DUCTILE IRON PIPES AND PIPE FITTINGS k8 CLASS DN700

DUCTILE IRON PIPES AND PIPE FITTINGS k8 CLASS DN700

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 25 pc

Supply Capability:: 30000 pc/month

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Duct Iron Pipe DI Pipe ISO 2531 DN 700-1000mm

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: Are ductile iron pipes suitable for installation in areas with high groundwater salinity?: Areas with high groundwater salinity are generally suitable for the installation of ductile iron pipes. Ductile iron is renowned for its resistance to corrosion, making it a favored choice for various applications, such as water and wastewater systems. High groundwater salinity refers to the increased presence of dissolved salts in the water. Although this can potentially cause corrosion in certain materials, ductile iron pipes are specifically engineered to withstand such conditions. These pipes are equipped with a protective lining, usually composed of cement mortar or polyurethane, which acts as a barrier between the pipe and its surroundings, including highly saline water. The lining serves to prevent any corrosive effects of the high groundwater salinity on the iron pipe, ensuring its long-lasting durability and reliability. Furthermore, ductile iron pipes possess a high tensile strength, enabling them to endure external loads and pressure, even in demanding environments. It is important to acknowledge that the suitability of ductile iron pipes for areas with high groundwater salinity can also be influenced by factors such as the specific levels of salinity, the presence of other corrosive agents, and the overall design and installation practices. Therefore, it is advisable to consult experts or engineers who are familiar with the local conditions in order to determine the most appropriate materials and precautions for specific installation projects.

Q: How are ductile iron pipes restrained against axial thrust forces?: Ductile iron pipes are restrained against axial thrust forces through a combination of mechanical restraints and soil resistance. One common method of restraining axial thrust forces is by using thrust blocks. Thrust blocks are concrete structures that are built at bends, tees, and other locations where changes in direction occur in the pipeline. These blocks are designed to resist the axial forces and prevent the pipes from shifting or moving due to the pressure exerted by the flowing fluid. Additionally, mechanical restraints such as pipe restraints, thrust collars, and anchor blocks are used to provide further support and prevent axial movement. Pipe restraints are devices that are installed around the pipe and connected to adjacent structures, such as walls or concrete collars, to prevent movement. Thrust collars are also used to absorb and distribute the thrust forces generated by the flowing fluid. These collars are typically made of ductile iron or steel and are secured around the pipe to resist axial movement. Furthermore, soil resistance plays a significant role in restraining axial thrust forces. The weight of the soil surrounding the pipe creates frictional resistance, which helps counteract the axial forces. Proper trench backfilling, compaction, and adequate embedment of the pipe in the soil are essential to ensure effective soil resistance. In summary, ductile iron pipes are restrained against axial thrust forces through a combination of mechanical restraints such as thrust blocks, pipe restraints, and thrust collars, as well as soil resistance provided by proper trench backfilling and compaction. This comprehensive approach ensures that the pipes remain securely in place and can withstand the axial forces generated by the fluid flowing through them.

Q: How are ductile iron pipes protected against abrasion or wear?: Ductile iron pipes are protected against abrasion or wear through various methods and protective coatings. One of the most common methods is the application of cement mortar lining on the inner surface of the pipe. The cement mortar creates a smooth and hard layer that resists the effects of abrasion and wear caused by the flowing water or other materials passing through the pipe. Additionally, ductile iron pipes can be externally protected by applying a bituminous or epoxy coating. These coatings provide a barrier against external factors such as soil or chemicals that may cause wear or corrosion. The coating acts as a protective layer, preventing direct contact between the iron pipe and the surrounding environment. Moreover, for areas with severe abrasion or wear conditions, special linings or coatings can be applied. Polyethylene encasement or polyurethane lining can be used to provide enhanced protection against abrasion, particularly in areas where the pipe is exposed to high levels of turbulence or abrasive materials. In some cases, ductile iron pipes can also be reinforced with additional materials such as fiberglass or steel wire to increase their resistance to abrasion or wear. These reinforcements provide an extra layer of protection, strengthening the pipe and reducing the likelihood of damage. Overall, ductile iron pipes are designed with a combination of protective measures to ensure their durability and resistance to abrasion or wear. These measures include cement mortar linings, protective coatings, special linings or coatings for severe conditions, and reinforcements. These protective methods help extend the lifespan of the pipes and maintain their functionality even in harsh environments.

Q: How are ductile iron pipes protected against internal corrosion caused by chemicals?: To safeguard against internal corrosion caused by chemicals, ductile iron pipes implement various protective measures. Primarily, these pipes are equipped with either a cement mortar lining or an epoxy coating, creating a barrier between the water or sewage's chemical substances and the iron material. This barrier effectively prevents direct contact, thereby averting corrosion. Additionally, a corrosion-resistant polymer or bituminous coating is frequently applied to the pipes' exterior. This supplementary layer of protection shields the pipes from potential chemical exposure originating externally. Moreover, cathodic protection is a commonly employed technique to counter internal corrosion. Sacrificial anodes, typically composed of zinc or magnesium, are affixed to the pipes. Over time, these anodes undergo corrosion instead of the iron, sacrificing themselves to safeguard the pipes against chemical-induced corrosion. Furthermore, regular maintenance and monitoring play a crucial role in the prevention and rectification of corrosion issues. This entails routine inspections, cleaning, and prompt repair of any corroded or damaged areas. Overall, the integration of lining, external coating, cathodic protection, and maintenance practices ensures the comprehensive protection of ductile iron pipes against internal corrosion caused by chemicals. This prolongs their lifespan and guarantees the integrity of the pipeline system.

Q: What is the expected bedding and backfill requirements for ductile iron pipes?: The expected bedding and backfill requirements for ductile iron pipes are vital for ensuring the longevity and proper functioning of the pipe system. Ductile iron pipes are known for their durability and strength, but they still require careful installation to prevent any potential damage or compromised performance. The bedding requirements for ductile iron pipes involve providing a stable and uniform support system to distribute the loads and stresses from the surrounding soil. The pipe should be surrounded by a bedding material that is free from rocks, debris, or any sharp objects that could potentially cause damage. The bedding material should also have sufficient compaction to prevent settlement or shifting that could lead to misalignment or pipe failure. Typically, the bedding material used for ductile iron pipes is a granular material, such as sand or fine aggregate, with a thickness of at least 6 inches. This material should be placed beneath and around the pipe in a uniform manner to provide a continuous support system. Additionally, the bedding material should be compacted to at least 90% of the maximum dry density to ensure proper stability and load distribution. Backfill requirements for ductile iron pipes involve the material used to fill the remaining space around the pipe after the bedding has been installed. The backfill material should also be free from rocks, debris, or sharp objects that could potentially damage the pipe. It should provide support and protection to the pipe while allowing for proper compaction and settling. The backfill material for ductile iron pipes is typically a granular material, such as sand or fine aggregate, with a maximum particle size of 1 inch. The backfill material should be placed and compacted in layers, ensuring that the compaction is done uniformly and evenly around the pipe. The compaction should be sufficient to prevent settlement or shifting of the backfill material, which could lead to pipe damage or misalignment. In summary, the expected bedding and backfill requirements for ductile iron pipes involve using a granular material that is free from rocks, debris, or sharp objects. The material should be placed and compacted in a uniform manner to provide stable support and protection to the pipe. Adhering to these requirements will help ensure the proper functioning and longevity of ductile iron pipe systems.

Q: What does ductile iron pipe "K" mean?: 1 、 pipe fittings are K type, T type, etc.;2 wall thickness registration symbol. For example, according to the pipe quality standards GB/T13295-K9, which is the wall thickness ofK=9* (DN/1000+0.5)

Q: What are the different sizes of ductile iron pipes available?: The sizes of ductile iron pipes available vary depending on the specific needs and requirements of a project. Common sizes range from 4 inches to 64 inches in diameter, with larger sizes also available for specialized applications.

Q: Can ductile iron pipe be used for oil and gas transmission pipelines?: Yes, ductile iron pipe can be used for oil and gas transmission pipelines. It offers excellent strength, durability, and corrosion resistance, making it suitable for the transportation of various fluids, including oil and gas. However, other factors such as specific project requirements, operating conditions, and regulatory standards should also be considered before making a final decision.

Q: What is the minimum operating temperature for ductile iron pipes?: The minimum operating temperature for ductile iron pipes is typically around -20 degrees Celsius (-4 degrees Fahrenheit).

Q: How much is the installation cost of the ductile iron tube?: Ductile iron pipes mainly 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..

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