DUCTILE IRON PIPE DN350 K8

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Loading Port:: China Main Port

Payment Terms:: TT or LC

Min Order Qty:: 20 m.t.

Supply Capability:: -

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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

Our main material are all carbon steel and alloy steel.

Q: Can ductile iron pipes be used for underground fire hydrant systems?: Indeed, underground fire hydrant systems can utilize ductile iron pipes. Renowned for their robustness and endurance, ductile iron pipes are well-suited for subterranean usage. They exhibit remarkable resistance against corrosion and possess the ability to endure significant pressures, both of which are indispensable prerequisites for fire hydrant systems. Moreover, ductile iron pipes boast an extended lifespan, diminishing the necessity for frequent replacements and upkeep, thereby rendering them a financially prudent option for fire hydrant systems.

Q: How are ductile iron pipes protected against external corrosion?: Ductile iron pipes are protected against external corrosion through a combination of manufacturing processes and external coatings. The first line of defense is the inherent corrosion resistance of ductile iron itself. The iron is treated with a special alloying element, typically magnesium, which forms a protective layer on the surface of the pipe. This layer acts as a barrier against corrosion and helps to extend the lifespan of the pipe. In addition to the corrosion-resistant properties of the iron, ductile iron pipes are also externally coated with protective materials. One common method is to apply a layer of asphaltic or bituminous coating to the pipe's surface. This coating acts as a barrier against moisture and corrosive substances in the soil, preventing them from coming into contact with the iron. It also provides a layer of insulation, reducing the likelihood of galvanic corrosion. Another method of external corrosion protection is the use of fusion-bonded epoxy (FBE) coatings. FBE is a thermosetting resin that is applied to the surface of the pipe and then heat-cured to form a strong and durable coating. This coating provides excellent resistance against corrosion, abrasion, and impact, making it a popular choice for ductile iron pipes in harsh environments. In some cases, additional protective measures such as cathodic protection systems may be employed. These systems use electric currents to counteract the corrosion process by supplying electrons to the pipe's surface. This helps to prevent corrosion from occurring, especially in areas where the coating may have been damaged or compromised. Regular maintenance and inspection are also crucial in ensuring the long-term protection of ductile iron pipes against external corrosion. This includes periodic cleaning, repair of any coating damages, and monitoring the integrity of the protective layers. Overall, the combination of the inherent corrosion resistance of ductile iron, external coatings, and maintenance practices ensures that ductile iron pipes are well-protected against external corrosion, allowing them to have a longer lifespan and deliver reliable performance in various applications.

Q: Can ductile iron pipes be used for trench crossings?: Indeed, trench crossings can utilize ductile iron pipes. Renowned for their remarkable strength and durability, ductile iron pipes prove to be fitting for a diverse array of purposes, including trench crossings. Their capacity to endure substantial burdens and external pressures renders them an optimal selection for subterranean installations. Moreover, ductile iron pipes boast exceptional resistance to corrosion, guaranteeing their enduring and dependable performance in the context of trench crossings.

Q: What is the difference between spheroidal graphite cast iron QT400-15 and QT400-15A? What does the A mean later?: The front is the material grade, and the back of the A should have special requirements.

Q: Can ductile iron pipes be used in areas with high groundwater levels?: Yes, ductile iron pipes can be used in areas with high groundwater levels. Ductile iron pipes are known for their durability and strength, making them suitable for various underground applications, including areas with high water tables. They have a robust construction that can withstand external pressures and corrosive environments, making them an excellent choice for water and wastewater systems in such areas.

Q: A tube is used only in ductile iron pipes, isn't it?: Is that the nodular graphite cast iron pipe is called centrifugal ductile iron pipe, it has the properties of nature, iron and steel, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc.. Water supply pipe is the first choice, with high cost performance.

Q: What is the expected deflection limit of ductile iron pipes?: The expected deflection limit of ductile iron pipes varies depending on several factors such as pipe diameter, wall thickness, and soil conditions. However, general industry standards suggest that ductile iron pipes should not exceed a deflection limit of 2% for underground installations. This means that the maximum allowable deflection would be 2% of the pipe's diameter. It is important to note that exceeding the deflection limit can lead to potential issues such as reduced flow capacity, increased risk of pipe failure, and compromised structural integrity. Therefore, it is crucial to carefully consider and adhere to the recommended deflection limits during the design and installation of ductile iron pipes to ensure their long-term performance and reliability.

Q: How do ductile iron pipes handle concentrated loads?: Ductile iron pipes are highly resistant to concentrated loads due to their inherent strength and flexibility. They have the ability to distribute the load over a larger area, minimizing the risk of failure or damage. This makes them suitable for handling heavy loads and ensuring long-term durability in various applications.

Q: Are ductile iron pipes suitable for installation in areas with high soil settlement and consolidation?: Ductile iron pipes are generally considered suitable for installation in areas with high soil settlement and consolidation. One of the key advantages of ductile iron pipes is their ability to withstand external loads and accommodate ground movement. Ductile iron pipes are known for their high strength and flexibility, making them more resistant to soil settlement and consolidation compared to other pipe materials. They have a higher tensile strength and can withstand heavy loads and ground vibrations without cracking or breaking. This makes them suitable for areas where the soil is prone to settlement and consolidation. Furthermore, ductile iron pipes have a high resistance to corrosion and can withstand aggressive soil conditions, which is often associated with areas prone to settlement and consolidation. They are also less susceptible to damage from external factors such as roots or rocks, which further enhances their suitability for installation in such areas. It is important, however, to consider the specific conditions of the site and consult with engineers or experts familiar with the local soil conditions. Factors such as the magnitude and rate of settlement, soil type, groundwater levels, and construction methods should be taken into account when determining the appropriateness of ductile iron pipes for installation in areas with high soil settlement and consolidation. In conclusion, ductile iron pipes are generally suitable for installation in areas with high soil settlement and consolidation. Their high strength, flexibility, resistance to corrosion, and ability to withstand external loads make them a reliable choice for such conditions. Nonetheless, it is always recommended to assess the specific site conditions and consult with professionals to ensure the most appropriate pipe material is chosen for each project.

Q: How to properly maintain FRP pipes: The wall of the pipe is smoothReduce flow resistance, increase flow speed and reduce energy consumption. Compared with the same size steel pipe, the flow rate of the same volume can be increased by about 10%, and no fouling and long-term use can not reduce the flow rate. The protection of cables in interference and heavy corrosion environment is better.

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