DUCTILE IRON PIPE DN900 k9

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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 mining applications?: Yes, ductile iron pipes are suitable for use in mining applications. They possess excellent strength, durability, and resistance to corrosion, making them ideal for transporting fluids and materials in the harsh and demanding conditions of mining operations. Additionally, their ductility enables them to withstand high pressures and impacts, ensuring reliable performance and long service life in mining environments.

Q: Can ductile iron pipe be used for compressed air systems?: Yes, ductile iron pipe can be used for compressed air systems. Ductile iron is known for its durability and high strength, making it suitable for handling the pressure requirements of compressed air systems. However, it is important to consider factors such as pipe sizing, pressure ratings, and compatibility with other system components to ensure safe and efficient operation.

Q: How are ductile iron pipes protected against internal corrosion caused by chemicals?: Ductile iron pipes are protected against internal corrosion caused by chemicals through a combination of several protective measures. Firstly, these pipes are usually lined with a cement mortar lining or an epoxy coating. This lining acts as a barrier between the chemical substances in the water or sewage and the iron material of the pipe, preventing direct contact and corrosion. In addition to the lining, a corrosion-resistant polymer or bituminous coating is often applied to the exterior of the ductile iron pipes. This coating serves as an extra layer of protection, safeguarding the pipe against any external chemical exposure that may occur. Furthermore, cathodic protection is commonly employed to prevent internal corrosion. This technique involves the use of sacrificial anodes, typically made of zinc or magnesium, which are attached to the pipe. The anodes corrode over time instead of the iron, effectively sacrificing themselves to protect the pipe from corrosion caused by chemicals. Regular maintenance and monitoring of the ductile iron pipes are also crucial in preventing and addressing any potential corrosion issues. This includes routine inspections, cleaning, and repairing any damaged or corroded areas promptly. Overall, the combination of lining, external coating, cathodic protection, and maintenance practices ensures that ductile iron pipes are well-protected against internal corrosion caused by chemicals, prolonging their lifespan and ensuring the integrity of the pipeline system.

Q: Are ductile iron pipes more resistant to breaks and cracks than other pipe materials?: Ductile iron pipes generally possess higher resistance to breaks and cracks compared to other pipe materials. Ductile iron, a form of cast iron treated with magnesium, exhibits increased flexibility and reduced brittleness. This enhanced flexibility empowers ductile iron pipes to endure significant pressure and external loads without incurring damage. In contrast to widely-used pipe materials such as PVC, HDPE, or steel, ductile iron pipes excel in strength and durability. They boast higher tensile strength, enabling them to withstand greater forces and pressures without succumbing to failure. Additionally, ductile iron pipes demonstrate superior impact resistance, reducing the likelihood of cracking or breaking when subjected to sudden impacts or external loads. Another advantage of ductile iron pipes lies in their ability to resist corrosion. The material naturally repels rust and remains unaffected by harsh environmental conditions, making it ideal for underground installations or areas with corrosive soils. This corrosion resistance further contributes to the pipes' longevity and overall integrity. Furthermore, ductile iron pipes possess a longer lifespan compared to other pipe materials. They are designed to endure for multiple decades, often exceeding 50 years, with minimal maintenance. This prolonged lifespan decreases the necessity for frequent replacements, resulting in time and cost savings in the long term. However, it is crucial to acknowledge that no material is entirely immune to damage or failure. Proper installation, maintenance, and adherence to industry standards and guidelines are imperative to ensure optimal performance and longevity of ductile iron pipes. Regular inspection and monitoring should also be carried out to identify potential issues or signs of deterioration, facilitating timely repairs or replacements.

Q: How long is the service life of the cast iron pipe, and the time of use of ductile iron pipes?: When it comes to the service life of nodular cast iron, its maintenance is essential for its long service life. Then, the focus of the maintenance of ductile iron pipe is to pay special attention to, will affect the long-term use of ductile iron pipes, stable operation of socket, row, etc., we should make efforts to these aspects of the mouth without debris. Make sure that the rubber ring of the ductile iron pipe has been smashed with a rubber hammer, and it is not twisted or twisted, and it is uniformly stuck in the slot. Ductile iron pipe in the maintenance process, because of the pneumatic tube axis is buried into the ground, so in the face of a tilt angle of the time, we must be careful, if the resistance is too large, will not force the excavation, in order to prevent the distortion of the rubber ring.

Q: DN1800 can the length of ductile iron pipes be several meters? What is the total weight?: In quality, the spheroidization of cast iron pipes is controlled to be 1-3 (spheroidization rate 80%), so the mechanical properties of the cast iron pipes, ductile iron pipes and finished product libraries can be better improved, with the nature of iron and the properties of steel.

Q: Will nodular cast iron pipes rust?: Although the wall has a long flow of water, but oxygen scarce, compared with the outer wall is not easy to corrosion, but there is cement lining is necessary.

Q: How are ductile iron pipes protected against external impact or loading?: Ductile iron pipes are protected against external impact or loading through various methods and measures to ensure their durability and integrity. Some of the common ways in which ductile iron pipes are protected are: 1. Thickness and strength: Ductile iron pipes are designed with a sufficient wall thickness and high strength to withstand external loads and impacts. This ensures that the pipes can endure heavy loads and resist deformation or cracking. 2. Coatings: Ductile iron pipes are typically coated with protective layers to provide an additional barrier against external impact. These coatings can include cement mortar lining, polyethylene encasement, or epoxy coatings. These coatings not only offer impact resistance but also provide corrosion protection to the pipes. 3. Bedding and backfilling: Proper bedding and backfilling techniques are essential to protect ductile iron pipes from external loads. The pipes are correctly placed and surrounded by suitable materials like compacted granular bedding and backfill, which help distribute the external loads evenly and reduce the risk of pipe damage. 4. Trench design: The design of the trench in which the ductile iron pipes are installed is crucial for protecting them against external impact. The trench dimensions, slope stability, and proper compaction of the backfill are considered to minimize the chances of damage due to external loads. 5. Pipe layout and support: Proper pipe layout and support are vital to protect ductile iron pipes from external impact. Adequate support mechanisms like thrust blocks, pipe anchors, and pipe restraints are employed to absorb and distribute external loads, preventing any damage to the pipes. 6. Protective structures: In areas where there is a higher risk of external impact, additional protective structures are installed to safeguard the ductile iron pipes. These structures can include concrete encasements, bollards, or reinforced concrete slabs, which act as physical barriers against potential impacts. Overall, a combination of factors such as pipe strength, coatings, proper installation techniques, and support measures work together to ensure the protection of ductile iron pipes against external impact or loading. These measures enhance the longevity and reliability of the pipes, ensuring their efficient performance in various applications.

Q: Which direction should the spigot of the K9 ductile iron pipe be installed?: Compared with the PE pipe, from the installation time, ductile pipe PE pipe installation is simple and rapid, and after the installation of internal and external pressure bearing better tightness and corrosion resistance; from the point of view, ductile pipe sealing better after installation, but also can improve the corrosion resistance of corrosion protection through a variety of means; from the hydraulic performance, because ductile pipe specifications generally refers to the inner diameter of PE pipe diameter specifications generally refers to the same specifications, because under the condition of ductile pipe can achieve greater runoff; from the installation and maintenance cost, ductile pipe have more favorable price. The main components of ductile iron pipes are carbon, silicon, manganese, sulfur, phosphorus and magnesium. The inner wall of zinc spray, anti-corrosion materials such as cement mortar.

Q: Can ductile iron pipes be used for underground hydropower systems?: Yes, ductile iron pipes can be used for underground hydropower systems. Ductile iron pipes are known for their strength and durability, making them suitable for various applications, including underground installations. They have excellent resistance to corrosion and can withstand high pressure, making them ideal for carrying water in hydropower systems. Ductile iron pipes also have a long lifespan, reducing the need for frequent replacements and minimizing maintenance costs. Additionally, they have good joint integrity, ensuring leak-free connections underground. Therefore, ductile iron pipes are a reliable choice for underground hydropower systems.

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