Ductile Iron Pipe
Ductile Iron Pipe (DIP) is a high-strength, durable, and corrosion-resistant piping solution widely used in municipal water supply, wastewater systems, and industrial pipeline projects. Manufactured with a spheroidal graphite structure, ductile iron pipe offers superior tensile strength and flexibility compared with traditional cast iron, ensuring long-term reliability and safety for critical infrastructure.
Since 1955, ductile iron pipes have been the preferred choice for modern water supply and wastewater treatment systems. They offer exceptional strength, durability, and reliability for transporting raw water, drinking water, wastewater, slurry, and process chemicals.
Ductile iron pipes are designed and manufactured to the industry's most stringent standards, effectively withstanding damage during transportation and handling. Once installed, they can withstand the most demanding operational conditions, including water hammer, frozen ground, deep trenches, high groundwater levels, high-traffic areas, river crossings, pipe supports, rocky channels, and moving, expanding, and unstable soils.
As a leading China ductile iron pipe manufacturer, Midas supplies a full range of DI pipes in diameters from DN80 to DN2600, with classes K7–K12 and C25–C40, complying with EN545, EN598 and ISO2531. Our pipes are available with various internal linings and external coatings to meet potable water, sewage and industrial application requirements.
Our ductile iron pipes are manufactured and tested in accordance with internationally recognized standards to meet diverse project requirements:
ISO 2531 / EN 545 / EN 598 – Ductile iron pipes for water and wastewater
ANSI / AWWA C151 / A21.51 – Ductile iron pipe, centrifugally cast
ANSI / AWWA C104 / A21.4 – Cement-mortar lining for ductile iron pipe
ASTM and AWWA standards for joints, fittings, and accessories
Midas is a leading China ductile iron pipe manufacturers and suppliers. We provides DI pipes with diameters ranging from DN80 to DN2600, which comply with European EN598, EN545 and international ISO2531 standards, ensuring product quality and reliability, suitable for a variety of demanding application environments. Warmly welcome you to buy high quality ductile iron pipe at competitive price from our factory. Contact us for specifications.
All pipes have metallized zinc coating, pipe coating can also be customized
Available pipe wall thickness: K7, K8, K9, C40, C30, C25, etc.
Available in a variety of external coatings.
Meets all European (EN) and International (ISO) standards.
Acclaimed by contractors, utility companies and manufacturers for its superior quality.
We also provide grooved ends and custom fabrication (cutting, welding, flanging) to meet specific project designs.
To accommodate various installation conditions and pressure requirements, multiple joint systems are available:
Push-On (TYTON® Type) Joints: Fast installation with reliable sealing performance.
Restrained Joints: Suitable for high-pressure pipelines and areas with axial loads.
Mechanical Joints: Flexible and widely used in municipal water systems.
Flanged Joints: Ideal for pump stations, valves, and equipment connections.
1. High Elastic Deformation and Crack Resistance: Ductile iron structure offers excellent flexibility and crack resistance, making it highly durable under various conditions.
2. Strength Under Loads: Ductile iron pipes maintain their integrity and strength even under significant loads, ensuring long-term reliability.
3. Pressure Resistance: These pipes can withstand high pressure, making them ideal for various industrial and commercial applications.
4. Corrosion Resistance: Ductile iron is highly resistant to corrosion, extending the lifespan of the pipes and reducing maintenance costs.
5. Push-Fit Joint System: The push-fit joint system simplifies installation and ensures a secure and leak-free connection.
6. Maintenance-Free: Ductile iron pipe is exceptionally easy and safe to install by trained contractors. DIP requires no complicated laying schedules or complicated line-and-grade diagrams. It’s good for use in a wide range of conditions, and it maintains its structural integrity even when it’s subject to direct tapping in straight lines. DIP also resists damage during installation, transport and handling, and it’s virtually maintenance-free once installed.
7. Easy to Process: Ductile iron is also readily machinable, an important requirement in any pipe that must be drilled, tapped or cut.
Ductile iron pipes are trusted worldwide for a wide range of infrastructure projects, including:
Municipal potable water transmission and distribution – High‑strength, leak‑tight joints and cement mortar lining ensure safe drinking water supply.
Wastewater and sewage systems – EN598‑compliant DI pipes are widely used in gravity sewers and force mains.
Industrial water and cooling systems – Suitable for process water, cooling water and industrial effluent.
Fire protection systems – High pressure rating and robustness make DI pipes ideal for fire‑fighting networks.
Stormwater and drainage – DI pipes can handle high‑velocity stormwater and external loads from traffic and backfill.
Desalination and water treatment plants – Used for intake and outfall pipelines, internal plant piping and slurry lines.
Trenchless and rehabilitation projects – DI pipes can be used for pipe jacking, micro‑tunneling and sliplining applications.
Ask for project‑specific support
High strength and ductility – Spheroidal graphite structure provides high tensile strength (min. 420 MPa) and good ductility, allowing DI pipes to withstand high pressure and ground movement.
Corrosion resistance – With internal cement mortar lining and external coatings (zinc + bitumen, epoxy, etc.), DI pipes offer long service life in water and wastewater applications.
Ease of installation – Push‑on joints and robust pipe bodies simplify handling and speed up installation, even in challenging terrain.
Long service life – When correctly designed and installed, ductile iron pipelines can exceed 50–100 years of service life.
Low life‑cycle cost – Reduced maintenance, fewer failures and lower risk of leakage contribute to lower total cost of ownership compared with many alternative materials
Ductile iron pipe offers higher mechanical strength, better impact resistance, and longer service life, making it suitable for high-load and high-pressure applications.
Yes, ductile iron pipes are widely used for potable water, wastewater, and sewage systems when manufactured according to appropriate standards.
Joint selection depends on pressure, installation environment, and project design. Push-on joints are common for standard pipelines, while restrained or flanged joints are used for higher pressure or special conditions.
With advanced manufacturing technology and strict quality control, we supply a full range of ductile iron pipes from DN80 to DN2600. Our products comply with international standards and are widely exported for municipal and industrial projects worldwide. We provide not only reliable products but also technical support and project-based solutions to help ensure long-term pipeline performance.
Full product range: DI pipes from DN80 to DN2600, classes K7–K12 and C25–C40, complying with EN545, EN598 and ISO2531.
Advanced manufacturing: Centrifugal casting, automated coating and lining lines, and in‑house laboratory ensure consistent quality.
Strict quality control: Every pipe is hydrostatically tested and inspected for dimensions, coating thickness and mechanical properties.
Custom solutions: We can provide custom pipe lengths, special coatings, fabricated spools and prefabricated pipe supports.
Global project experience: Midas DI pipes have been supplied to water and wastewater projects in Asia, the Middle East, Africa and Europe.
Technical support: Our engineering team can assist with material selection, hydraulic design and joint detailing.Contact us today to learn about our pipeline and place your order!
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