Steel-Plastic Interface Enhancement and High-Pressure Transportation Technology of Steel Wire Mesh Reinforced Composite Pipes ——Multi-Scenario Pressure Pipeline Applications Based on CJ/T 189 Standard

1. Research Background

• Interfacial peel strength <40N/cm (CJ/T 189-2019 limit)
• Max pressure 3.5MPa with single-layer winding
• >3% deflection in large-diameter pipes

2. Core Issue: Interface Failure Mechanism

2.1 Bonding Mechanism

• Mechanical interlock failure (55%): Insufficient roughness (Ra <3.2μm)
• Chemical failure (30%): Polar mismatch between HDPE and steel
• Environmental failure (15%): Hydrolysis under water-oxygen exposure

2.2 Key Parameters

3. Composite Structure Optimization

3.1 Interface Enhancement

• Nano-silane forms chemical bonds (Figure 2), shear strength +195%
• MA-g-PE creates interpenetrating network with HDPE

3.2 Multi-Layer Winding

4. High-Pressure System Innovation

4.1 Gradient Pressure Structure

• Inner layer: 40% higher wire density, bears 80% internal pressure
• Outer layer: 25% lower modulus, absorbs external impacts

4.2 Smart Electrofusion Joint

• Joint strength 98% of pipe body
• Real-time temperature monitoring (±1℃ accuracy)
• Construction efficiency +40%

5. Engineering Solutions

5.1 High-Pressure Design Standard

5.2 Full-Scenario Construction

1. Interface inspection: Ultrasonic thickness measurement
2. Deflection monitoring: Laser inclinometer <2%
3. Pressure test: 1.5× working pressure for 2h
4. Temperature control: Automatic temperature compensation
5. Tracer labeling: Electronic tags every 50m

6. Field Test Case: Petrochemical Plant

7. Advanced Technology Prospects

7.1 Self-Diagnostic Smart Pipe

7.2 Low-Carbon Manufacturing