Stainless Steel Coil Tube — Wenzhou Jixing Metal Materials Co., Ltd.
Product Overview
The Stainless Steel Coil Tube (Product No. 1027) manufactured by Wenzhou Jixing Metal Materials Co., Ltd. is a precision-engineered cold-formed tubular product supplied in continuous coil configuration. Designed for high-performance industrial applications, this coil tube delivers superior corrosion resistance, mechanical integrity, and dimensional consistency across extended production runs. The product is available in austenitic and duplex stainless steel grades, tailored to meet the demanding requirements of hygienic processing, chemical engineering, and structural assembly sectors.
Material & Properties
Wenzhou Jixing Metal Materials Co., Ltd. offers a comprehensive range of stainless steel coil tubes fabricated from certified alloy compositions. The following material grades are standardly available:
- Austenitic Grades: SUS304 (UNS S30400), SUS304L (UNS S30403), SUS316 (UNS S31600), SUS316L (UNS S31603), SUS321 (UNS S32100), SUS310S (UNS S31008)
- Duplex Grades: SUS31803 (UNS S31803), SUS32205 (UNS S32205)
- Ferritic Grades: SUS409, SUS430, SUS439
- Super-Austenitic Grades: SUS904L (UNS N08904), SUS2205 (UNS S32205)
Key material properties include:
- Corrosion Resistance: Excellent resistance to atmospheric, chemical, and pitting corrosion; particularly notable in chloride-rich environments for 316L and duplex grades
- Mechanical Strength: Tensile strength ranging from 515 MPa (20#) to over 550 MPa (316L), with elongation of 30–40%
- Temperature Capability: Continuous service from cryogenic temperatures (−196°C / −321°F) to 870°C (1,598°F) depending on grade
- Hygienic Surface: Available with electro-polished (Ra ≤ 0.25 μm) or passivated inner and outer surfaces
Specifications
| Parameter | Specification / Range | Standard Reference |
|---|---|---|
| Outer Diameter (OD) | 6.35 mm – 50.8 mm (¼" – 2") | ASTM A269 / ASME SA-269 |
| Wall Thickness | 0.5 mm – 3.0 mm | ASTM A269 / EN 10217 |
| Coil Length | 1,000 m – 6,000 m (continuous) | — |
| Coil Weight | 200 kg – 2,500 kg per coil | — |
| Surface Finish | No. 1, 2B, BA, 2D, Electro-Polished (EP), Passivated | ASTM A480 / ASTM A967 |
| Tolerance (OD) | ±0.05 mm – ±0.15 mm | ASTM A269 |
| Tolerance (Wall Thickness) | ±10% or ±0.03 mm (whichever is greater) | ASTM A269 |
| Heat Treatment | Solution Annealed (1040°C – 1150°C), Water Quenched | ASTM A967 |
| Testing | Hydrostatic, Eddy Current (ET), Spectrographic (PMI) | ASTM A315 / ASTM E165 |
| Coil Packaging | VCI (Vapor Corrosion Inhibitor) wrapped, wooden or steel pallet base | — |
Manufacturing Process
The production of Wenzhou Jixing Metal Materials Co., Ltd.'s stainless steel coil tubes follows a rigorous multi-stage process ensuring consistent quality and dimensional accuracy:
- Raw Material Inspection: Incoming stainless steel strip or wire rod is verified for chemical composition via Optical Emission Spectroscopy (OES) and Positive Material Identification (PMI) testing.
- Strip Preparation: Cold-rolled stainless steel strip is slit to precise width, edge-trimmed, and inspected for surface defects using automated optical scanning systems.
- Pipe Forming: The prepared strip is fed through a precision roll-forming line with calibrated dies, producing a continuous tubular shape with controlled weld seam geometry.
- Welding: Continuous longitudinal welding is performed using High-Frequency Induction (HF) or TIG (Tungsten Inert Gas) welding processes under inert gas shielding (argon or argon-helium mix) to ensure weld integrity and prevent oxidation.
- Solution Annealing & Pickling: The welded tube coil is passed through a continuous annealing furnace at temperatures between 1,040°C and 1,150°C, followed by pickling and passivation to remove scale and restore full corrosion resistance.
- On-Line Testing: Real-time hydrostatic pressure testing (typically 1.5–2.5× working pressure) and Eddy Current (ET) flaw detection are performed to identify internal or external defects.
- Coiling & Packaging: The finished tube is wound onto precision steel coils with controlled tension to prevent deformation, then packaged with VCI protective film and moisture barriers.
Applications
Wenzhou Jixing Metal Materials Co., Ltd.'s stainless steel coil tubes serve a broad spectrum of industrial applications:
- Food & Beverage Processing: Hygienic piping systems, CIP (Clean-In-Place) lines, and sanitary equipment fabrication (304L, 316L grades)
- Pharmaceutical Manufacturing: GMP-compliant process piping, reactor internals, and cleanroom equipment
- Chemical & Petrochemical Industry: Process piping, heat exchanger tubes, and corrosion-resistant structural components (316L, 321, 904L grades)
- HVAC & Refrigeration: Condenser and evaporator coils, refrigerant distribution lines, and air handler coil tubes
- Automotive & Aerospace: Fuel lines, exhaust system components, and structural tubing
- Construction & Architecture: Decorative railings, structural supports, and architectural cladding elements
- Marine & Offshore: Seawater piping, ballast systems, and marine-grade structural components (duplex grades)
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains rigorous quality management systems and holds the following certifications:
- ISO 9001:2015 — Quality Management System
- ISO 14001:2015 — Environmental Management System
- ISO 45001:2018 — Occupational Health & Safety Management
- EN 10204 Type 3.1 — Third-Party Inspection and Test Certification
- Mill Test Reports (MTR) — Provided with every shipment, documenting chemical composition, mechanical properties, and heat treatment records
- Material Compliance: ASTM, ASME, EN, JIS, and GB standards
- Food Contact Approval: FDA 21 CFR compliant (for food-grade applications)
- Pressure Vessel Standards: ASME Section VIII Div. 1 compliance available upon request
Unique Selling Points
- Continuous Coil Supply: Delivered in seamless coil format enabling high-speed downstream fabrication with minimal material waste and reduced labor costs
- Multi-Grade Flexibility: Comprehensive grade range from standard austenitic to high-performance super-austenitic alloys, accommodating diverse environmental and mechanical requirements
- Precision Dimensional Control: Advanced roll-forming and on-line metrology ensure tight tolerances suitable for critical engineering applications
- Integrated Quality Assurance: Full traceability from raw material to finished product with documented spectrographic and mechanical testing at each production stage
- Customization Capability: Non-standard OD, wall thickness, surface finish, and coil configuration available to meet project-specific requirements
- Competitive Lead Times: Efficient production scheduling and inventory management ensuring reliable delivery within industry-leading timeframes
Technical Consultation & Ordering
For detailed material specifications, sample requests, or custom order inquiries, Wenzhou Jixing Metal Materials Co., Ltd. provides dedicated technical support and engineering consultation. Customers are advised to specify the intended service environment, mechanical loading conditions, and applicable code standards to facilitate optimal grade selection and specification confirmation.