Ductile Iron Pipe Erternal Paint with Epoxy

Colors: Red, Blue, Green or as request
1. The standard of pipe: ISO 2531, EN545 , EN598.
2. Pipe class: K9, C40, C30, C25, etc.
3. Pipe joint: push-on joint(Tyton joint), , self-restrained joint
4. Effective length: in general, the pipe length is 6m for bulk shipment and 5.7m for container shipment.
5. Internal lining: cement mortar lining as per ISO4179
6. Zinc coating: at least 130g/m2 as per ISO 8179
7. Bitumen painting: at least 70um as per ISO 8179
8. Gaskets are NBR , SBR or EPDM rubber ring as per ISO4633

9. DN 80 - 2,600 mm
10. High strength, lighter than gray iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life time
11. Checked by automatic inspection equipment
12. Mechanical properties
a. Tensile strength: ≥420MPa
b. Yield strength: ≥300Mpa
c. Hardness: ≤230HB
d. Elongation%: DN80 - 1000 ≥10 DN1200 - 2200 ≥7
13. Process and testing:
a. Induction furnace and treated metal (Chemical analysis of raw material, spheroidizing & Nodularity)
b. Casting (Visual check and weight check)
c. Heat treatment (Micro structure)
d. Hydrostatic test (Pressure test)

e. Dimensional checks (Checking pipe length and joint, OD, wall thickness, appearance)

f. Zinc spraying (Thickness testing)
g. Lining and coating (100% visual check, thickness testing randomly)
h. Marking and packing (100% visual check)

14. The pipe coating can be customized, such as, zinc-aluminum alloy, PU, etc.

Packing: bundled with steel belts or in bulk
Shipment: in bulk or container

Epoxy Coated Ductile Iron Pipe is widely recognized as one of the most reliable piping solutions for water supply, sewage systems, industrial pipelines, and municipal infrastructure projects. By combining the high mechanical strength of ductile iron with advanced epoxy coating technology, these pipes deliver exceptional durability, corrosion resistance, and long-term performance even in aggressive environments.

As global infrastructure standards continue to rise, epoxy coated ductile iron pipes have become a preferred choice for engineers, contractors, and utility companies seeking safe, cost-effective, and low-maintenance pipeline systems.

What Is an Epoxy Coated Ductile Iron Pipe?

An epoxy coated ductile iron pipe is manufactured from spheroidal graphite cast iron (ductile iron) and protected by a high-performance epoxy resin coating applied to the internal surface, external surface, or both.

The epoxy coating forms a smooth, chemically resistant barrier that:

• Prevents corrosion caused by water, soil, chemicals, and microorganisms

• Enhances hydraulic efficiency by reducing friction losses

• Improves hygiene and water quality for potable water systems

This combination makes epoxy coated ductile iron pipes suitable for both drinking water applications and harsh industrial environments.

Key Advantages of Epoxy Coated Ductile Iron Pipes

Excellent Corrosion Resistance

Epoxy coatings effectively isolate the iron substrate from moisture, oxygen, and corrosive agents. This significantly extends the service life of the pipe, especially in:

• Acidic or alkaline soils

• Coastal or high-salinity environments

• Wastewater and industrial effluent systems

High Mechanical Strength and Pressure Capacity

Ductile iron pipes offer outstanding tensile strength, impact resistance, and pressure-bearing capacity compared to traditional cast iron or plastic pipes. They can withstand:

• High internal pressure

• External loads from traffic or soil cover

• Ground movement and vibration

Smooth Internal Surface and Improved Flow Efficiency

The epoxy lining provides a smooth, non-porous surface that:

• Reduces head loss

• Minimizes scaling and sediment buildup

• Maintains consistent flow rates over long periods

This results in improved system efficiency and lower pumping energy costs.

Long Service Life and Low Maintenance

With proper installation and coating quality control, epoxy coated ductile iron pipes can achieve a service life of 50 years or more, reducing replacement frequency and long-term operating costs.

Compliance with International Standards

Epoxy coated ductile iron pipes can be manufactured to meet major global standards, including:

• ISO 2531

• EN 545 / EN 598

• AWWA C151 / C104

• BS and DIN standards

This ensures compatibility with international infrastructure projects and tender requirements.

Common Applications

Epoxy coated ductile iron pipes are used across a wide range of industries and projects, including:

• Potable water transmission and distribution systems

• Municipal sewage and wastewater pipelines

• Industrial water supply and process pipelines

• Desalination plants and coastal infrastructure

• Fire protection and firefighting pipeline networks

• Power plants, chemical plants, and mining projects

Their versatility makes them suitable for both underground and above-ground installations.

Epoxy Coating Types and Options

Depending on project requirements, different epoxy coating solutions can be applied:

• Internal Epoxy Coating
  Designed for potable water and wastewater pipelines to ensure hygiene and smooth flow.

• External Epoxy Coating
  Protects against soil corrosion, moisture, and environmental exposure.

• Fusion Bonded Epoxy (FBE) Coating
  Offers superior adhesion, uniform thickness, and enhanced resistance to chemicals and abrasion.

Coating thickness, color, and performance can be customized according to customer specifications and operating conditions.

Installation and Jointing Methods

Epoxy coated ductile iron pipes support multiple joint types to simplify installation and ensure system reliability:

• Push-on joints

• Mechanical joints

• Flanged joints

• Restrained joints

These jointing systems allow flexibility in complex terrains while maintaining leak-proof performance.

Why Choose Epoxy Coated Ductile Iron Pipe for Your Project?

Compared with PVC, HDPE, or steel pipes, epoxy coated ductile iron pipes provide a balanced solution with:

• Higher strength than plastic pipes

• Better corrosion protection than uncoated steel

• Longer lifespan and lower total cost of ownership

For critical infrastructure projects where safety, durability, and compliance are essential, epoxy coated ductile iron pipes remain a proven and trusted choice.

Conclusion

Epoxy Coated Ductile Iron Pipe represents a high-performance piping solution designed to meet the demands of modern water, sewage, and industrial systems. With superior corrosion resistance, mechanical strength, and long-term reliability, it is an ideal investment for municipalities, contractors, and industrial operators seeking sustainable and cost-effective pipeline infrastructure.