Continuous One-Step Flexible PERT PPR HDPE Insulation Pipe Line for District Heating

This continuous one-step flexible PERT PPR HDPE insulation pipe production line is a high-efficiency integrated extrusion foaming system professionally developed for manufacturing PE-RT II flexible heating insulation pipes, PPR insulated pipes, and HDPE thermal insulation pipes for district heating and cooling supply networks.

Adopting advanced continuous one-step extrusion foaming technology, the equipment fully automates inner pressure pipe forming, PU polyurethane foam injection insulation, film encapsulation coating, and HDPE outer casing extrusion in one uninterrupted workflow - realizing one-time integrated molding of high-performance buried district heating flexible pre-insulated pipes without batch processing or secondary operations.

The finished flexible pre-insulated pipe features a premium three-layer composite structure:

• Inner PERT/PPR/HDPE pressure pipe layer
• Closed-cell polyurethane foam thermal insulation layer
• Durable HDPE outer protective casing layer

This structure delivers outstanding high-temperature resistance (up to 110°C), excellent thermal insulation performance, stable sealing, smooth inner pipe wall, superior corrosion resistance, and ultra-long service life for buried district heating pipeline engineering.

Equipped with a fully automatic computerized PLC control system, this continuous flexible insulation pipe extrusion line supports unattended intelligent production and unlimited continuous pipe length output, greatly improving production efficiency and reducing manual labor costs.

Compared with traditional segmented insulated pipe production equipment, this continuous one-step production solution saves up to 30% raw material consumption and reduces on-site district heating pipeline excavation workload by 40% - delivering significant energy-saving and cost-reducing advantages for low-temperature district heating projects worldwide.

The core produced PE-RT II flexible heating pipe withstands stable working temperature up to 110°C - perfectly adapting to long-term high-temperature heating circulation and 60°C supply / 45°C backwater low-temperature district heating operation standards.

With optimized S-value pipe wall design, PE-RT II material achieves the thinnest wall thickness under the same pressure grade - saving 15% material compared with PERT I pipe and 30% material compared with traditional PPR hot water pipe, ensuring optimal raw material utilization and direct cost reduction for PERT PPR HDPE insulation pipe manufacturers.

Widely applicable for:

• Urban district central heating
• Residential and commercial building heating pipelines
• Industrial heating systems
• Central air-conditioning cooling and heating pipelines
• Buried hot & cold fluid transmission projects

The continuous one-step flexible PERT PPR HDPE insulation pipe manufacturing workflow is fully automated and designed for maximum uptime and minimal material waste:

Pipe unwinding → Unwinding traction → V-shaped wheel conveying → Track feeding → Encapsulation and film coating → Continuous PU polyurethane foam pouring → Foam curing → HDPE outer layer O-shaped extrusion → Vacuum suction coating → Multi-stage spray cooling → Finished flexible pre-insulated pipe winding

Our continuous one-step PERT/PPR/HDPE polyurethane foam flexible insulation pipe line has passed ISO9001:2008 certification by SGS - ensuring product quality meets international standards and facilitating global district heating pipeline market access.

We provide comprehensive after-sales service including lifetime technical support, on-site installation, commissioning and training - ensuring customers operate their continuous one-step flexible PERT PPR HDPE insulation pipe line smoothly and efficiently from day one.