Coil Tube (Coiltube) — Intelligent Scheduling & Anti-Swing System Specification
1. Product Overview
The Coil Tube (Coiltube) product line developed by Wenzhou Jixing Metal Materials Co., Ltd. represents a high-performance continuous coil tube solution designed for industrial heat exchange, refrigeration, and fluid transport applications. This product integrates advanced intelligent production scheduling algorithms with precision anti-swing (transplant anti-vibration) control technology to ensure consistent dimensional accuracy, surface integrity, and mechanical reliability throughout the manufacturing and deployment lifecycle.
The system architecture addresses critical challenges in coil tube production lines, including dynamic load balancing during coil transfer operations, real-time production sequencing optimization, and minimization of mechanical oscillation during material handling. These innovations collectively reduce product defect rates, improve throughput efficiency, and extend the service life of downstream equipment.
2. Material & Properties
2.1 Base Material Composition
Coil tubes in this product family are fabricated from high-purity copper alloys (Cu) or stainless steel grades (e.g., SUS304, SUS316L), selected based on application-specific requirements for thermal conductivity, corrosion resistance, and mechanical strength.
- Copper Alloy (Cu-Be, Cu-Al): Superior thermal conductivity (up to 390 W/m·K), excellent formability, and resistance to dezincification under controlled conditions.
- Stainless Steel (SUS304/SUS316L): Chromium-Nickel austenitic structure providing outstanding resistance to oxidative and acidic corrosion environments; SUS316L additionally contains Molybdenum (Mo) for enhanced pitting resistance.
2.2 Key Mechanical & Thermal Properties
| Property | Copper Coil Tube | Stainless Steel Coil Tube (SUS304) |
|---|---|---|
| Thermal Conductivity (W/m·K) | 350–390 | 16.3 |
| Tensile Strength (MPa) | 250–350 | 520–720 |
| Elongation at Break (%) | 25–40 | 40–60 |
| Operating Temperature Range (°C) | −196 to 200 | −196 to 800 |
| Corrosion Resistance | Moderate (selective environments) | Excellent (broad spectrum) |
3. Specifications
| Parameter | Specification Range |
|---|---|
| Outer Diameter (OD) | 6.0 mm – 50.8 mm (¼" – 2") |
| Wall Thickness | 0.3 mm – 1.2 mm |
| Coil Length per Spool | 50 m – 500 m |
| Coil Diameter (Max) | 300 mm – 1,200 mm |
| Bend Radius (Min.) | 3× OD |
| Surface Finish | Mirror polished (Ra ≤ 0.1 μm) / Matte / Passivated |
| Tolerance (OD) | ±0.05 mm |
| Tolerance (Wall Thickness) | ±0.02 mm |
| Production Line Speed | Up to 60 m/min (with intelligent scheduling optimization) |
| Anti-Swing Control Accuracy | ≤ 0.5 mm deviation during coil transplant operations |
4. Manufacturing Process
4.1 Process Flow
- Raw Material Inspection & Coiling: Incoming strip material undergoes spectroscopic analysis (OES) and ultrasonic testing for internal defect detection. Material is coiled onto precision wound spools with controlled tension.
- Coil Loading & Transplant Anti-Swing Control: The intelligent transplant anti-swing system employs multi-axis servo-driven manipulators with real-time inertial measurement units (IMUs) and PID feedback loops to minimize lateral oscillation during coil transfer between stations. This ensures precise alignment and prevents surface damage or deformation.
- Forming & Bending: Multi-station progressive forming machines shape the strip into tubular profiles. Computer Numerical Control (CNC) bending stations create coil geometries with controlled curvature radii.
- Welding (if applicable): High-frequency induction welding or orbital TIG welding joins tube seams with full-penetration integrity. Weld quality is verified via automated optical inspection (AOI) and eddy current testing.
- Heat Treatment & Annealing: Controlled furnace annealing relieves residual stresses and restores ductility. Temperature profiles are managed via programmable logic controllers (PLCs) with ±2°C accuracy.
- Surface Treatment: Electropolishing, passivation, or mechanical polishing achieves specified surface roughness grades. For stainless steel variants, acid pickling removes heat scale and restores chromium oxide passivation layer.
- Final Coiling & Packaging: Finished coil tubes are wound onto protective cores with anti-abrasion interleaving layers and packaged for shipment.
4.2 Intelligent Production Scheduling System
The production line integrates a proprietary intelligent scheduling system based on mixed-integer linear programming (MILP) and genetic algorithm (GA) optimization. Key capabilities include:
- Real-time Order Sequencing: Dynamic re-prioritization of production jobs based on delivery deadlines, material availability, and machine utilization rates.
- Predictive Maintenance Integration: Machine health monitoring via vibration analysis and thermal imaging enables proactive maintenance scheduling, reducing unplanned downtime by up to 40%.
- Energy Optimization: Load-balancing algorithms distribute production across shifts to minimize peak energy consumption and reduce carbon footprint.
- Quality Traceability: Each coil spool is assigned a unique identification code linked to full production parameter history, enabling complete traceability from raw material to finished product.
5. Applications
- Refrigeration & Air Conditioning (HVAC): Condenser and evaporator coil tubes exploiting superior thermal exchange efficiency.
- Automotive Industry: Radiator cores, intercoolers, and fuel line assemblies requiring high-pressure resistance and vibration tolerance.
- Chemical Processing: Heat exchanger tubes in corrosive environments (SUS316L grade with Mo content for pitting resistance).
- Medical Equipment: Sterilizable tubing for autoclavable instruments and fluid delivery systems requiring mirror-polished surfaces.
- Food & Beverage Processing: Hygienic-grade tubing for CIP (Clean-in-Place) compatible fluid transport systems.
- Cryogenic Applications: Low-temperature service in LNG (Liquefied Natural Gas) transport and superconducting magnet cooling circuits.
6. Quality Certifications & Standards Compliance
| Standard / Certification | Description |
|---|---|
| ISO 9001:2015 | Quality Management System certification ensuring consistent product quality and process control. |
| ISO 14001:2015 | Environmental Management System certification for sustainable manufacturing practices. |
| ASME B&W | American Society of Mechanical Engineers Boiler & Pressure Vessel Code compliance for pressure-containing applications. |
| EN 10217 | European standard for seamless stainless steel tubes for pressure purposes. |
| ASTM B751 | Standard specification for wrought copper and copper alloy tubing. |
| GB/T 12771 | Chinese national standard for seamless stainless steel tubes for fluid transport. |
| NSF/ANSI 61 | Drinking water system components certification (for food-grade applications). |
| 3.1 Material Certificate | EN 10204 Type 3.1 mill test certificates provided with each shipment for chemical and mechanical property verification. |
7. Unique Selling Points
Intelligent Anti-Swing Technology: Industry-leading transplant anti-swing system reduces coil handling deviations to ≤ 0.5 mm, significantly lowering surface defect rates and improving dimensional consistency across production batches.
Adaptive Scheduling Intelligence: Proprietary algorithm-driven production scheduling optimizes throughput while maintaining quality parameters, achieving up to 35% improvement in overall equipment effectiveness (OEE).
End-to-End Traceability: Full digital thread from raw material certification through final inspection ensures complete accountability and accelerates root-cause analysis in the event of field performance issues.
Multi-Material Flexibility: Production infrastructure supports seamless transitions between copper alloy and stainless steel coil tube orders without line reconfiguration downtime, maximizing asset utilization.