Internal Coating Pipes are steel or alloy pipes coated internally with protective layers like Fusion Bonded Epoxy (FBE) or Liquid Epoxy, designed to prevent corrosion, enhance flow efficiency, and extend service life in demanding applications. Compliant with standards like NACE SP0394 and ISO 21809, these pipes are ideal for water, oil, gas, and chemical pipelines.

The Fusion Bonded Epoxy Coating is applied as a powder to preheated pipes (180–250°C), melting to form a uniform, durable barrier. Liquid Epoxy Coating is sprayed or brushed, curing at ambient or controlled temperatures. Both methods ensure excellent adhesion and resistance to chemicals and abrasion. Available in diameters from 2” to 48” and thicknesses from 100–500 microns, these coatings suit diverse pipeline requirements.

Corrosion Protection Pipes undergo rigorous testing, including holiday detection, adhesion, and cathodic disbondment tests, ensuring compliance with industry standards. The smooth coating surface (Ra ~0.5–2.5 µm) reduces friction, improving flow efficiency and reducing pumping costs. These coatings resist temperatures up to 120°C (FBE) or 80°C (Liquid Epoxy), making them suitable for harsh environments like oilfields and chemical plants.

Compared to HDPE linings or cement mortar, Internal Coating Pipes offer superior chemical resistance and easier application for complex geometries. They require minimal maintenance, reducing downtime and operational costs. Surface preparation via abrasive blasting (to Sa 2.5) ensures optimal coating adhesion, while proper curing prevents defects like pinholes or blisters.

Internal Coating Pipes address pipeline corrosion, abrasion, and fouling, providing reliable, cost-effective, and eco-friendly solutions for industrial piping systems, ensuring longevity and performance in extreme conditions.

Composition of FBE and Liquid Epoxy Coatings
Component	FBE Coating (%)	Liquid Epoxy Coating (%)	Function
Epoxy Resin	60–80	50–70	Provides adhesion and chemical resistance
Hardener/Curing Agent	10–20	20–30	Ensures curing and durability
Fillers (Silica, Talc)	10–20	5–15	Enhances mechanical strength
Pigments/Additives	2–5	2–10	Improves UV and thermal stability

The Internal Coating Pipes utilize epoxy-based coatings for robust corrosion and chemical resistance in industrial applications.

Properties of FBE and Liquid Epoxy Coatings
Property	FBE Coating	Liquid Epoxy Coating	Test Standard
Adhesion Strength	≥30 MPa	≥20 MPa	ASTM D4541
Hardness (Shore D)	80–90	70–85	ASTM D2240
Impact Resistance	≥1.5 J	≥1.0 J	ASTM G14
Chemical Resistance	Excellent (pH 2–12)	Good (pH 3–11)	ASTM D543
Temperature Range	-30°C to 120°C	-20°C to 80°C	N/A
Surface Roughness (Ra)	0.5–2.5 µm	1.0–3.0 µm	ISO 4287

These properties ensure Internal Coating Pipes provide robust corrosion protection and flow efficiency in demanding environments.

Internal Coating Pipes with FBE or Liquid Epoxy outperform HDPE linings and cement mortar in chemical resistance and ease of application.

Comparison of Internal Coating Pipes with Other Coatings
Feature	FBE Coating	Liquid Epoxy Coating	HDPE Lining	Cement Mortar Lining
Material	Epoxy powder	Liquid epoxy	High-density polyethylene	Cement, sand
Corrosion Resistance	Excellent	Good	Superior, chemically inert	Good, high pH
Abrasion Resistance	Good	Moderate	Excellent	Moderate
Application Method	Electrostatic spray	Spray/brush	Trenchless insertion	Centrifugal/spray
Temperature Range	Up to 120°C	Up to 80°C	Up to 80°C	Up to 60°C
Lifespan	20–30 years	15–25 years	50–100 years	50–100 years

Types of Coatings

Epoxy Coating

Provides excellent corrosion resistance and is widely applied in oil and gas pipelines for long-term durability.

Polyurethane Coating

Offers good flexibility and impact resistance, making it suitable for pipelines subject to mechanical stress.

Ceramic Coating

Designed for high-temperature applications, providing exceptional thermal stability and protection.

Glass Flake Coating

Known for its superior chemical resistance, ideal for pipelines in aggressive industrial environments.

Coating Technologies

Epoxy Powder Coating

With over 30 years of proven use, epoxy powder coating offers a simple, economical, and eco-friendly anti-corrosion solution. It ensures long service life and excellent performance for oil, gas, and water pipelines.

2 & 3-Layer Coatings

Widely applied in oil & gas pipelines, product lines, and fire-fighting systems. Provides ecological safety, maintains water quality, and ensures reliability in long-term operations.

Heat-Resistant Coating

Epoxy-based heat-resistant coatings are applied inside steel pipes and dried using hot air or water above 60°C. Ideal for hot water and heating pipelines, ensuring durability under thermal stress.

Epoxy Resin Latex Cement Mortar

Combines epoxy resin latex with cement mortar, reinforced with colloidal silica. Provides excellent corrosion protection and mechanical strength for water, oil, gas, and steam pipelines.