SYP Series Stainless Steel Coil Tube for Axial Flow Fan Applications
Product Overview
The SYP Series Stainless Steel Coil Tube (盘管) is a precision-engineered tubular component manufactured by Wenzhou Jixing Metal Materials Co., Ltd (Product No. 629). This coil tube is specifically designed for integration into axial flow fan assemblies, serving as the primary structural framework for air-circulation systems. The product embodies advanced metallurgical processing techniques and laser-welded blade attachment methodologies, ensuring superior aerodynamic performance, mechanical durability, and long-term corrosion resistance in demanding industrial environments.
The coil tube forms the core structural element of the SYP Series fan system, where galvanized steel blades are joined to the coil tube body via high-precision laser welding processes. This construction methodology eliminates traditional mechanical fasteners, reducing vibration, noise, and potential failure points in high-speed rotating applications.
Material & Properties
The SYP Series Coil Tube is fabricated from high-grade stainless steel (奥氏体不锈钢), predominantly conforming to AISI 304 or AISI 316L specifications, selected for their exceptional combination of mechanical strength, corrosion resistance, and formability. The material properties are as follows:
- Base Material: Cold-rolled stainless steel coil strip (冷轧不锈钢带材), with optional galvanized steel (镀锌钢板) blade components
- Tensile Strength (抗拉强度): ≥ 520 MPa (AISI 304) / ≥ 550 MPa (AISI 316L)
- Yield Strength (屈服强度): ≥ 205 MPa
- Elongation (延伸率): ≥ 40%
- Hardness (硬度): ≤ 92 HRB
- Corrosion Resistance (耐腐蚀性): Superior resistance to atmospheric, chemical, and thermal oxidation environments
- Thermal Stability (热稳定性): Operational temperature range from −196°C to +870°C
- Surface Finish (表面光洁度): Ra ≤ 0.8 μm (polished finish available upon request)
Specifications
| Parameter | Specification |
|---|---|
| Product Designation | SYP Series Coil Tube (盘管) |
| Product No. | 629 |
| Material Grade | AISI 304 / AISI 316L (ASTM A213 / ASTM A269) |
| Outer Diameter Range (外径) | Φ 50 mm – Φ 500 mm (customizable) |
| Wall Thickness (壁厚) | 0.5 mm – 3.0 mm |
| Coil Pitch / Spacing (盘间距) | 10 mm – 50 mm (adjustable per application) |
| Number of Turns (圈数) | 2 – 20 turns |
| Overall Length (总长度) | 200 mm – 3,000 mm |
| Blade Material (叶轮材质) | Galvanized Steel (镀锌钢板) |
| Welding Process (焊接工艺) | Laser Welding (激光焊接) |
| Welding Penetration (焊缝熔深) | ≥ 95% full penetration |
| Weld Seam Width (焊缝宽度) | 0.8 mm – 1.5 mm |
| Surface Treatment (表面处理) | Pickling & Passivation (酸洗钝化) / Mirror Polish |
| Maximum Operating Speed (最高转速) | 3,600 RPM (with balanced blades) |
| Dynamic Balance Grade (动平衡等级) | G6.3 (ISO 21940-11) |
Manufacturing Process
The production of the SYP Series Coil Tube adheres to a rigorous, multi-stage manufacturing protocol that ensures dimensional accuracy, metallurgical integrity, and functional reliability:
- Raw Material Inspection (原材料检验): Incoming stainless steel coil strip undergoes spectroscopic analysis (光谱分析) for chemical composition verification and tensile testing for mechanical property confirmation. Certificates of Analysis (COA) are cross-referenced with purchase orders.
- Slitting & Leveling (分条矫平): The master coil is slit to the required strip width using precision slitting lines, followed by leveling to eliminate residual stresses and ensure flatness tolerances within ±0.1 mm/m.
- Coil Forming (盘管成型): The flat strip is wound into the specified coil geometry using CNC-controlled spiral forming machinery. This process maintains uniform wall thickness and consistent inter-turn spacing throughout the coil length.
- Welding (焊接): The coil seam is sealed using automated longitudinal welding (TIG or laser welding) to achieve leak-tight joints. Galvanized steel blades are then attached to the coil tube body via laser welding (激光焊接), a process that minimizes heat-affected zone (HAZ) distortion while ensuring full-penetration weld integrity.
- Heat Treatment (热处理): Post-welding stress relief annealing is performed at 620°C ± 10°C to eliminate residual stresses introduced during forming and welding, restoring optimal mechanical properties.
- Surface Treatment (表面处理): Pickling and passivation (酸洗钝化) treatment removes oxidation scales and forms a protective chromium oxide layer, enhancing long-term corrosion resistance.
- Dynamic Balancing (动平衡): Completed coil tube assemblies undergo dynamic balancing at operating speeds to achieve ISO G6.3 grade balance, ensuring smooth operation at maximum RPM.
- Final Inspection (终检): Comprehensive dimensional verification, weld integrity testing (penetrant inspection per ASTM E165), and pressure testing (per ASTM A269) confirm compliance with all specifications prior to dispatch.
Applications
The SYP Series Stainless Steel Coil Tube is engineered for use in a broad spectrum of industrial and commercial ventilation and air-handling applications:
- Industrial Ventilation Systems (工业通风系统): Axial flow fans for factory exhaust, dust extraction, and process air circulation
- Chemical Processing Plants (化工处理装置): Corrosive gas handling and fume extraction where stainless steel corrosion resistance is critical
- Food & Pharmaceutical Processing (食品及制药加工): Hygienic-grade ventilation compliant with FDA and GMP standards
- Marine & Offshore Equipment (海洋及海上设备): Ventilation systems exposed to saltwater and high-humidity environments
- Building HVAC Systems (建筑暖通空调系统): Supply and exhaust air handling in commercial and industrial facilities
- Power Generation Facilities (发电设施): Cooling air circulation in power plant boiler and turbine rooms
- Warehouse & Cold Storage (仓储及冷库): High-volume air circulation for temperature and humidity control
Quality Certifications & Standards Compliance
Wenzhou Jixing Metal Materials Co., Ltd maintains a comprehensive quality management framework ensuring that every SYP Series Coil Tube meets international standards:
- ISO 9001:2015 — Quality Management System Certification
- ISO 14001:2015 — Environmental Management System Certification
- ISO 45001:2018 — Occupational Health and Safety Management System
- ASTM A213 — Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing
- ASTM A269 — Standard Specification for Seamless and Welded Austenitic Stainless Steel Pipe, Tubing, and Fittings
- GB/T 12771 — Chinese National Standard for Welded Stainless Steel Tubing
- EN 10216-5 — European Standard for Heat-Resistant Stainless Steel Tubes
- JIS G3446 — Japanese Industrial Standard for Austenitic Stainless Steel Tubes
- Weld Quality: Compliant with ISO 5817 (Weld Quality Levels — Level B) and AWS D1.6 (Stainless Steel Welding Code)
Unique Selling Points
- Laser-Welded Blade Integration: The proprietary laser welding process for attaching galvanized steel blades to the stainless steel coil tube eliminates mechanical fasteners, reducing weight, improving aerodynamic efficiency, and extending service life.
- Precision Coil Geometry: CNC-controlled forming ensures uniform coil pitch and dimensional accuracy, critical for maintaining balanced airflow and minimizing vibration at high rotational speeds.
- Dual-Material Construction: The combination of corrosion-resistant stainless steel coil tube with cost-effective galvanized steel blades optimizes the strength-to-cost ratio without compromising performance.
- Full Traceability: Each coil tube is serialized with material traceability documentation from raw material through final inspection, ensuring complete supply chain accountability.
- Customization Capability: Flexible customization of coil diameter, pitch, turn count, and blade configuration to meet specific OEM and end-user requirements.
Manufacturer's Note: Wenzhou Jixing Metal Materials Co., Ltd guarantees that all SYP Series Coil Tubes (Product No. 629) conform to the specifications outlined herein. Technical data sheets, material test reports (MTR), and welding procedure qualifications (WPQ) are available upon request. Custom engineering solutions are available for non-standard applications.