Water system Ductile Iron Pipe Direct Shipment from Factory ClassK7 K8 K9 Centrifugal Ductile Pipe
Brand TOPSUN
Product origin China
Delivery time 30 days
Supply capacity 10,000 tons per year
Our centrifugally cast Ductile Iron Pipes, available in direct factory shipments for classes K7, K8, and K9, are engineered for demanding applications. These high-strength pipes are the preferred choice for municipal water supply networks, industrial raw water transport, and pressurized sewage systems, ensuring reliable fluid conveyance under varying pressures. Their superior load-bearing capacity and corrosion resistance also make them ideal for subaqueous and subway line projects, guaranteeing long-term infrastructure integrity and performance.
Backed by advanced manufacturing technologies and stringent quality control, our production line boasts significant output capabilities, ensuring consistent product quality and dependable supply. We have successfully supplied large-diameter pipes for numerous major urban water infrastructure projects and international contracts, with our products being trusted by municipal utilities and construction firms worldwide. Our proven track record in these diverse applications underscores the reliability and adaptability of our ductile iron pipe systems.
Leveraging substantial production capacity and extensive raw material reserves, we maintain a strategic inventory of finished pipes to facilitate prompt direct shipments. This efficient supply chain model enables us to offer competitive pricing while accommodating both bulk international orders and urgent domestic requests, ensuring timely project execution for our clients. Our global sales network and logistical expertise guarantee that your order arrives on schedule, wherever your project is located.
Nominal Size DN | Minimum tensile strength, Rm Mpa | Minimum 0.2% proof stress, Rp0.2 Mpa | Minimum elongation after fracture,A % | Hardness HB |
80-1000 | ≥420 | ≥300 | ≥10 | ≤230 |
1100-2600 | ≥7 | |||
Note: 1. By agreement between manufacture and purchaser, the 0.2% proof stress (Rp0.2) may be measured. It shall be not less than: · 270 MPa when A≥12% for DN 40 to DN 1000 or A≥10% for DN ＞1000; · 300 MPa in other cases. 2. DN 40 to DN 1000, the minimum elongation after fracture shall be 7% for thickness classes over K12. | ||||
Nominal Size(DN) | Hydrostatic works test pressure (bar) |
80-300 | 50 |
350-600 | 40 |
700-1000 | 32 |
1200-2000 | 25 |
2200-2600 | 18 |
DN | Nominal value | Tolerance 1) | Maximum crack width and radial displacement |
80-300 | 4 | -1.5 | 0.4 |
350-600 | 5 | -2 | 0.5 |
700-1200 | 6 | -2.5 | 0.6 |
1400-2000 | 9 | -3 | 0.8 |
1）A negative tolerance only is given. Note: Pipe end may have a chamfer of maximum length 50 mm. | |||
When metallic zinc spray is applied, the mean mass of the zinc per unit area shall be not less than 130g/m2 ,
with a local minimum of 110 g/m2. The mass of the zinc according to customer’s request is also available.
The mean thickness of bitumen coating shall be not less than 70 μm and local minimum thickness shall be
not less than 50 μm. The thickness of bitumen coating according to the customer’s request is also available.
External coatings | Internal coating(linings) | Coating of the joint area |
- Metallic zinc with finishing layer, in accordance with ISO 8179-1; - Zinc rich paint with finishing layer, in accordance with ISO 8179-2; - Epoxy coating, in accordance with EN 14901; - Polyethylene sleeve, in accordance with ISO 8180; - Alloy of zinc and aluminum with or without other metals, having a minimum mass of 400 g/m2, with finishing layer; - Extruded polyethylene coating in accordance with EN 14628; - Polyurethane coating in accordance with EN 15189; - Cement mortar coating in accordance with EN 15542; - Adhesive tape; | - Portland/Blast furnace slag/Sulphate/ High Aluminum Cement Mortar, in accordance with ISO 4179; - Cement mortar lining with seal coat, in accordance with ISO 16132; - Epoxy coating, in accordance with EN 14901; - Polyurethane lining in accordance with EN 15655; | - Epoxy coating; - Polyurethane coating. |
Class K7, K8, and K9 centrifugal ductile iron pipes offer superior features for robust water systems. The pipes are manufactured using high-strength ductile iron, providing exceptional tensile strength, impact resistance, and excellent load-bearing capacity, making them suitable for deep bury and high-pressure applications. A key feature is their outstanding corrosion resistance, achieved through advanced external coatings like zinc or zinc-aluminum alloy, often supplemented with bitumen or epoxy finishes. Internally, cement mortar or polyurethane linings ensure long-term water quality protection and minimize friction losses. The restrained joint system, a critical feature, offers easy assembly and reliable, leak-free performance even under significant pressure surges and ground movement. Available for direct factory shipment, these pipes guarantee durability, longevity, and cost-effectiveness for critical infrastructure projects.
Cast Ductile Iron Pipes (Classes K7, K8, K9) are engineered for high-performance and reliability in demanding water system applications. They are the preferred choice for municipal potable water distribution and transmission mains, ensuring safe and efficient water delivery over long distances. Their superior strength and durability also make them ideal for pressurized raw and sewage water systems, industrial process water lines, and fire protection networks. The pipe's high load-bearing capacity is critical for projects with deep bury depths or installations beneath highways and railways. Available for direct shipment from our factory, we provide a reliable supply for large-scale infrastructure projects, including urban development, irrigation schemes, and plant intake/discharge lines, guaranteeing system integrity and a long service life.
Topsun specializes in the supply of Centrifugally Cast Ductile Iron Restrained Joint Socket and Spigot Pipes, manufactured in full compliance with international standards including ISO 10804, ISO 2531, EN 545, and EN 598. Our comprehensive product range covers diameters from DN80 to DN2600 and pressure classes K7 to K14, alongside high-strength classes from C20 to C100, catering to diverse pressure and load-bearing requirements. To ensure superior corrosion protection and longevity in various environments, we offer multiple coating options such as Metallic Zinc (130-200g/m²), Zn-Al Alloy 85/15, Black Bitumen, Red/Blue Epoxy, Cement Lining, and Polyurethane (PU) Coating.
Centrifugally Cast Ductile Iron Pipe is produced using high-quality ductile iron with a spherical graphite microstructure, formed through an advanced centrifugal spinning process. This manufacturing method ensures a uniform, dense pipe structure with excellent mechanical properties, including high strength, good toughness, and impact resistance. These pipes are suitable for conveying a wide range of fluid media such as water, oil, and gas, making them ideal for various demanding applications across multiple sectors including metallurgy, mining, water conservancy, petroleum, and urban public utilities.
With significant production capacity and extensive inventory, Topsun guarantees reliable direct shipment from our factory. We have successfully supplied these pipes for numerous global infrastructure projects, including municipal water networks and industrial pipeline systems. Our strong R&D focus and quality control system ensure that all products meet the highest performance and durability standards, providing clients with cost-effective and long-lasting pipeline solutions for both standard and specialized applications.
CUSTOMERS & MARKET
Q: What's your qualification in this product ?
A: We have been engaged in this industry for decades with seasoned export team. All the product is strictly conformed to the international standard ISO2531:1998,EN545-2002 and other related standard.
Q: How long is your delivery time ?
A: Generally it is 5-10 days if the goods are in stock. or it is 20-30 days if the goods are not in stock, it is according to quantity.
Q: What's your terms of payment ?
A: 30% T/T in advance , balance before shipment or against L/C . And D/P , D/A ,L/C for free options.
Q: What's your trade terms ?
A: FOB , CIF , CFR as per client's requirements.
If you have any other questions , please feel free to contact us.
