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.

• 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

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.

• PERT II Pipes Can Tolerate Temperatures of 110°C, ensuring stable operation in high-temperature working environments
• Pipeline smooth, no impurities, no pollution, meeting environmental protection and fluid transportation standards
• Heating companies can realize unattended, automated operation, improving production efficiency and reducing labor costs
• Low temperature heating design, with 60°C supply water and 45°C backwater to fully meet daily heating demand
• The construction is simple and convenient, and the excavation amount is reduced by 40%, greatly lowering overall construction costs

Compared to PERT I, PE-RT II can reduce material use by 15%; relative to PP-R, PE-RT II can reduce material use by 30%. With optimized S-value pipe wall design, PE-RT II material achieves the thinnest wall thickness under the same pressure grade.

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

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.