Triple-Layer 3LPE Steel Pipes
for Long-Term Corrosion Protection
Engineered with a three-layer polyethylene (3LPE) system—fusion bonded epoxy, copolymer adhesive, and extruded HDPE—these pipes deliver outstanding corrosion resistance and mechanical durability. The inner FBE layer ensures superior adhesion and cathodic protection; the adhesive layer provides strong inter-bonding; and the outer HDPE shield resists impact, moisture, and soil stress. Designed for buried or subsea pipelines, the 3LPE system extends service life to over 50 years with minimal maintenance, ideal for oil & gas, water, and industrial transmission projects.
3LPE Steel Pipe uses a three-layer coating: fusion-bonded epoxy (FBE), adhesive polymer, and high-density polyethylene (HDPE) for full corrosion defense.
Excellent adhesion and mechanical strength—resists disbondment, soil stress, and impact in harsh buried conditions.
Proven lifetime ≥ 50 years with near-zero maintenance; suitable for oil, gas, water, and chemical service lines.
Compatible with API 5L / ASTM / EN / GB standards and available with beveled or plain ends as required.
3LPE STEEL PIPE — High-Performance Corrosion Protection
- Three-layer polyethylene coating system provides excellent resistance to corrosion, abrasion, and impact damage during operation and handling.
- High adhesion and uniform coating thickness ensure reliable long-term performance under buried and subsea environments.
- Manufactured with precision extrusion and quality control for consistent layer bonding and superior surface coverage.
- Widely used in oil & gas pipelines, water transmission systems, and industrial utility networks requiring long service life.
Description
3LPE (Three-Layer Polyethylene) steel pipe provides a high-performance external protection system for buried and submarine pipelines. The coating combines fusion-bonded epoxy (FBE), adhesive polymer, and high-density polyethylene (HDPE) into a tough, uniform layer that resists corrosion, impact, and moisture penetration in aggressive environments such as saline soils and marine conditions.
With a service life of over 50 years, 3LPE steel pipes are widely used in oil & gas transmission, water distribution, and industrial pipeline networks. Each pipe is processed under strict surface preparation and coating control, tested according to ISO 21809-1, DIN 30670, and CSA Z245.21 to ensure long-term adhesion, mechanical strength, and coating consistency.
- Three-layer bonded coating ensures superior corrosion protection and mechanical durability.
- Excellent adhesion under soil stress and temperature cycling for buried and subsea pipelines.
- Applicable to oil, gas, water, and chemical service lines requiring long-term reliability.
- Tested and certified according to ISO 21809-1, DIN 30670, and CSA Z245.21 standards.
| Product Name | 3LPE Steel Pipe · Triple-Layer PE Pipe · 3LPE Anti-Corrosion Pipe |
|---|---|
| Outer Diameter | 60 mm – 3000 mm |
| Wall Thickness | 4.5 mm – 50 mm |
| Length | 6 m / 12 m / 18 m (customizable) |
| Ends | Plain ends · Bevelled ends (30°±5°) · Flanged |
| Surface Treatment | FBE · 3LPE · 3LPP — or as per project requirement |
| Standard | Steel Grade |
|---|---|
| API SPEC 5L | Gr.B, X42, X46, X52, X56, X60, X65, X70, X80 (PSL1 / PSL2) |
| ASTM A53 / A106 / A252 | Gr.A, Gr.B, Gr.C |
| EN 10217 / EN 10219 | S235, S275, S355 · L245, L290, L360, L415, L450, L485 |
| GB/T 9711 | L245, L290, L360, L415, L450, L485 |
Specifications Sheet
Production Process
The 3LPE coating process includes surface preparation, FBE primer application, adhesive bonding, and HDPE extrusion—ensuring uniform thickness, strong adhesion, and long-term corrosion protection.
Main Applications
3LPE coated steel pipes are designed for long-term corrosion protection in demanding onshore and offshore pipeline projects. Their triple-layer coating system provides outstanding durability, chemical resistance, and insulation performance across a wide range of operating environments.
Oil & Gas Pipelines
Used in crude oil, natural gas, and fuel transmission lines where external corrosion protection and coating adhesion are critical for pipeline integrity.
Water Transmission
Applied in municipal water supply, desalination, and irrigation networks requiring safe and long-lasting external protection against soil and moisture.
Chemical & Industrial Systems
Ideal for chemical plants, cooling water systems, and industrial fluid pipelines exposed to corrosive media or aggressive soils.
Offshore & Subsea Pipelines
Used for subsea lines and offshore platforms where resistance to saline, high-pressure, and temperature variation is essential.
Infrastructure Projects
Suitable for buried or above-ground pipeline systems in energy, utility, and construction sectors requiring extended service life.
Advantages
- Long-Term Protection: Extends pipeline lifespan beyond 50 years through superior corrosion and impact resistance.
- Excellent Adhesion: Fusion-bonded epoxy and adhesive layers ensure strong bonding with steel surface under thermal cycling.
- Mechanical Strength: HDPE topcoat provides high impact, abrasion, and moisture resistance in buried or marine environments.
- Standard Compliance: Fully meets ISO 21809-1, DIN 30670, and CSA Z245.21 requirements for coating performance and testing.
- Customizable Coating: Thickness, color, and marking can be tailored to meet project-specific technical standards.
Packing & Transportation
3LPE coated pipes are carefully handled and packaged to prevent coating damage during loading, transport, and unloading. Protective end caps, soft spacers, and wrapping films are used to maintain surface integrity and avoid abrasion.
- Bundle or Frame Packing: Pipes are secured with steel straps or wooden frames, separated by padding to avoid coating friction.
- Container Shipping: Suitable for ≤6 m pipe lengths and small or medium-sized project shipments.
- Bulk Vessel Transport: Recommended for large-diameter or long-length pipes, using timber supports and protective layering to prevent deformation.
