X60/X70 3PE Coated Steel Pipe with 30+ Years Underground Resistance
Detailed specification for X60/X70 3PE Coated Steel Pipe with 30+ Years Underground Resistance
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| Model NO. | DN 10-100 |
| Length | Custom Length |
| Outer Diameter | 32 |
| Surface Finish | 3LPE Coating |
| Coating Structure | 3lpe Three-Layer |
| Material Grade | X42/X52/X60/X70/X80 |
| Corrosion Resistance | Underground 30+ Years |
| Application Scenario | Oil/Gas Pipeline |
| Specification | Customizable |
| Trademark | FX |
| Origin | China |
| HS Code | 7305110000 |
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
Wall Thickness: 4mm–20mm
Length
6/12m (customizable)
Manufacturing Process
Steel pipe substrate + 3-layer anti-corrosion coating
Coating Structure
3-layer system:
1. Epoxy powder (FBE) inner layer
2. Adhesive middle layer
3. Polyethylene (PE) outer layer
Coating Thickness
FBE ≥300μm
Adhesive ≥170μm
PE ≥2.5mm
Performance Highlights
Superior corrosion resistance
Resistant to chemical erosion & soil stress
Smooth inner wall reduces fluid friction
Standards
GB/T 23257-2017 (Chinese National Standard), ISO 21809-1 (International Standard), DIN 30670, etc.
Typical Applications
Buried oil & gas pipelines
Chemical medium transfer
Municipal sewage networks
Coastal & saline-alkali soil projects
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