DUCTILE IRON PIPE DN1100 K9/C

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Specification:

1) The standard of pipe: ISO2531:1998, K9

2) Effective length: 6m

3) Inner cement line: Portland cement line as per ISO4179

4) Zinc coating: at least 130g/m² as per ISO8179

5) Bitumen painting: at least 70um as per ISO8179

6) With 100% quantity of NBR ring, or SBR ring, or EPDM ring as per ISO4633

7) DN80mm-800mm

8) High strength, lighter than grey iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life tome about 100 yeas

9) Produced by Hangzhou chunfeng machine

10) Checked by automatic inspection equipment

11) Composition:

Chemical composition
Chemical composition	Ductile Cast Iron Pipe (%)	Grey iron pipe (%)	Steel pipe (%)
C	3.5-4.0	3.2-3.8	0.1-0.2
Si	1.9-2.6	1.4-2.2	0.15-0.4
Mn	0.15-0.45	0.4-0.6	0.3-0.6
P	≤0.06	≤0.3	0.02-0.03
S	≤0.02	≤0.1	0.02-0.03
Mg	0.03-0.06

12) Feature:

Mechanical properties
	Ductile Cast Iron Pipe	Grey Iron Pipe	Steel Pipe
Tensile Strength(Mpa)	≥420	150-260	≥400
Yield Strength(Mpa)	≥300	No Confirmation	No Confirmation
Bending Strength(Mpa)	≥590	200-360	≥400
Elongation (%)	≥10	Neglected	≥18
Brinell Hardness(HBS)	≤230	≤230	About 140

13) T type mechanical joint

14) Packing: in bulk or container

Q: Are ductile iron pipes suitable for use in acidic environments?: Ductile iron pipes are generally not suitable for use in highly acidic environments. While ductile iron is known for its strength and durability, it does have limitations when it comes to acidic conditions. Acidic environments tend to corrode and degrade ductile iron pipes over time. In acidic conditions, the acid can react with the iron in the pipe, causing corrosion and ultimately leading to pipe failure. The rate of corrosion depends on various factors such as the concentration and type of acid, temperature, and the duration of exposure. Acidic environments with pH levels below 4 or 5 can significantly accelerate the corrosion process. To overcome this limitation, other materials like stainless steel or corrosion-resistant alloys such as PVC or HDPE (high-density polyethylene) pipes are often recommended for use in acidic environments. These materials have better resistance to corrosion and can withstand the harsh conditions associated with acidic environments. However, if ductile iron pipes are used in mildly acidic conditions or if measures are taken to protect them from corrosion, they may still be suitable. Applying protective coatings or linings to the pipes can help minimize the corrosive effects of acids. It is essential to consult with experts or engineers familiar with the specific conditions and requirements of the project to determine the most suitable material for use in acidic environments.

Q: How do ductile iron pipes handle thermal cycling in industrial applications?: Ductile iron pipes are well-suited for handling thermal cycling in industrial applications. Due to their high thermal conductivity and low thermal expansion coefficient, they can effectively and safely withstand the stresses caused by repeated heating and cooling cycles. This makes them highly resistant to cracking, distortion, or other forms of thermal damage, ensuring their durability and reliability in industrial environments.

Q: Can ductile iron pipes be used for potable water systems?: Indeed, potable water systems can utilize ductile iron pipes. Ductile iron, which undergoes treatment with magnesium to enhance its strength and flexibility, characterizes this type of iron. These pipes are esteemed for their robustness, resistance to corrosion, and ability to endure high pressure. They are frequently employed in water distribution systems, inclusive of potable water supply. Nevertheless, guaranteeing that the ductile iron pipes employed in potable water systems adhere to the requisite standards and regulations set by local authorities, such as NSF/ANSI 61 for drinking water system components, is of utmost importance. Consistent maintenance and regular testing are also indispensable to ensure the ongoing safety and excellence of the potable water system.

Q: Are ductile iron pipes more expensive than other pipe materials?: Yes, ductile iron pipes are generally more expensive than other pipe materials such as PVC or HDPE. However, they offer superior strength, durability, and longevity, making them a cost-effective choice in the long run for applications that require high pressure or corrosive resistance. Additionally, ductile iron pipes have a lower life cycle cost due to their reduced maintenance and repair needs.

Q: How do ductile iron pipes handle cyclic loading in offshore applications?: Ductile iron pipes are known for their exceptional strength and durability, making them a suitable choice for various applications, including offshore use. When it comes to handling cyclic loading in offshore environments, ductile iron pipes have several characteristics that contribute to their performance. Firstly, ductile iron pipes have a high resistance to fatigue failure. Fatigue failure occurs when a material experiences repeated cycles of stress, which can cause cracks to initiate and propagate over time. Ductile iron pipes are designed to withstand cyclic loading without compromising their structural integrity, thanks to their inherent ductility and ability to absorb and distribute stress effectively. Additionally, ductile iron pipes possess excellent impact resistance. Offshore environments are prone to dynamic and unpredictable forces, such as waves and currents, which can exert sudden and high impact loads on the pipes. The high impact resistance of ductile iron allows it to withstand these forces without deformation or fracture, ensuring the pipes remain intact and functional. Moreover, ductile iron pipes have a unique microstructure that enables them to resist corrosion. Offshore applications expose pipes to harsh environmental conditions, including saltwater, which can accelerate the corrosion process. However, the protective graphite matrix in ductile iron pipes acts as a barrier, preventing corrosive agents from reaching the underlying metal and significantly extending the pipes' service life. Furthermore, ductile iron pipes have a high load-carrying capacity. In offshore applications, pipes often need to support heavy loads, such as those from equipment, structures, or seabed settlements. Ductile iron's superior strength allows it to bear these loads effectively, maintaining the structural integrity and stability of the system. Lastly, ductile iron pipes offer ease of installation and maintenance. Their lightweight nature makes them easier to handle and transport during offshore operations. Additionally, their corrosion resistance minimizes the need for frequent maintenance, reducing downtime and costs associated with repairs and replacements. In conclusion, ductile iron pipes exhibit excellent performance in handling cyclic loading in offshore applications. Their resistance to fatigue failure, impact resistance, corrosion resistance, high load-carrying capacity, and ease of installation and maintenance make them a reliable and efficient choice for offshore environments.

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: What are the advantages of using ductile iron pipe over HDPE pipe?: Ductile iron pipe offers numerous benefits compared to HDPE pipe. Firstly, it is renowned for its exceptional strength and durability. With the ability to withstand higher pressure, it is less prone to leakage or bursting, making it an ideal choice for applications requiring high-pressure water or gas transmission, such as municipal water supply systems or industrial piping networks. Secondly, ductile iron pipe boasts an extended lifespan when compared to HDPE pipe. Its remarkable resistance to corrosion allows it to endure for decades, even in harsh environmental conditions. As a result, frequent replacements are minimized, leading to long-term cost savings. Furthermore, ductile iron pipe exhibits excellent fire resistance properties. It can endure high temperatures without compromising its structural integrity, making it a reliable option for applications where fire safety is a concern, such as fire hydrant systems or sprinkler systems. Additionally, ductile iron pipe is renowned for its superior flow characteristics. Its smooth inner surface reduces friction loss, facilitating efficient and consistent fluid flow. This attribute is particularly crucial in applications that necessitate maximum flow capacity, such as water distribution systems or wastewater treatment plants. Moreover, ductile iron pipe is highly recyclable, promoting environmental sustainability. It can be melted down and utilized to manufacture new pipes, thereby reducing its environmental impact. In conclusion, ductile iron pipe offers a multitude of advantages over HDPE pipe, including its exceptional strength and durability, prolonged lifespan, fire resistance, superior flow characteristics, and recyclability. These features establish ductile iron pipe as the preferred choice for various applications, particularly those that require high-pressure transmission, longevity, fire safety, efficient flow, and environmental sustainability.

Q: How are ductile iron pipes inspected for quality control?: To guarantee compliance with industry standards, ductile iron pipes undergo a series of rigorous tests and inspections for quality control. Trained inspectors conduct visual inspections, carefully examining the pipes for visible defects like cracks, pits, or surface irregularities. This process aims to identify any visual flaws that could compromise the overall quality of the pipes. Dimensional inspection is another crucial quality control measure. Specialized tools and equipment are used to measure the pipes' dimensions, including diameter, wall thickness, and length. By comparing these measurements to specified tolerances, any deviations can be detected, and necessary corrective actions can be taken. Hydrostatic pressure testing is an important step in quality control. The pipes are subjected to internal pressure higher than their intended operating pressure to ensure they can withstand the required pressure without any leakage or failure. This test involves filling the pipes with water and gradually increasing the pressure while closely monitoring for any signs of leakage or deformation. Furthermore, mechanical tests such as tensile strength testing and impact testing are conducted to evaluate the pipes' mechanical properties. Controlled forces or impacts are applied to the pipes, and their response is measured. This allows for the assessment of the pipes' strength, toughness, and durability, ensuring they meet the necessary requirements. Metallurgical examinations are also carried out to analyze the microstructure of the ductile iron pipes. Samples are taken from the pipes, and microscopy techniques are used to examine the grain structure, phase distribution, and any potential defects at a microscopic level. This process helps identify any issues that may not be visible to the naked eye but could affect the overall quality of the pipes. Overall, the inspection process for ductile iron pipes encompasses a combination of visual, dimensional, hydrostatic, mechanical, and metallurgical tests. These quality control measures ensure that the pipes meet the required standards, providing reliable and durable infrastructure for various applications.

Q: Can ductile iron pipes be used for dam construction?: Yes, ductile iron pipes can be used for dam construction. Ductile iron pipes are known for their durability, strength, and corrosion resistance, making them suitable for various applications including dam construction. These pipes can withstand high pressure and are capable of handling the water flow required for dam operations. Additionally, their flexibility allows for easy installation and maintenance, making them a viable choice for constructing dams.

Q: What is the difference between cast iron pipe and seamless steel pipe and galvanized steel pipe?: Cast iron pipe: cast pipe made of cast iron. Cast iron pipes are used for water supply, drainage and gas transmission lines. They include cast iron pipes and pipe fittings. Labor intensity is small. According to the casting method, it is divided into continuous cast iron pipe and centrifugal cast iron pipe, in which the centrifugal cast iron pipe is divided into sand mould and metal type two kinds. 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.

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