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PU Spraying and PE Winding Pre-insulated Pipe Production Line
The Polyurethane Spraying Polyethylene Winding Pre-insulated Pipe Production Line is independently developed by Qingdao Huashida Machinery Co., Ltd., and holds multiple national patents. According to third-party standardization evaluation, it achieves a Level 5 technological advancement, reaching the domestic advanced level.
Awarded the title of First Set of Technical Equipment in Shandong Province, this production line features either continuous or intermittent spraying processes. It offers high automation, fast production speed, material savings, increased closed-cell rate, reduced water absorption, integrated molding, reliable performance, low carbon footprint, and outstanding economic and social benefits.
The production line is composed of three major parts:
Steel Pipe Shot Blasting Machine
Polyurethane Spraying Production Line
PE Outer Jacket Winding Production Line
External shot blasting for steel pipe rust removal
Steel pipe transferred to spraying conveyor line via pipe transport cart
Pipe preheating
Polyurethane foam spraying
Pipe transported to storage platform by lifting cart
PE jacket winding
Water cooling
Connection cutting
Finished pipe inspection
Pipe end repairing
Spray coding and packaging
1. Environmentally Friendly Dust Removal
Intelligent shot blasting and rust removal system with sequential startup and self-lock protection
Variable frequency motor for energy saving
Adjustable sand blasting volume according to pipe diameter
Air cleaning system for steel shots
Quick-change plug-type design for different pipe specifications
Three-stage dust removal system meeting environmental standards
2. Continuous Production for Large-Diameter Pipes
High-load spiral conveyor system ensures continuous PU spraying and PE winding
High efficiency, energy-saving, fast speed, and stable operation
Suitable for continuous large-diameter pre-insulated pipe production, saving transport equipment investment
3. Fully Automated Production Line
Automated pipe loading/unloading
Conveyor line equipped with upper pipe sensors, acceleration tracking sensors, detachment confirmation sensors, and descent sensors
Ensures fully automated operation with minimized manual intervention
4. Material-Saving Spraying Technology
High-speed on-line spraying
Constant medium-frequency power supply with stable temperature control
Continuous spraying reduces raw material wastage and ensures uniform surface thickness at pipe heads and tails
5. Efficient PE Jacket Extrusion and Winding
High-efficiency, energy-saving extruders
Mechanical clamping for winding and compacting
Automatic triple cutting of anti-corrosion layers and automatic pipe detachment during offline production
6. Automated Precision Machining for Pipe Ends
Centralized processing for cutting, chamfering, and blunt edge control
Ensures high accuracy for pipe end dimensions and improves welding quality
| Steel Pipe Diameter (mm) | Insulation Thickness (mm) | Outer Jacket Diameter (mm) | Minimum Outer Jacket 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 |
Production Line Parameters:
Steel Pipe Diameter Range: 206mm-1820mm
Processing Capacity: ≤250м²/h
Surface Cleaning Level: Sa2.5
Raw Materials Used: ISO (Isocyanate), POLY (premixed polyether polyols), PE (Polyethylene)
Main Equipment: Shot Blasting and Rust Removal Line, Polyurethane Spray Line, PE Winding Line
1.Awarded First Set Technical Equipment in Shandong Province
2. Standardization Evaluation Report from Qingdao City
3. Multiple National Patents
4. High Intelligence and Automation, Reducing Labor Costs
5. High Efficiency and Energy Saving, Lower Production Costs
6. Stable and Reliable Performance, High Finished Product Rate, Minimal Waste
Improved mechanical properties of the outer jacket
Reduced outer jacket wall thickness, saving materials
Lower water absorption rate of the insulation layer
Higher closed-cell rate of the foam insulation
Better uniformity of insulation density
Higher compressive strength of insulation layer
Reduced thermal conductivity, minimizing heat loss
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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