PreInsulated Pipe Production Line Integrating HDPE Jacket Extrusion and Vacuum Calibration to Manufacture Insulated Pipes

The HDPE Jacket Casing Pipe Extrusion Line is a high-performance system engineered to produce durable protective casings for PUR (Polyurethane) foam pre-insulated pipes. Utilizing state-of-the-art vacuum calibration technology, this production line ensures that casing pipes meet rigorous international standards for thermal insulation and mechanical protection.

By integrating seamlessly into the (HDPE casing + PU foam) manufacturing workflow, our equipment delivers high-speed output while maintaining energy efficiency. The resulting pipes feature superior anti-corrosion properties and high-precision diameter accuracy, essential for long-term underground and industrial service.

Primary Applications:

• District Heating Systems: Core protection for urban thermal networks.

• Industrial Transmission: Safe transport of hot/chilled water and chemicals.

• Energy Infrastructure: Reliable casing for gas and oil pipeline networks.

• Geothermal Projects: Specialized protection for geothermal heating loops.

Note: Custom modifications are available. We can calibrate motor power and screw designs to meet your specific resin requirements.

The line utilizes a fully automated, synchronized process to ensure a "one-time forming" result, eliminating the need for secondary edge trimming.

1. Material Prep: Vacuum Loader & Hopper Dryer for moisture-free granules.

2. Extrusion: High-efficiency Single Screw Extruder for stable plasticizing.

3. Sizing: Vacuum Calibration Table for precise outer diameter control.

4. Cooling: Multi-stage Water Spraying Tanks for rapid heat dissipation.

5. Finishing: Heavy-duty Hauling Machine & Precision No-Dust Cutting System.

3.2 HDPE Jacket Production Process Flow

The production process is fully automated, simple to operate, and efficient, with the following steps:

Feeding → Drying → Plasticizing → Mold Shaping → Vacuum Sizing → Cooling → Hauling → Cutting → Final Discharge.

• Optimized Footprint: Compact design allows for flexible installation in various workshop layouts.

• One-Man Operation: High-level automation reduces labor overhead while maintaining consistency.

• Precision Engineering: Ensures uniform wall thickness and smooth internal/external surfaces to prevent PU foam leakage during the injection phase.

• Sustainability: High raw material utilization with zero-waste trimming processes.

• Proven Track Record: Over 380 production lines operational across Russia, Kazakhstan, Iran, and Nigeria.

• Engineering Depth: Backed by 9 senior engineers specializing in pipeline anti-corrosion and HDPE extrusion.

• Turnkey Solutions: We provide end-to-end support from initial plant design to on-site commissioning and staff training.

Established in 2003, Huashida Machinery has over two decades of expertise in manufacturing pipeline protection equipment. We hold multiple international patents and certifications, including ISO9001, CE, and ENC.

We are committed to providing the global market with robust HDPE jacket pipe extrusion lines (110mm to 2200mm) and comprehensive technical support. Our expert workstation in China remains at the forefront of plastic machinery innovation, ensuring your production line stays competitive for decades.