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Help CenterAnti-Corrosion Pipe API 5L Oil and Gas Pipeline DIN 30670 3PE/2PE Tpep Coated Anticorrosive ERW Steel Pipe
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Product Description
3LPE (Three-Layer Polyethylene) anti-corrosion steel pipes are composed of a fused epoxy powder (FBE) base layer, an adhesive intermediate layer, and a polyethylene (PE) outer layer. They are specifically designed for long-distance, large-diameter pipelines in harsh environments such as buried and underwater applications.
Anti-corrosion Layer Structure and Thickness
• Base Layer (FBE Epoxy Powder):
• Function: Provides basic adhesion and cathodic disbondment protection
• Typical Thickness: Standard grade ≥80μm, Reinforced grade 100-400μm
• Intermediate Layer (Adhesive):
• Function: Bonds the epoxy layer and the polyethylene layer
• Typical Thickness: 170-250μm
• Outer Layer (Polyethylene PE):
• Function: Provides mechanical protection, waterproofing, and wear resistance
Key Performance and Test Indicators
• Cathodic Disbondment Radius (70℃, 48h): ≤15mm (Key indicator of anti-corrosion layer stability)
• Impact Strength (23℃): ≥10J (Measures resistance to mechanical damage)
• Adhesive Peel Strength (23℃): ≥70N/cm (Measures interlayer bonding strength)
• Polyethylene Layer Elongation at Break: ≥600% (Measures flexibility)
Application Environment Parameters
• Long-term Operating Temperature: Typically -20℃ to 70℃, some products have higher design temperatures
• Design Life: Can reach over 50 years under standard conditions
• Main Standards: GB/T 23257-2017 (Chinese National Standard), ISO 21809-1 (International Standard), DIN 30670, etc.
Product Name |
3LPE Anti-Corrosion Coated Steel Pipe |
Base Material |
Carbon steel (Q235B, L245, L360, Q345B, X42-X80) |
Specification Range |
Outer Diameter: 40mm–4000mm |
Length |
6/12m (customizable) |
Manufacturing Process |
Steel pipe substrate + 3-layer anti-corrosion coating |
Coating Structure |
3-layer system: |
Coating Thickness |
FBE ≥300μm |
Performance Highlights |
Superior corrosion resistance |
Standards |
GB/T 23257-2017 (Chinese National Standard), ISO 21809-1 (International Standard), DIN 30670, etc. |
Typical Applications |
Buried oil & gas pipelines |
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