Stainless Steel Coil Tube for Rotary & Swing-Arm Pay-Off Reel Systems
Wenzhou Jixing Metal Materials Co., Ltd. — Product No. 215 | Installation & Maintenance Division | Uncoiling Operations | Dedicated Pay-Off Reel Accessories
Wenzhou Jixing Metal Materials Co., Ltd. supplies high-performance stainless steel coil tubes engineered specifically for use with rotary (turntable-type) and swing-arm pay-off reel systems. These coil tubes are designed to be laid flat on the reel platform and fed axially through controlled rotational uncoiling, ensuring consistent, kink-free deployment during field installation and maintenance operations across industrial, HVAC, pharmaceutical, and food processing sectors.
Product Overview
The stainless steel coil tube described herein is a precision-wound, continuous-length tubing product supplied in coil form for convenient transport, storage, and on-site deployment. Unlike straight-length pipe, coil tube enables uninterrupted installation runs without field butt-welding or mechanical joint interruptions, significantly reducing installation time, leak risk, and labor cost.
This product is purpose-built for integration with rotary-type (turntable) pay-off reels and swing-arm pay-off devices. The coil is placed flat on the rotary platform, and the tube is released through axial rotation of the reel — a method that applies uniform, low-tension feed forces to the tube wall, preserving dimensional integrity and surface finish throughout the entire deployment length.
Key Engineering Principles & Unique Selling Points
- Zero-Kink Deployment: The rotary pay-off method applies tangential rotational force rather than axial pulling force, fundamentally eliminating the risk of kinking, buckling, or local plastic deformation that plagues drag-out or straight-pull uncoiling methods.
- Surface Preservation: Controlled rotational uncoiling prevents ground-contact abrasion, maintaining the original cold-worked finish, passivated surface chemistry, and dimensional tolerances of the tube.
- Continuous-Length Advantage: Coil supply eliminates field joints, reducing potential leak points and improving system reliability in high-purity or pressure-critical applications.
- Ground-Drag Prohibition: Strict adherence to the no-ground-dragging protocol ensures that the tube's external surface, internal bore, and metallurgical structure remain uncompromised from coil to final installation point.
- Material Efficiency: Continuous coil deployment minimizes offcut waste, delivering up to 98–99% material utilization compared to cut-length pipe supply.
Material & Properties
Wenzhou Jixing coil tubes are manufactured from high-purity austenitic and austenitic-ferritic stainless steel grades, selected to meet the mechanical, corrosion resistance, and hygiene requirements of the target application.
- Available Grades: SUS304 / AISI 304, SUS304L / AISI 304L, SUS316 / AISI 316, SUS316L / AISI 316L, SUS321 / AISI 321, SUS310S / AISI 310S, and duplex grades (2205/UNS S31803) upon request.
- Corrosion Resistance: Excellent resistance to atmospheric, chemical, and aqueous corrosion environments. 316L grade offers superior resistance to chlorides and pitting.
- Mechanical Properties: Cold-worked coil tube provides enhanced tensile strength and fatigue resistance compared to annealed equivalents, while retaining adequate ductility for bending and forming during installation.
- Hygienic Compliance: Available with electropolished (Ra ≤ 0.4 μm) or mechanically polished internal finishes suitable for pharmaceutical, biotech, and food-grade applications.
- Temperature Range: Operational capability from cryogenic temperatures (−196 °C) to 870 °C (304/304L), 800 °C (316/316L), and 1150 °C (310S).
- Non-Magnetic (in annealed condition): Suitable for applications requiring low magnetic permeability.
Specifications
| Parameter | Specification / Range |
|---|---|
| Product Category | Stainless Steel Coil Tube (盘管 Coiltube) |
| Product No. | 215 |
| Primary Application Class | Installation & Maintenance — Uncoiling Operations |
| Dedicated Equipment | Rotary (Turntable) Pay-Off Reel / Swing-Arm Pay-Off Device |
| Uncoiling Method | Coil laid flat on rotary platform; axial rotation feed |
| Outer Diameter (OD) | Ø6 mm – Ø108 mm (custom diameters available) |
| Wall Thickness (WT) | 0.5 mm – 3.0 mm (standard); up to 6.0 mm on request |
| Coil Length | 50 m – 500 m per coil (application-dependent) |
| Coil Inner Diameter (ID) | Ø200 mm – Ø600 mm (matched to pay-off reel platform) |
| Surface Finish | No. 1, 2B, BA, Electropolished (Ra ≤ 0.4 μm), or custom |
| Dimensional Tolerance | ±0.05 mm (OD); ±10% (WT) |
| Standards Compliance | ASTM A269 / A270, EN 10217, ISO 13979, GB/T 12771 |
| Critical Handling Requirement | Ground dragging is strictly prohibited. Kinking renders the tube section scrap. |
Manufacturing Process
The production of Wenzhou Jixing stainless steel coil tube follows a rigorous, multi-stage process to ensure dimensional accuracy, metallurgical integrity, and surface quality:
- Raw Material Selection: High-purity stainless steel strip or wire is sourced from certified mills with full chemical composition documentation and mill test reports.
- Coil Winding: Precision-controlled winding machines form the tube into tight, uniform coils with consistent lay angle, ensuring smooth uncoiling on rotary pay-off reels.
- Cold Drawing / Rolling: Tubes are cold-worked to achieve target outer diameter, wall thickness, and enhanced mechanical properties while maintaining surface finish quality.
- Heat Treatment (if required): Solution annealing and controlled cooling for grades requiring stress relief or specific microstructural conditions.
- Surface Treatment: Pickling, passivation, and optional electropolishing to achieve required corrosion resistance and surface roughness specifications.
- Dimensional & Surface Inspection: Every coil undergoes 100% inspection for OD, WT, straightness, surface defects, and coil geometry.
- Non-Destructive Testing: Eddy current (EC) testing, hydrostatic pressure testing, and visual inspection confirm bore integrity and wall soundness.
- Packaging & Coil Protection: Coils are wrapped in protective film, secured with steel strapping, and packed on wooden pallets or in export-grade containers with moisture-absorbing desiccants.
Applications
Wenzhou Jixing stainless steel coil tube for rotary pay-off reel systems is deployed across a broad spectrum of industries where continuous, joint-free tubing is essential:
- HVAC & Refrigeration: Chilled water lines, condenser tubes, and refrigerant piping in commercial and industrial HVAC systems.
- Pharmaceutical & Biotechnology: Process piping, sanitary CIP/SIP lines, and clean-in-place systems requiring electropolished, low-particle-transfer tubing.
- Food & Beverage Processing: Hygienic process lines, dairy, brewing, and beverage transfer systems compliant with FDA and 3-A standards.
- Chemical Processing: Corrosive chemical transfer, reactor feed lines, and instrument tubing where 316L or duplex grades are required.
- Power Generation: Feedwater systems, condensate extraction, and steam lines in power plant installations.
- Automotive & Aerospace: Fuel lines, hydraulic circuits, and sensor tubing requiring high-cycle fatigue resistance.
- Building & Construction: Domestic water supply, gas piping, and structural decorative applications.
- Medical Equipment: Gas delivery lines, endoscope channels, and implant-grade tubing systems.
Installation & Handling Guidelines
Proper handling of coil tube is critical to maintaining product integrity and ensuring successful installation. The following guidelines are mandatory:
WARNING — GROUND DRAGGING IS STRICTLY PROHIBITED. Dragging coil tube across the ground causes surface abrasion, indentation, and progressive wall thinning. Any tube section exhibiting kinking (sharp local deformation or folding of the tube wall) is considered irreversibly damaged and must be scrapped. Kinked sections cannot be straightened without compromising wall thickness, metallurgical properties, and leak-tightness.
- Coil Placement: The coil must be placed flat on the rotary pay-off reel platform with the coil axis aligned parallel to the reel rotation axis.
- Lead-Out Routing: The tube lead-out should follow a smooth, supported path with a minimum bending radius of 5× the tube OD to prevent bending-induced ovality or kinking.
- Tension Control: The pay-off reel's rotational speed must be synchronized with the downstream pull speed to maintain constant, low feed tension. Excessive tension causes ovality; insufficient tension causes coil stacking and snaking.
- Support Spacing: Intermediate tube supports should be spaced at intervals not exceeding 3× the tube OD to prevent sag-induced deformation.
- End Protection: Tube ends must be capped or plugged during uncoiling and storage to prevent contamination, moisture ingress, and mechanical damage to the bore.
- Transport: Coils must be transported upright on dedicated coil carriers or flatbed vehicles with adequate securing. Tipping or rolling of coils during transport is prohibited.
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management system and product certification portfolio:
- ISO 9001:2015 — Quality Management System Certification
- ISO 14001:2015 — Environmental Management System Certification
- ISO 45001:2018 — Occupational Health & Safety Management System
- EN 10204 Type 3.1 — Third-Party Material Test Certification for each production lot
- ASTM / ASME Compliance — Product specifications aligned with ASTM A269, A270, and ASME B36.19M
- CE Marking — European Conformity for relevant product categories
- 3-A Sanitary Standards — Available for food-grade electropolished tubing
- Mill Test Reports (MTR): Full chemical analysis, mechanical properties, and heat number traceability provided with every shipment
Why Choose Wenzhou Jixing?
- Specialized Coil Engineering: Decades of experience in coil tube winding, dimensional control, and pay-off reel compatibility optimization.
- End-to-End Supply: From raw material sourcing through coil winding, cold drawing, surface treatment, and final packaging — all under one roof.
- Custom Fabrication: Non-standard OD, WT, coil diameter, length, and surface finish configurations available to match specific pay-off reel dimensions and application requirements.
- Global Export Capability: Products shipped worldwide with full export documentation, customs compliance, and international logistics support.
- Technical Support: Dedicated engineering team provides pay-off reel selection guidance, installation protocol development, and on-site technical consultation.