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Innovative Technology, Advanced Manufacturing
Developed independently by Qingdao Huashida, the Polyurethane Spraying & Polyethylene Winding Pre-insulated Pipe Production Line holds multiple national patents and has been certified as domestically advanced technology (Level 5) by third-party standardization evaluations. Recognized as Shandong Province's First (Set) Technical Equipment, this production line integrates high automation, energy efficiency, and superior product performance, making it a leading solution in the insulation pipe industry. 
The production line consists of three key systems:
Steel Pipe Shot Blasting Machine - For rust removal and surface preparation.
Polyurethane Spraying Production Line - For uniform insulation layer application.
PE Winding Production Line - For durable outer protective layer formation.
Steel Pipe Surface Treatment - Shot blasting removes rust from the outer wall.
Pipe Conveyance & Heating - Automated transfer to the spraying line with pre-heating.
Polyurethane Spraying - Continuous/intermittent foam application for optimal insulation.
PE Winding & Cooling - High-density polyethylene wrapping followed by water cooling.
Cutting & Finishing - Precision trimming, inspection, and end-sealing.
Packaging & Dispatch - Final marking and packaging for shipment.
Eco-Friendly Rust Removal
Intelligent shot blasting with energy-saving frequency conversion motors.
Sand volume adjustable by pipe diameter, with quick-change specifications.
Three-stage dust removal ensures compliance with environmental standards.
High Efficiency for Large-Diameter Pipes
Heavy-duty spiral conveyor enables continuous production.
Suitable for DN500-DN1500mm pipes, improving output while reducing transport costs.
Fully Automated Operation
Smart sensors for pipe positioning, tracking, and detachment.
Automated loading/unloading minimizes manual intervention.
Material & Energy Savings
Fast spraying speed with consistent thickness control.
Closed-cell foam structure reduces water absorption and improves insulation.
Energy-efficient extruders for PE winding with automatic cutting.
Precision Pipe End Machining
Automated chamfering and trimming for accurate dimensions.
Ensures seamless joint connections in pipeline systems.
| Steel Pipe Diameter (mm) | Insulation Thickness (mm) | Outer Protective Pipe Diameter (mm) | Min. PE Wall Thickness (mm) |
|---|---|---|---|
| 500 | 30-60 | 580-640 | 5.6 |
| 630 | 30-60 | 710-772 | 6.6 |
| 710 | 30-60 | 790-850 | 7.2 |
| 800 | 30-60 | 885-950 | 7.9 |
| 900 | 30-60 | 980-1054 | 8.7 |
| 1000 | 30-60 | 1090-1155 | 9.4 |
| 1100 | 30-60 | 1190-1250 | 10.2 |
| 1200 | 40-100 | 1316-1436 | 11 |
| 1400 | 50-100 | 1538-1638 | 12.5 |
| 1500 | 50-100 | 1638-1738 | 12.5 |
Steel Pipe Range: 206mm-1820mm
Capacity: ≤250м²/h
Surface Cleaning Grade: Sa2.5
Materials Used: Isocyanate (ISO), Polyether Polyols (POLY), Polyethylene (PE)
Stronger PE Outer Layer - Enhanced mechanical properties with reduced wall thickness.
Superior Insulation Performance - Higher closed-cell rate (≥95%), lower water absorption.
Uniform Density & Compression Strength - Improved structural integrity.
Low Thermal Conductivity - Minimizes heat loss for energy-efficient pipelines.
Award-Winning Technology - Recognized as Shandong's First (Set) Technical Equipment.
Certified & Patented - Multiple national patents and Qingdao Scientific Achievement Standardization Certification.
Smart Automation - Reduces labor costs while improving precision.
Eco-Friendly & Cost-Effective - Low material waste, high yield, and energy-efficient operation.
Global Applications - Successfully exported to Saudi Arabia (Jeddah Company), proving international competitiveness.
Qingdao Huashida Machinery Co., Ltd was established in 2003. Since its inception, Huashida has focused on plastic polyurethane insulation pipe production line, 3PE anti-corrosion pipe production line, large diameter underground pipe production line and plastic pipe joints for 20 years. We always attach great importance to research and development,
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