ISO2531 En545 EN598 Class K9 Black Bitumen Paint Coated Ductile Cast Iron Pipe for Water Supply
Brand TOPSUN
Product origin China
Delivery time 30 days
Supply capacity 10,000 tons per year
Widely applied in municipal water supply networks, industrial water systems, and firefighting pipelines, this ductile iron pipe ensures reliable performance under high-pressure conditions. With projects completed across Europe, Asia, and the Middle East, it has been trusted by public utilities and construction firms for its corrosion resistance and longevity. The black bitumen coating provides enhanced protection against soil aggression and moisture, making it ideal for underground installations.
Manufactured using advanced centrifugal casting technology and automated coating processes, the pipe complies with ISO2531, EN545, and EN598 standards. Our facilities leverage rigorous quality control systems, including hydrostatic testing and layer thickness inspections, to guarantee dimensional accuracy and durability. Continuous R&D focuses on improving material composition and eco-friendly coatings to meet evolving global demands.
Supported by an annual production capacity exceeding 100,000 tons, we maintain ample inventory for prompt delivery. Our products have served major infrastructure projects, such as urban water expansion initiatives and cross-border supply schemes, with over 500 km of pipes deployed annually. Competitive pricing and customizable lengths further strengthen our supply chain efficiency for international clients.

Type | T-type Joint Pipe (Push-on) | |||
Standard | ISO2531, EN545, EN598, etc | |||
DN | DN80mm~DN2600mm | |||
Material | Ductile Cast Iron GGG50 | |||
Pressure | PN10, PN16, PN25,PN40 | |||
Wall Thickness | K9, K8, C25, C30, C40 | |||
Length | 6m, cut to 5.7m | |||
Application | Water supply project, drainage, irrigation, water pipeline system. | |||
Internal Coating | a). Portland cement mortar lining | |||
b). Sulphate Resistant cement mortar lining | ||||
c). High-Aluminum cement mortar lining | ||||
d). Fusion bonded epoxy coating | ||||
e). Liquid epoxy painting | ||||
f). Black bitumen painting | ||||
External Coating | a). zinc+bitumen(70microns) painting | |||
b). Fusion bonded epoxy coating | ||||
c). Zinc-aluminum alloy +liquid epoxy painting | ||||
Package | Bundles, in bulk | |||
Note | The coating can also be accordance with customers' requirements. | |||
This Class K9 Ductile Cast Iron Pipe, compliant with ISO 2531, EN 545, and EN 598 standards, is engineered for superior performance in water supply applications. Its primary strength lies in the exceptional mechanical properties of ductile iron, which offers high tensile strength, impact resistance, and excellent ductility, making it resilient to external loads, ground movements, and pressure surges.
The pipe is protected by a robust black bitumen coating, providing effective and durable external corrosion resistance against a wide range of soil conditions. This ensures a long service life and reduces maintenance needs. The high-pressure rating of Class K9 guarantees reliable operation within demanding water transmission systems.
Furthermore, these pipes feature excellent internal flow characteristics, minimizing pumping costs over their lifespan. Their inherent strength allows for deeper burial depths and safer installation under roads and railways. The combination of a standardized socket and spigot design (often with a push-fit joint sealed by a rubber gasket) ensures quick, leak-tight, and reliable assembly. This makes the pipe a versatile, durable, and cost-effective choice for modern water infrastructure projects.
Our Class K9 Bitumen Coated Ductile Iron Pipes are the preferred choice for a wide range of water transmission and distribution projects. They are extensively used in municipal potable water supply networks, ensuring the safe and reliable delivery of water from treatment plants to urban and residential areas. Their high pressure rating and durability also make them ideal for industrial water systems, firefighting pipelines, and as crucial conduits in irrigation and agricultural water schemes.
The pipe's superior external corrosion resistance, provided by the thick black bitumen layer, is specifically engineered for direct burial in diverse and aggressive soil conditions. This makes it exceptionally suitable for main water transmission lines, river crossings, and projects requiring long-term, maintenance-free operation. The secure push-fit joint system allows for rapid installation in congested urban trenches or more remote locations, reducing overall project time and cost while guaranteeing a leak-proof system for decades.

This product is a high-grade Ductile Cast Iron Pipe specifically engineered for pressurized water supply systems. It is manufactured in full compliance with the stringent international standards ISO 2531, EN 545, and EN 598, guaranteeing consistent quality and performance. Designated with a pressure class of K9, the pipe offers substantial mechanical strength and high load-bearing capacity, making it capable of withstanding severe internal pressures and external soil loads.
A key feature of this pipe is its specialized coating system. The exterior is protected by a continuous, high-quality black bitumen layer. This coating provides superior resistance against corrosion and electrochemical attacks, ensuring long-term durability when buried in a wide range of soil conditions. Internally, a smooth cement-mortar lining is applied, which effectively prevents scaling and incrustation, maintains high flow capacity over time, and preserves water quality.
The pipe is designed for efficiency and reliability throughout its lifecycle. It is equipped with a user-friendly push-fit joint system, typically incorporating a robust EPDM rubber gasket. This design ensures a quick, simple, and leak-tight assembly, significantly reducing installation time and labor costs. The combination of its durable ductile iron substrate, effective external bitumen protection, and smooth internal lining makes this pipe an exceptionally reliable and economical solution for modern water infrastructure projects.
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.








