DUCTILE IRON PIPE DN350 K8/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:Disadvantages of ductile iron pipes: The strength of nodular cast iron is comparable to that of cast steel. Ductile iron has higher yield strength, the lowest yield strength is 40K, while the yield strength of cast steel is only 36k.

Q:Are ductile iron pipes resistant to chemicals or solvents?: Ductile iron pipes possess a general resistance to a wide variety of chemicals and solvents. This resistance can be attributed to their composition, which consists of a high percentage of iron and carbon, as well as small amounts of other alloying elements like silicon, manganese, and magnesium. These alloying elements contribute to the overall strength and durability of the pipes, thereby making them highly resistant to corrosion and chemical attacks. However, it is important to acknowledge that the resistance of ductile iron pipes to chemicals and solvents may vary depending on the specific substance and its concentration. Certain aggressive chemicals or solvents, especially those with high levels of acidity or alkalinity, may gradually corrode or degrade the material of the pipes over time. In such instances, it is advisable to consult the pipe manufacturer or a professional engineer to ensure the compatibility of the pipes with the specific chemicals or solvents being used. Furthermore, the proper installation and maintenance practices are critical factors in preserving the chemical resistance of ductile iron pipes. Regular inspections, cleanings, and the application of protective coatings can assist in extending the lifespan and performance of the pipes when exposed to various chemicals or solvents.

Q:How are ductile iron pipes protected against external impact or loading?: Ductile iron pipes undergo various methods and measures to safeguard them against external impact or loading, guaranteeing their durability and integrity. Several common approaches are employed to protect ductile iron pipes, including: 1. Adequate Thickness and Strength: Ductile iron pipes are designed with ample wall thickness and high strength to withstand external loads and impacts. This design feature ensures that the pipes can endure heavy loads without deforming or cracking. 2. Implementation of Coatings: Ductile iron pipes are typically coated with protective layers to create an additional barrier against external impact. These coatings may comprise cement mortar lining, polyethylene encasement, or epoxy coatings. They not only grant impact resistance but also safeguard against corrosion. 3. Utilization of Proper Bedding and Backfilling Techniques: Proper techniques for bedding and backfilling are crucial in protecting ductile iron pipes from external loads. The correct placement of pipes within suitable materials, such as compacted granular bedding and backfill, helps distribute external loads evenly and minimizes the risk of pipe damage. 4. Consideration of Trench Design: The design of the trench in which ductile iron pipes are installed plays a vital role in safeguarding them against external impact. The dimensions of the trench, slope stability, and proper compaction of the backfill are all taken into account to reduce the likelihood of damage caused by external loads. 5. Implementation of Effective Pipe Layout and Support: Appropriate pipe layout and support are essential for protecting ductile iron pipes from external impact. Sufficient support mechanisms, including thrust blocks, pipe anchors, and pipe restraints, are utilized to absorb and distribute external loads, preventing any damage to the pipes. 6. Installation of Protective Structures: In areas where the risk of external impact is higher, additional protective structures are installed to safeguard ductile iron pipes. These structures may include concrete encasements, bollards, or reinforced concrete slabs, which act as physical barriers against potential impacts. In conclusion, a combination of factors, including 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, guaranteeing efficient performance in various applications.

Q:Can ductile iron pipe be used for water treatment plant sludge handling?: Yes, ductile iron pipe can be used for water treatment plant sludge handling. Ductile iron pipe is known for its strength and durability, making it suitable for handling various types of fluids, including sludge. It can withstand the corrosive nature of sludge and is resistant to abrasion, which is important in a sludge handling system. Additionally, ductile iron pipe has a smooth interior surface, which helps to prevent clogs and allows for efficient flow of the sludge. Overall, ductile iron pipe is a reliable choice for water treatment plant sludge handling.

Q:Can ductile iron pipes be used for both water and wastewater applications?: Ductile iron pipes are versatile and can be utilized in both water and wastewater settings. Their durability, strength, and corrosion resistance make them appropriate for various purposes such as water distribution, sewage systems, and wastewater treatment plants. These pipes are specifically engineered to endure high pressure and effectively manage the flow of both water and wastewater. Furthermore, ductile iron pipes possess a lengthy lifespan, minimizing the necessity for frequent replacements and maintenance. This attribute renders them a cost-effective alternative for both water and wastewater applications.

Q:Classification of cast iron pipes: Drainage cast iron pipe:Pipes and fittings for plain cast iron bearing. Flexible anti-seismic interface cast iron pipe, this kind of cast iron pipe is sealed by rubber ring and bolt fastened. It has good flexibility and flexibility under water pressure. The utility model can adapt to larger axial displacement and lateral deflection, and is suitable for indoor drainage pipes of high-rise buildings, and is particularly suitable for earthquake zones. From the interface form, can be divided into: W flexible cast iron drain pipe, B flexible cast iron drain pipe, A flexible cast iron drain pipe.

Q:What are the common causes of failure in ductile iron pipes?: The common causes of failure in ductile iron pipes include corrosion, external loading, ground movement, manufacturing defects, and improper installation or maintenance.

Q:How are ductile iron pipes protected against stray current corrosion?: Various preventive measures and protective coatings are employed to safeguard ductile iron pipes from stray current corrosion. Stray current corrosion arises when an electric current flows through the pipe, causing accelerated corrosion and potential harm. To prevent this, the following measures are generally utilized: 1. Electrical isolation: Ductile iron pipes are insulated from other metallic structures by means of insulating materials like rubber gaskets or non-conductive coatings. This insulation obstructs the passage of stray current through the pipe, thereby minimizing the risk of corrosion. 2. Cathodic protection: Cathodic protection is a widely employed technique to shield ductile iron pipes from stray current corrosion. It involves installing sacrificial anodes or impressed current systems near the pipe. These anodes or systems emit a controlled electric current that counters the stray current and guarantees the cathodic protection of the iron pipe. 3. Coatings: Ductile iron pipes are typically coated with protective layers to enhance their resistance against corrosion. A common coating is fusion-bonded epoxy (FBE), which offers a high level of protection against stray current corrosion. FBE coatings act as a barrier, preventing electrical contact between the pipe and the surrounding environment. 4. Monitoring and maintenance: Regular monitoring and maintenance are essential for ensuring the ongoing protection of ductile iron pipes against stray current corrosion. This entails inspecting the protective coatings for any damage or deterioration and promptly repairing or replacing them as required. Additionally, monitoring systems can be installed to detect and measure stray currents, allowing for timely intervention if necessary. By implementing these protection measures, ductile iron pipes can effectively ward off stray current corrosion, thereby prolonging their lifespan and ensuring the integrity of the pipeline infrastructure.

Q:Can ductile iron pipes be used for mining applications?: Mining applications can indeed utilize ductile iron pipes. These pipes possess exceptional mechanical properties, including high tensile strength, impact resistance, and durability. As a result, they are well-suited for a range of challenging environments, including mining operations. The pipes are capable of withstanding substantial loads and pressures, making them ideal for the transportation of water, slurry, and other fluids utilized in mining processes. Moreover, ductile iron pipes have a smooth internal surface that minimizes friction and promotes the efficient flow of materials. Consequently, they find extensive use in tasks such as dewatering, tailings disposal, and the transport of corrosive or abrasive substances within the mining industry. Overall, due to their strength, durability, and suitability for demanding conditions, ductile iron pipes offer a dependable and cost-effective choice for mining applications.

Q:Can ductile iron pipes be used for underground river crossings?: Yes, ductile iron pipes can be used for underground river crossings. Ductile iron pipes have excellent strength and durability, making them suitable for various applications, including underground river crossings. They have high tensile strength and are resistant to corrosion and external loads, making them an ideal choice for such installations.

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