endurance, and resistance to both external strains and corrosion, rendering them fitting for underground installations. Moreover, ductile iron pipes exhibit remarkable adaptability to ground movements and possess the capacity to endure substantial traffic loads. Consequently, they represent a dependable option for underground installations, particularly when stability and longevity emerge as pivotal considerations.
- Q: What is the difference between flexible joint mechanism and seismic cast iron pipe DN100 and ductile iron pipe?
- The ball compressive strength of ductile iron pipe is much higher than that of cast iron pipes, buried in the ground, the car is not easy to be crushed.
- Q: How does ductile iron pipe handle thermal expansion and contraction?
- The effectiveness of ductile iron pipe in dealing with thermal expansion and contraction is well-known. This is primarily due to its unique material properties and design characteristics. To begin with, it is worth noting that ductile iron pipe has a high coefficient of linear expansion. This means that it experiences relatively more expansion and contraction compared to other materials when exposed to temperature changes. As a result, the pipe is able to accommodate thermal expansion and contraction without causing excessive stress or deformation. Furthermore, the design of ductile iron pipes includes flexible joints. These joints, such as push-on or mechanical joints, are capable of absorbing the movement caused by thermal expansion and contraction. By providing a certain level of flexibility, these joints enable the pipe to expand and contract within a specific range without compromising its structural integrity. Additionally, the material composition of ductile iron itself plays a significant role in its ability to handle thermal expansion and contraction. Ductile iron is a type of cast iron alloy that contains nodular graphite in its microstructure. This composition provides the pipe with enhanced ductility and tensile strength. As a result, the pipe is able to withstand the stresses induced by thermal expansion and contraction without fracturing or breaking. Overall, ductile iron pipe is designed and produced in a manner that allows it to effectively deal with thermal expansion and contraction. Its high coefficient of linear expansion, flexible joints, and ductile material properties all work together to ensure that the pipe can accommodate temperature changes without causing any significant issues or structural failures.
- Q: How are ductile iron pipes protected against external damage?
- Ductile iron pipes are protected against external damage through a combination of various protective measures. One common method used is the application of a protective coating on the external surface of the pipe. This coating acts as a barrier, preventing the direct contact of the pipe with corrosive elements in the surrounding environment. The coating can be made of materials such as epoxy, polyurethane, or zinc, which provide excellent resistance against corrosion, abrasion, and chemical attacks. Additionally, ductile iron pipes can be further protected by encasing them in a concrete or cement mortar lining. This lining provides an extra layer of protection, reducing the chances of physical damage due to external impacts or soil movement. The concrete or cement mortar lining also helps to improve the pipe's hydraulic performance by reducing friction and maintaining a smooth flow of water or other fluids. Furthermore, ductile iron pipes are often installed with proper bedding and backfilling techniques. This involves using suitable materials such as sand or gravel to support and stabilize the pipe, minimizing the risk of external damage caused by uneven ground settlement or heavy loads. Adequate compaction of the backfill material is crucial to ensure the long-term integrity and stability of the pipe. Regular inspection and maintenance are also essential for protecting ductile iron pipes against external damage. Periodic inspections can identify any signs of corrosion, coating degradation, or physical damage, allowing for timely repairs or replacement before significant issues arise. Additionally, proper cathodic protection systems can be employed to prevent corrosion by applying an electric current that counteracts the electrochemical reactions occurring on the pipe's surface. In summary, ductile iron pipes are protected against external damage through the application of protective coatings, concrete or cement mortar linings, proper bedding and backfilling techniques, and regular inspections and maintenance. These measures collectively ensure the durability, longevity, and reliable performance of ductile iron pipes in various environments and applications.
- Q: What are the typical joint restraint systems used in ductile iron pipes?
- The typical joint restraint systems used in ductile iron pipes include mechanical joint restraints, push-on joint restraints, and restrained joint systems. 1. Mechanical Joint Restraints: These systems use mechanical devices to secure the pipe joints. The most common type of mechanical joint restraint is the gland-type restraint, which consists of a gland and a follower. The gland is placed over the pipe joint and tightened using bolts, creating a tight seal and preventing movement. 2. Push-On Joint Restraints: Push-on joint restraints utilize a rubber gasket to create a watertight seal between the pipe sections. These restraints do not require any additional devices or bolts to secure the joint. The gasket creates enough friction and compression to prevent the pipe from separating. 3. Restrained Joint Systems: Restrained joint systems provide a high level of joint integrity and resistance to longitudinal movement. These systems typically use a combination of mechanical joint restraints and push-on joint restraints. They may also incorporate additional elements such as harnesses, rods, or wedges to provide extra support and prevent joint separation. It is important to note that the specific joint restraint system used in ductile iron pipes may vary depending on the application, pipe diameter, and operating conditions. The selection of the appropriate joint restraint system is crucial to ensure the structural integrity and longevity of the pipeline.
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DUCTILE IRON PIPES C Class DN150
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
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