One-Step Flexible Pre-Insulated Pipe Line PE-RT II, PEX-a, PU Foam, HDPE Jacket

This one-step production line manufactures flexible pre-insulated pipes in a proven "pipe-in-pipe" structure: a pressure-bearing inner pipe made of PE-RT Type II or PEX-a, a polyurethane (PU) foam insulation layer, and an HDPE outer casing. An optional fibre-reinforced layer can be added to raise pressure resistance while keeping the pipe flexible. Inner pipe feeding, continuous PU foam pouring and outer casing extrusion are all completed on the same line in one continuous process.

Compared with conventional two-step equipment, this integrated process delivers 20-50% higher overall efficiency, 15-25% lower energy consumption and approximately 40% less labour.

The finished pipes are airtight and watertight, so the inner pipe is fully protected against chemical corrosion and oxidation. Being lightweight and flexible, they are supplied in long coils with minimal joints, which means a smaller trench for direct burial and a significant reduction in installation cost.

Main application: district heating networks, transferring heat from the main pipeline to residential communities and buildings. They are also widely used in building water supply and cooling systems.

KEY FEATURES
- Inner pipe rated for continuous temperatures up to 110 °C (PE-RT Type II)
- Smooth bore, free of impurities and contamination - no deposits, no flow loss
- Low-temperature heating is sufficient: 60 °C supply / 45 °C return meets normal heating demand
- Supports unattended, automated operation for heating utilities
- Simple, fast installation - excavation volume reduced by up to 40%, cutting construction cost considerably