DUCTILE IRON PIPE DN400 K8

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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 irrigation gate systems?: Yes, ductile iron pipes are suitable for use in irrigation gate systems. Ductile iron is known for its durability, strength, and corrosion resistance, making it an ideal choice for applications requiring reliable and long-lasting piping systems like irrigation gate systems. Additionally, ductile iron pipes have excellent flow characteristics, allowing for efficient water distribution in irrigation systems.

Q: QT400-10 nodular cast iron requires hardness of HRC47~51. Why can't quench hardness be reached?: Quenching temperature: when the silicon content of nodular cast iron is 2.0-3.0%, the quenching temperature is 860-900 DEG C, the silicon content is low, and the upper limit is taken when the lower limit is high.2. holding time: because of the consideration of diffusion graphite cast iron, alloy steel is therefore the holding time, holding time longer than carbon steel.3. oil quenching.

Q: Are ductile iron pipes resistant to acid attacks?: Generally, ductile iron pipes exhibit resistance to acid attacks. Ductile iron, a form of cast iron which has undergone magnesium treatment to enhance its strength and ductility, produces a more durable material capable of withstanding corrosive conditions, including acids. Nevertheless, it is crucial to acknowledge that the resistance level may vary depending on the specific acid type and concentration involved. In highly corrosive environments, where powerful acids or high concentrations are present, it may be necessary to implement additional protective measures such as applying a lining or coating to the pipes. Moreover, regular inspection and maintenance are vital to ensure the long-term durability and resistance of ductile iron pipes.

Q: Is it better to use steel tubes or ductile iron pipes for water supply?: You need a definite environment to say which kind of pipe is good!1, ductile iron pipe is cheap, corrosion resistance, lack of toughness is poor, not easy to process;

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 is a strong and durable material that is commonly used for underground piping systems. It has excellent resistance to corrosion, making it suitable for applications where the pipes will be exposed to moisture and water. Additionally, ductile iron pipes have high tensile strength, which allows them to handle heavy loads and withstand the pressure exerted by vehicles in a parking lot. Therefore, using ductile iron pipes for underground parking lot drainage is a reliable and long-lasting solution.

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: 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: Does the cast iron have size 250? What's the performance?: Ductile iron does not have size 250. Ductile iron is the beginning of QT, QT400-15, QT450-10, QT500-7 is the general use of nodular cast iron brand. Nodular cast iron welding can be determined, this should be in some high strength cast iron equipment used more, the tensile strength of normally ductile cast iron welding in welding is higher, is worse than the grey cast iron, it is actually very difficult to distinguish with the naked eye is ductile iron or cast iron the iron in the repair equipment, we usually use WE777 special cast iron electrode universal wide welding, but it is only for maintenance use, the effect is really good, reducing the risk of cracking and high strength welding rod matching to ensure the strength of welding seam.

Q: How does ductile iron pipe perform in extreme weather conditions?: Ductile iron pipes are known for their exceptional performance in extreme weather conditions. These pipes exhibit a high level of durability, resistance, and flexibility, making them suitable for withstanding harsh weather conditions such as extreme temperatures, heavy rain, snow, and even earthquakes. One of the key attributes of ductile iron is its ability to resist damage from freezing temperatures. Unlike other materials, ductile iron pipes have a low coefficient of thermal expansion, enabling them to withstand the expansion and contraction that occurs during freeze-thaw cycles without cracking or breaking. This ensures the pipes remain intact and continue to perform optimally even in frigid conditions. Additionally, ductile iron pipes have excellent corrosion resistance, making them highly resilient against the corrosive effects of extreme weather. They are protected by a durable zinc coating, which acts as a barrier against rust and other forms of corrosion. This coating, combined with the inherent strength of ductile iron, makes these pipes highly resistant to the corrosive effects of rain, snow, and moisture. Moreover, ductile iron pipes possess superior flexibility, allowing them to accommodate ground movement and seismic activity. In regions prone to earthquakes or shifting soil, these pipes can absorb the stress and strain without fracturing, ensuring continuous water supply and sewerage services even in the most challenging weather conditions. Overall, ductile iron pipes excel in extreme weather conditions due to their durability, resistance to freezing, corrosion, and flexibility. Their ability to withstand the elements ensures uninterrupted water supply and sewage systems, providing reliability and peace of mind to utilities and communities even in the harshest environments.

Q: Do ductile iron pipes have inner enamel?: For fire water and living water supply, low requirement is lined with cement mortar, some high can be lined with epoxy resin, epoxy ceramic lining, as well as cement mortar lining epoxy sealing layer (compromise is the price of blame).

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