Flexible PU Foam PERT PPR HDPE Thermal Insulation Pipe Production Line

This continuous flexible pre-insulated pipe production line is a high-efficiency one-step extrusion foaming machinery professionally developed for manufacturing PERT II flexible heating insulation pipes, PPR insulated pipes and HDPE thermal insulation pipes for district heating systems. Adopting advanced integrated continuous 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 continuous workflow, realizing one-time integrated molding of high-performance buried heating insulation pipes.

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, and durable HDPE outer protective casing layer. This structural design delivers outstanding high-temperature resistance, excellent thermal insulation performance, stable sealing property, smooth inner pipe wall, superior corrosion resistance and ultra-long service life, fully meeting the strict standards of buried heating pipeline engineering.

Equipped with full automatic computerized PLC control system, this thermal 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 production solution saves up to 30% raw material consumption and reduces on-site pipeline excavation workload by 40%, delivering remarkable energy-saving and cost-reducing advantages for low-temperature district heating projects.

The core produced PE-RT II 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 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 material utilization and economic benefits.

Widely applicable for multiple infrastructure scenarios, including urban district central heating, residential and commercial building heating pipelines, industrial heating systems, central air-conditioning cold and heat exchange pipelines, and buried hot & cold fluid transmission projects. As a high-end professional insulation pipe manufacturing equipment, it has obtained CE and ISO9001 international certifications, becoming the preferred continuous flexible pre-insulated pipe production solution for global heating pipeline engineering.

What is polyurethane foam PERT insulation pipe?

Polyurethane foam PERT insulation pipe, internationally known as flexible pre-insulated heating pipe, is nationally defined as Type II heat-resistant polyethylene (PE-RT II) low-temperature direct buried heating pipe. Thanks to excellent thermal insulation performance, flexible bending property, high temperature resistance and aging resistance, it has become the most ideal pipeline material for modern underground district heating systems, widely recognized in global heating infrastructure construction.

• Inner Pipe Materials: PERT, PPR, HDPE
• Foam Layer: Polyurethane (PU) foam insulation
• Outer Sheath: HDPE protective pipe
• Control System: Fully automatic computerized control
• Certifications: CE, ISO9001, QS
• Voltage: Customizable according to customer's local standard
• Warranty: 12 months after installation

1. Pipe unwinding
2. Unwinding traction
3. V-shaped wheel conveying
4. Track feeding
5. Encapsulation and film coating
6. PU foam pouring foaming
7. Foam curing
8. HDPE outer layer O-shaped extrusion
9. Vacuum suction coating
10. Multi-stage spray cooling
11. Finished pipe winding

Widely used for urban district heating, residential community heating, commercial & industrial heating systems, central air conditioning cooling and heating pipelines, and buried hot & cold fluid transmission engineering projects.

Globally, only a few overseas manufacturers can produce professional PE-RT II low-temperature buried heating pipeline equipment, mainly concentrated in Northwest Europe, Russia and the Middle East. The global market demand for flexible pre-insulated heating pipes is rapidly growing, providing huge market potential and broad development space for our high-efficiency continuous insulation pipe production line.

We actively participate in international trading shows to showcase our advanced insulation pipe production line, enhancing brand influence and establishing cooperative relations with global customers.

We provide comprehensive after-sales service, including lifetime technical support, on-site installation, commissioning and training, ensuring customers can use the equipment smoothly and efficiently.