Product Specification

Fully Automatic Vacuum-Calibrated Insulated Pipe Production Line

Redefine your insulation manufacturing efficiency. This cutting-edge HDPE Jacket Pipe Extrusion Line, engineered by Qingdao Huashida Machinery Co., LTD, represents the pinnacle of pre-insulated pipe technology. By utilizing advanced vacuum calibration, this line produces pipes with superior stiffness, unmatched pressure resistance, and a flawless surface finish.

Core Technical Advantages: Why Vacuum Calibration?

Compared to traditional internal pressure methods, our vacuum calibration system offers:

1. Enhanced Stiffness: Ensures structural integrity for large-diameter pipes under high soil pressure.

2. Superior Surface Finish: Delivers an impeccably smooth exterior, reducing friction and enhancing aesthetics.

3. High Automation: Seamlessly integrates the entire process from raw material to finished stack.

4. Extended Service Life: Robust mechanical design ensures 24/7 industrial stability with minimal maintenance.

Technical Parameters

Production Process Flow

I. HDPE Jacket Extrusion Journey

1. Vacuum Feeding: Automatic transport of PE granules to eliminate manual contamination.

2. Hot Air Drying: Ensures material purity and prevents bubbles in the pipe wall.

3. Plasticizing Extrusion: High-efficiency melting via our SJ-series single screw extruders.

4. Vacuum Sizing & Cooling: Precise shaping within vacuum tanks followed by rapid water solidification.

5. Precision Cutting: Pipes are automatically cut to length and moved to the stacking area.

II. PU Foaming "Pipe-in-Pipe" Process

1. Surface Pretreatment: Steel pipes are cleaned to ensure maximum bonding with insulation.

2. Casing Assembly: The steel pipe is inserted into the HDPE jacket using centered supports.

3. Sealing: Both ends are secured with flanges to prepare for injection.

4. High-Pressure Foaming: Advanced PU material is injected into the annular space.

5. Curing & Finishing: The assembly is cured, seals are removed, and the insulated pipe is ready for dispatch.

Main Equipment List

1. Hopper Dryer: Optimized moisture removal for superior material processing.

2. Single Screw Extruder: High-torque design for consistent and massive output.

3. Extrusion Mould Die: Precision-engineered for uniform wall thickness.

4. Head Bracket: Heavy-duty support ensuring stability during high-speed extrusion.

5. Vacuum Calibration Device: The core technology for achieving industry-leading pipe dimensions.

6. Water Cooling Tank: Multi-stage cooling system to maintain pipe integrity.

7. Haul-off Unit: Synchronized pulling for consistent pipe thickness and speed.

8. Planetary Cutting Machine: Delivers burr-free, high-precision cuts for all pipe sizes.

9. Automatic Loader: Streamlines material handling and reduces labor intensity.

10. PLC Control System: Smart automation for real-time monitoring and data management.

11. Pipe Stacking Bracket: Robust support for organized final product handling.

About Qingdao Huashida Machinery

Established in 2003, Qingdao Huashida is a global leader in plastic extrusion technology:

1. Innovation Power: Holder of over 30 technical patents and developer of national-standard equipment.

2. Quality Assurance: Fully certified with ISO 9001, ISO 14001, CE, SGS, and DVGW.

3. Global Collaboration: Technical partnerships with Tsinghua University and other top-tier research institutes.

4. Expert Team: Over 70 professionals, including 10+ senior engineers, operating from a 4,000 sqm facility.