Stainless Steel Coil Tube — Wenzhou Jixing Metal Materials Co., Ltd.
Product Overview
The Stainless Steel Coil Tube (Product No. 1556) manufactured by Wenzhou Jixing Metal Materials Co., Ltd. is a continuously formed tubular product supplied in coiled configuration, enabling high-volume downstream processing with minimal material waste. This product is produced using advanced coil tube drawing technology, specifically leveraging the novel coil tube drawing machine system developed and refined through extensive engineering research. The coil tube format offers superior feed efficiency for automated cutting, bending, and forming operations, making it ideal for high-throughput industrial applications.
Wenzhou Jixing Metal Materials Co., Ltd. is a leading manufacturer specializing in stainless steel seamless and welded tubular products, with decades of accumulated expertise in metallurgical processing, coil tube forming technology, and precision dimensional control. The company's coil tube production line integrates state-of-the-art drawing equipment capable of producing uniform wall thickness, consistent outer diameter tolerance, and excellent surface finish quality across extended coil lengths.
Material & Properties
The stainless steel coil tube is manufactured from high-quality austenitic and duplex stainless steel grades, selected to meet international standards for corrosion resistance, mechanical strength, and formability. Key material grades include:
- Austenitic Grades: AISI 304, AISI 316, AISI 316L, AISI 321, AISI 347
- Super Austenitic Grades: AISI 904L, AISI 2205 (Duplex)
- High-Nickel Grades: Alloy 20, Hastelloy C-276
Typical material properties for AISI 304 grade coil tube include:
- Tensile Strength: ≥ 515 MPa (75,000 psi)
- Yield Strength: ≥ 205 MPa (29,750 psi)
- Elongation: ≥ 40% (in 50 mm / 2 in.)
- Hardness: ≤ 92 HRB (Annealed condition)
- Corrosion Resistance: Excellent resistance to atmospheric, chemical, and aqueous environments
- Temperature Range: −196 °C to +870 °C (−321 °F to +1,598 °F)
- Magnetic Susceptibility: Non-magnetic (annealed condition)
Specifications
| Parameter | Specification / Range | Standard Reference |
|---|---|---|
| Product Name | Stainless Steel Coil Tube (盘管) | — |
| Product Number | 1556 | — |
| Outer Diameter (OD) | Φ3.0 mm – Φ168.3 mm (1/8" – 6") | ASTM A213 / ASME SA-213 |
| Wall Thickness | 0.3 mm – 12.7 mm (0.012" – 0.5") | ASTM A213 / ASME SA-213 |
| Coil Length | 10 m – 300 m (33 ft – 984 ft) per coil | Manufacturer specification |
| Coil Weight | 500 kg – 5,000 kg (1,100 lb – 11,000 lb) | Manufacturer specification |
| OD Tolerance | ±0.15 mm (±0.006") | ASTM A213 |
| Wall Thickness Tolerance | ±10% (or ±0.025 mm, whichever is greater) | ASTM A213 |
| Surface Finish | 2B, BA (Bright Annealed), No. 4, Mirror (Ra ≤ 0.4 μm) | ASTM A480 / GB/T 343 |
| End Condition | Plain end, Beveled, or Threaded (as specified) | ASME B1.20.1 |
| Heat Treatment Condition | Annealed (Solution Treated), or Cold Worked (1/4 Hard, 1/2 Hard, Full Hard) | ASTM A213 |
| Manufacturing Method | Piercing → Cold Drawing → Coil Winding (via Novel Coil Tube Drawing Machine) | ISO 11397 / GB/T 14976 |
| Standards Compliance | ASTM A213, ASME SA-213, EN 10216-5, GB/T 12771, JIS G3459 | Multi-standard |
Manufacturing Process
The production of the stainless steel coil tube at Wenzhou Jixing Metal Materials Co., Ltd. follows a rigorously controlled multi-stage manufacturing process, anchored by the company's proprietary Novel Coil Tube Drawing Machine system:
- Raw Material Selection: Certified stainless steel round bars (billet stock) are sourced from approved mills, undergo spectroscopic analysis (PMI verification), and are inspected for mechanical properties and chemical composition compliance.
- Piercing & Preliminary Forming: The solid round bar is heated to piercing temperature and passed through a piercer to produce a hollow tube blank with controlled wall thickness and outer diameter.
- Intermediate Annealing: The pierced tube undergoes solution heat treatment in a controlled atmosphere furnace to relieve cold work stresses and restore full ductility for subsequent drawing operations.
- Cold Drawing through Novel Coil Tube Drawing Machine: The tube blank is fed continuously through the advanced drawing machine system. This novel equipment features:
- Multi-stage progressive die reduction for uniform dimensional control
- Integrated lubrication and cooling system for consistent surface quality
- Real-time dimensional monitoring via laser gauging sensors
- Continuous coil winding mechanism for seamless transition from straight tube to coiled configuration
- Computer Numerical Control (CNC) parameter adjustment for rapid die changeover and production flexibility
- Final Annealing & Pickling: The drawn coil tube undergoes final solution annealing followed by acid pickling and passivation to remove oxide scale, restore chromium-rich passive layer, and achieve the specified surface finish grade.
- Coil Winding & Packaging: The finished tube is wound into coils of specified length and weight, protected with anti-corrosion wrapping, and secured with steel strapping for safe transportation.
- Quality Inspection: Every coil undergoes comprehensive non-destructive testing (NDT), including ultrasonic testing (UT) for wall thickness uniformity, eddy current testing (ECT) for surface defect detection, and hydrostatic pressure testing per ASTM A213 requirements.
Applications
The stainless steel coil tube finds extensive application across multiple industrial sectors due to its combination of corrosion resistance, mechanical integrity, and processing flexibility:
- Automotive Industry: Exhaust system components, fuel delivery lines, brake lines, and structural tubing for lightweight vehicle frames
- Petrochemical & Oil/Gas: Heat exchanger tubes, process piping, distillation columns, and offshore platform tubing systems
- Food & Pharmaceutical Processing: Sanitary-grade tubing for beverage processing, dairy equipment, pharmaceutical fluid transfer, and CIP (Clean-in-Place) systems
- Medical Devices: Surgical instrument tubing, endoscope shafts, catheter housings, and implant manufacturing stock
- Construction & Architecture: Structural railings, decorative handrails, window frames, and building facade elements
- Heat Exchanger Manufacturing: Condenser tubes, evaporator tubes, and boiler tubes for power generation and HVAC systems
- Hydraulic & Pneumatic Systems: Fluid conveyance lines, cylinder tubes, and high-pressure system components
- Aerospace: Fuel lines, hydraulic tubing, and structural support elements in aircraft manufacturing
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management infrastructure ensuring full traceability and regulatory compliance:
- ISO 9001:2015 — Quality Management System Certification
- ISO 14001:2015 — Environmental Management System Certification
- ISO 45001:2018 — Occupational Health and Safety Management System
- EN 10204 — Type 3.1 Inspection Certificate (Mill Test Certificate) provided with every shipment
- ASME "S" Stamp — Authorized Manufacturer for Pressure Vessel Components (where applicable)
- API Monogram — American Petroleum Institute certification for oil and gas industry products
- PED 2014/68/EU — European Pressure Equipment Directive compliance
- NSF/ANSI 61 — Drinking Water System Components certification (for food-grade applications)
- ECRIN / EAC — Eurasian Conformity certification for export to CIS markets
Unique Selling Points
1. Proprietary Novel Coil Tube Drawing Technology: The company's advanced coil tube drawing machine system represents a significant engineering advancement in continuous tube forming, enabling superior dimensional accuracy (OD tolerance ±0.15 mm), reduced material waste (up to 30% savings versus cut-length production), and enhanced surface finish quality through optimized lubrication and die geometry.
2. End-to-End Vertical Integration: From raw material sourcing through final coil packaging, the entire production chain is controlled in-house, ensuring consistent quality, rapid turnaround, and full material traceability from heat number to finished coil.
3. Customization Capability: Flexible production parameters allow customization of outer diameter, wall thickness, surface finish, heat treatment condition, coil dimensions, and end preparation to meet specific customer engineering requirements.
4. Global Standards Compliance: Products manufactured to simultaneously satisfy ASTM, ASME, EN, JIS, and GB standards, facilitating international project acceptance without additional certification barriers.
5. Sustainable Manufacturing: The coil tube format inherently reduces cutting waste and transportation emissions compared to cut-length alternatives, supporting clients' Environmental, Social, and Governance (ESG) objectives.
Technical Support & Documentation
Each shipment of stainless steel coil tube is accompanied by comprehensive documentation including:
- Mill Test Certificate (MTC) per EN 10204 Type 3.1
- Chemical Composition Analysis (full range)
- Mechanical Properties Test Report
- Dimensional Inspection Report
- Non-Destructive Testing (NDT) Certificates
- Hydrostatic Test Records
- Material Traceability Matrix (heat number to coil number)
Wenzhou Jixing Metal Materials Co., Ltd. provides technical consultation, sample evaluation, and application engineering support to assist customers in optimal product selection and specification alignment for their specific industrial requirements.