DUCTILE IRON PIPE AND PIPE FITTINGS K8 CLASS DN100

DUCTILE IRON PIPE AND PIPE FITTINGS K8 CLASS DN100

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 23 pc

Supply Capability:: 3000 pc/month

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Material : Ductile Cast Iron
Size Range : DN 80mm to DN 2000mm
Unit Effective Length : 6m or 5.7m
Manufacture Standard: ISO 2531:1998/ EN 545:2006/EN 598:2007
Annual capacity : 200,000 tons
Coating Exterior: Zinc 130g/m2 according to ISO 8179-1 and bitumen coating 70 microns.
Cement Interior: Portland Cement/ High Alumina Cement/ Sulphate Resisting Cement Lining according to ISO 4179
Special requirements on external coating and internal lining can be applied
We also provide accessories such as SBR/EPDM rubber gaskets, lubricant paste, pipe caps, PE sleeves, etc.

Additional Parts:

Each pipe is strictly inspected according to related standard to ensure permanently high performance.
Easy Installation at site and service free for life
Long Service Lifespan
Quotation will arrive you within 24hours once we get your inquiry.
We guarantee offering you a competitive price.
A copy of original inspection reports of pipes will be offered after shipment.
Photos of loading process will be sent to the customer after shipment effect.
We will follow-up the delivery progress after shipment effect and update to the customer on weekly basis.

Q: How do ductile iron pipes perform in acidic soil conditions?: Ductile iron pipes have a reputation for being durable and resistant to different environmental conditions, including acidic soil conditions. When exposed to acidic soil, these pipes exhibit excellent resistance to corrosion due to their unique composition and protective coating. The high carbon content in ductile iron pipes gives them inherent resistance to corrosion, even in acidic environments. Additionally, these pipes are typically lined with cement mortar or a suitable epoxy coating, which provides an extra layer of protection against acid attack. The combination of the high carbon content and protective coating creates a barrier that prevents direct contact between the acid and the iron, thus minimizing the risk of corrosion. This ensures that the pipes remain structurally sound and maintain their integrity over a long period of time. Furthermore, ductile iron pipes have a long service life and are designed to withstand a wide range of soil conditions. Their strength and flexibility enable them to endure the stresses and strains caused by the surrounding soil, including acidic soil environments. This makes them an ideal choice for applications in soils with higher acidity levels. It is important to note that while ductile iron pipes perform well in acidic soil conditions, the severity and concentration of the acid can affect their performance. In extremely aggressive or highly concentrated acidic environments, additional corrosion protection measures may be necessary, such as sacrificial anodes or cathodic protection systems. In conclusion, ductile iron pipes are highly resilient and excel in acidic soil conditions. Their corrosion resistance, combined with their strong structure and protective coating, ensures their longevity and reliability, making them a preferred choice for various applications in such environments.

Q: Are ductile iron pipes suitable for high-temperature applications?: No, ductile iron pipes are not typically suitable for high-temperature applications as they have a lower melting point compared to other materials like steel.

Q: What are the different methods for testing ductile iron pipe?: There are several methods available for testing ductile iron pipe to ensure its quality and reliability. These methods include: 1. Hydrostatic Testing: This is the most common method used for testing ductile iron pipe. It involves filling the pipe with water and pressurizing it to a specified level. The pipe is then inspected for any leaks or deformations under the applied pressure. Hydrostatic testing helps determine the pipe's ability to withstand internal pressure without failure. 2. Tensile Testing: This method involves subjecting a sample of the ductile iron pipe to a gradually increasing tensile load until it fractures. The test measures the ultimate tensile strength, yield strength, and elongation of the material. Tensile testing helps evaluate the pipe's mechanical properties and its ability to withstand tension without breaking. 3. Hardness Testing: This method measures the hardness of the ductile iron pipe using various techniques such as Brinell, Rockwell, or Vickers hardness tests. Hardness testing provides information about the material's resistance to deformation, wear, and fatigue. It helps assess the pipe's durability and resistance to external forces. 4. Impact Testing: This method involves striking a notched sample of the ductile iron pipe with a pendulum or falling weight to measure its impact resistance. The test determines the material's ability to absorb energy during sudden loading or impact. Impact testing helps evaluate the pipe's ability to withstand accidental impacts or dynamic loads. 5. Ultrasonic Testing: This non-destructive testing method uses high-frequency sound waves to detect internal defects or discontinuities in the ductile iron pipe. Ultrasonic testing can identify voids, cracks, or inclusions that may affect the pipe's structural integrity. It helps ensure the pipe's soundness and reliability. 6. Magnetic Particle Testing: This method is primarily used for detecting surface or near-surface defects in the ductile iron pipe. It involves applying a magnetic field to the pipe and then applying magnetic particles to the surface. Any defects present will cause the magnetic particles to gather and form visible indications. Magnetic particle testing helps identify surface cracks, laps, or other defects that may affect the pipe's performance. These different testing methods help ensure that ductile iron pipe meets industry standards and specifications, ensuring its quality and reliability in various applications.

Q: What is the expected cyclic fatigue life of ductile iron pipes?: Various factors such as material composition, pipe design, loading conditions, and environmental factors can affect the expected cyclic fatigue life of ductile iron pipes. However, ductile iron pipes are widely recognized for their exceptional ability to withstand fatigue. Ductile iron pipes are specifically engineered to endure cyclic loading, which is common in water distribution and sewer systems due to fluctuating pressures and vibrations. These pipes possess a unique microstructure that confers high strength and ductility, enabling them to resist crack formation and growth under cyclic loading. Numerous studies and industry standards have provided estimates for the expected cyclic fatigue life of ductile iron pipes. For instance, the American Water Works Association (AWWA) C151 standard recommends a design life of 100 years for ductile iron pipes used in water distribution systems, underscoring their long-term durability and resistance to fatigue. Furthermore, research studies have demonstrated that ductile iron pipes can withstand over 1 million cycles of loading without exhibiting any signs of fatigue failure. The fatigue strength of ductile iron pipes can be further augmented by employing protective coatings or linings to reduce the impact of corrosion and abrasion. Nevertheless, it is important to recognize that various factors, such as manufacturing quality, installation practices, and maintenance procedures, can influence the expected cyclic fatigue life of ductile iron pipes. Regular inspections, appropriate handling, and adherence to recommended installation guidelines can help ensure the longevity and performance of ductile iron pipes. In conclusion, while the expected cyclic fatigue life of ductile iron pipes can be subject to variation due to several factors, these pipes are generally renowned for their outstanding fatigue resistance and offer a dependable and enduring solution for water distribution and sewer systems.

Q: What is the excavation width of ductile iron pipes with diameters greater than 1400?: Then, according to the soil characteristics, different slopes are calculated, and the width of the excavation is calculated according to the depth and slopeIf the soil is soft, high water content and easy to collapse, the excavation width will be wide, otherwise the slope will be steep and the excavation width will be narrow

Q: What are the typical bedding and backfill requirements for ductile iron pipes?: The typical bedding and backfill requirements for ductile iron pipes involve using a granular material, such as sand or gravel, to provide proper support and cushioning for the pipe. The bedding material should be placed evenly around the entire circumference of the pipe, ensuring that it is in direct contact with the bottom of the pipe and extending to a certain height above it. Backfill material, on the other hand, is used to fill the remaining space around the pipe and should be placed in layers and compacted to prevent settlement. Additionally, proper compaction and compaction equipment should be used to ensure the stability and long-term performance of the ductile iron pipes.

Q: What is the typical diameter range of ductile iron pipes?: The typical diameter range of ductile iron pipes is between 4 inches and 64 inches.

Q: How does ductile iron pipe perform in areas with high water hammer?: Ductile iron pipe performs exceptionally well in areas with high water hammer. The strength and durability of ductile iron allow it to withstand the forceful impact of water hammer without any significant damage. Water hammer refers to the sudden increase in pressure caused by the rapid change in water flow direction or velocity, often occurring when valves are closed quickly. This abrupt change in pressure can lead to significant stress on pipes, potentially causing them to rupture or fail. However, ductile iron pipes have excellent impact resistance due to their unique composition and manufacturing process. They are made from a combination of iron, carbon, and small amounts of other elements such as silicon and magnesium. The graphite nodules formed during the manufacturing process give ductile iron its superior strength and flexibility, making it less prone to cracking or breaking under pressure. In areas with high water hammer, ductile iron pipe's inherent strength and resilience allow it to absorb and dissipate the force generated by water hammer events. Its ability to withstand the sudden pressure changes helps to prevent pipe failure, minimizing the risk of leaks or bursts. Additionally, the smooth internal surface of ductile iron pipes reduces the likelihood of water hammer occurrences by minimizing turbulence and maintaining a more constant flow. This characteristic helps to mitigate the impact of water hammer on the pipe system. Overall, ductile iron pipe is an ideal choice for areas with high water hammer due to its exceptional strength, impact resistance, and ability to withstand sudden pressure changes. Its performance in such conditions ensures the longevity and reliability of the water distribution system.

Q: How are ductile iron pipes inspected for quality control?: Ductile iron pipes are inspected for quality control through a series of rigorous tests and inspections to ensure their compliance with industry standards. One of the most common methods used is visual inspection, where trained inspectors examine the pipes for any visible defects such as cracks, pits, or surface irregularities. This helps in identifying any visual defects that may compromise the overall quality of the pipes. In addition to visual inspection, another crucial quality control measure is dimensional inspection. This involves measuring the dimensions of the pipes, such as diameter, wall thickness, and length, using specialized tools and equipment. By comparing these measurements against the specified tolerances, any deviations can be identified, and necessary corrective actions can be taken. Another important quality control step is hydrostatic pressure testing. In this test, the pipes are subjected to internal pressure that is higher than their intended operating pressure. This ensures that the pipes can withstand the required pressure without any leakage or failure. The test involves filling the pipes with water and gradually increasing the pressure, while closely monitoring for any signs of leakage or deformation. Furthermore, ductile iron pipes undergo various mechanical tests, such as tensile strength testing and impact testing, to evaluate their mechanical properties. These tests involve applying controlled forces or impacts to the pipes and measuring their response. By doing so, the strength, toughness, and durability of the pipes can be assessed, ensuring they meet the necessary requirements. Lastly, metallurgical examinations are conducted to analyze the microstructure of the ductile iron pipes. This involves taking samples from the pipes and using microscopy techniques to examine the grain structure, phase distribution, and any potential defects at a microscopic level. This helps in identifying 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 involves a combination of visual, dimensional, hydrostatic, mechanical, and metallurgical tests. These quality control measures help ensure that the pipes meet the required standards, providing reliable and durable infrastructure for various applications.

Q: Method for cutting large diameter ductile iron pipe: When the volume ratio of oxygen and acetylene is less than 1, a carbonized flame is obtained. Because of less oxygen and incomplete combustion, the flame is longer than the neutral flame and the temperature is lower. Acetylene in the carbide flame is suitable for welding high carbon steel, cast iron and cemented carbide materials. When welding other materials with a carbide flame, the weld metal becomes hard and brittle.

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