High-Performance Epoxy Coated Steel Pipe (FBE & Liquid Epoxy)
Our Epoxy Coated Steel Pipes are engineered for maximum corrosion protection in demanding environments. Utilizing advanced Fusion Bonded Epoxy (FBE) and Liquid Epoxy technologies, these pipes provide a robust barrier against chemical attack, moisture, and soil stress. Ideal for oil, gas, water, and wastewater transmission.
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Coating Types: Fusion Bonded Epoxy (FBE), Dual-layer FBE, and Liquid Epoxy.
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Size Range: 1/2″ to 100″ (DN15 – DN2500).
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Standards: AWWA C210, DIN 30670, CAN/CSA Z245.20, AS 3862, Shell DEP 31.40.30.31.
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Key Features: Superior adhesion, high chemical resistance, excellent flexibility, and long-term durability.
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Applications: Potable water lines, natural gas pipelines, firefighting systems, and chemical processing.
Description
1. Product Overview
Epoxy Coated Steel Pipe is widely used for the transportation of oil, gas, water, and wastewater. The internal and external epoxy coating provides an exceptional shield against corrosion and abrasive substances. We specialize in two primary types of epoxy coatings:
- Fusion Bonded Epoxy (FBE): A high-performance anti-corrosion powder coating that is heat-cured to form a robust chemical bond with the steel surface.
- Liquid Epoxy: A multi-component coating system typically used for internal linings or complex fittings where powder coating is less applicable.
2. Fusion Bonded Epoxy (FBE) Technology
FBE is a thermosetting epoxy resin applied to the pipe at temperatures typically ranging from 180°C to 250°C. Once the powder hits the hot pipe, it melts and flows onto the surface, chemically cross-linking to form a hard, monolithic layer.
Key Advantages:
- Excellent Adhesion: Forms a permanent bond that resists cathodic disbondment.
- Chemical Resistance: Highly resistant to acids, alkalis, and hydrocarbons.
- Flexibility: Can withstand bending and soil stress without cracking or peeling.
- Thermal Stability: Suitable for a wide range of operating temperatures.
3. Executive Standards & Steel Grades
| Coating Standard | Base Pipe Standards |
|---|---|
| AWWA C210, AWWA C213 | API 5L (Gr. B, X42, X46, X52, X56, X60, X65, X70, X80) |
| DIN 30670, DIN 30671 | ASTM A53 (Grade A, B) |
| CAN/CSA Z245.20, Z245.21 | ASTM A106 (Grade B, C) |
| AS 3862 | ASTM A333 (Grade 1, 6) |
| Shell DEP 31.40.30.31 | EN 10219, EN 10210 |
4. Technical Specifications
| Parameter | Specification Range |
|---|---|
| Outer Diameter (OD) | 1/2″ – 100″ (21.3mm – 2540mm) |
| Wall Thickness (WT) | 2.0mm – 60mm |
| Coating Thickness | Standard: 300 – 500 μm | Heavy Duty: Up to 1000 μm |
| Operating Temperature | -30°C to +110°C (depending on epoxy type) |
| Adhesion Strength | ≥ 14 MPa |
5. Manufacturing Process (FBE)
Our FBE coating line uses a fully automated process to ensure consistent quality and thickness:
- Pre-heating: Pipe is heated to remove moisture.
- Surface Cleaning: Shot blasting to reach Sa 2.5 cleanliness and provide a rough anchor profile.
- Heating: Medium-frequency induction heating to the required application temperature.
- Powder Application: Electrostatic spray application of epoxy powder.
- Curing: The epoxy cures on the hot surface using residual heat.
- Cooling: Water quenching to bring the pipe to handling temperature.
- Final Inspection: Holiday detection, thickness measurement, and adhesion tests.
Technical Workflow of the Epoxy Coating Application
6. Applications
Epoxy coated pipes are versatile and reliable for various critical infrastructure sectors:
- Water Supply: Internal lining for potable water systems to prevent rust and maintain water quality.
- Oil & Gas: External coating for burial to resist soil chemicals and moisture.
- Industrial Lines: Transport of chemical fluids, wastewater, and saline water.
- Fire Protection: Buried fire hydrant and sprinkler main lines.