Stainless Steel Coil Tube – Domestic Second-Tier Industrial Supply
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd supplies high-quality stainless steel coil tube sourced from China's leading domestic second-tier manufacturers, including Jiuli (久立), Wujin (武进), Huaxin Lihua (华新丽华), and Yongxing (永兴). These established producers collectively represent the backbone of China's industrial stainless steel tubing sector, delivering dependable performance at competitive prices.
Positioned as the industrial workhorse of the domestic stainless steel coil tube market, this product line offers an exceptional balance of mechanical performance, corrosion resistance, and cost-efficiency. It meets or exceeds the entry requirements of the majority of industrial sectors, making it the preferred choice for high-volume manufacturing, infrastructure projects, and general industrial applications where proven quality and supply continuity are paramount.
Material & Properties
Coil tubes are manufactured from austenitic and duplex stainless steel grades, providing excellent corrosion resistance, formability, and weldability. Typical grades include:
- 304 / 304L (UNS S30400 / S30403) – General-purpose corrosion resistance; excellent formability
- 316 / 316L (UNS S31600 / S31603) – Enhanced chloride and pitting resistance
- 321 (UNS S32100) – Stabilized for high-temperature service
- SUS304J1 / SUS316L – Japanese-standard equivalents with equivalent performance
- 2205 Duplex (UNS S31803) – Higher strength with superior chloride resistance
Key material properties include a tensile strength range of 515–750 MPa (75–109 ksi), elongation of ≥35% (austenitic grades), and a maximum service temperature of up to 870°C (1,598°F) depending on grade selection.
Specifications
| Parameter | Specification |
|---|---|
| Outer Diameter (OD) | 6.0 – 219.1 mm (0.236" – 8.626") |
| Wall Thickness | 0.5 – 12.7 mm (0.020" – 0.500") |
| Coil Length (per coil) | Up to 1,000 m (3,281 ft) or custom lengths |
| Surface Finish | No. 1, 2B, BA, No. 4, Hairline, Matte |
| Tolerance (OD) | ±0.05 mm – ±0.15 mm (±0.002" – ±0.006") |
| Tolerance (Wall) | ±10% of nominal thickness |
| Standards | ASTM A213/A269, EN 10216-5, GB/T 12771, JIS G3459 |
| Grade Options | 304, 304L, 316, 316L, 321, 310S, 2205, 904L |
| End Condition | Plain ends, beveled ends, or welded ends (upon request) |
| Packaging | Steel core coil with protective wrapping; seaworthy export packing available |
Manufacturing Process
The coil tube manufacturing process employed by second-tier domestic producers follows a rigorous multi-stage workflow:
- Raw Material Preparation – Virgin or certified recycled stainless steel ingots are melted in EAF/VOD or AOD furnaces to achieve precise chemical composition and ultra-low sulfur/phosphorus levels.
- Hot Rolling & Annealing – Continuous hot rolling produces seamless tube blanks with controlled dimensional tolerances, followed by solution annealing to achieve the desired austenitic microstructure.
- Cold Drawing / Cold Reduction – Tubes are cold-worked through precision dies to achieve final OD and wall thickness specifications with tight tolerances and superior surface finish.
- Pickling & Passivation – Tubes undergo acid pickling to remove scale and oxide layers, followed by passivation treatment to restore the protective chromium oxide film.
- Coiling & Straightening – Finished tubes are wound onto steel cores at controlled tensions to prevent deformation, then inspected for dimensional accuracy and surface quality.
- Quality Inspection – Every coil undergoes hydrostatic testing, ultrasonic flaw detection (UT), eddy current testing (ECT), and visual surface examination.
Applications
Stainless steel coil tubes from this tier serve a broad spectrum of industrial applications:
- Petrochemical & Oil/Gas – Heat exchanger tubes, process piping, condensate lines
- Food & Beverage Processing – Hygienic process lines, CIP systems, dairy and brewing equipment
- Pharmaceutical & Medical – Cleanroom piping, sterilization equipment, instrument tubing
- Power Generation – Boiler tubes, superheater elements, condenser tubes
- Chemical Processing – Reactor internals, acid handling systems, corrosion-resistant piping
- Automotive & Aerospace – Exhaust systems, fuel lines, hydraulic components
- Construction & Architecture – Structural elements, decorative handrails, building facades
- Marine & Offshore – Seawater piping, desalination plants, shipbuilding components
Quality Certifications
Products are manufactured under internationally recognized quality management systems and carry the following certifications:
- ISO 9001:2015 – Quality Management System
- ISO 14001 – Environmental Management System
- ISO 45001 – Occupational Health & Safety Management
- EN 10204 3.1 – Material Test Certificate (MTC) with third-party inspection
- API 5L / API 5CT – For oil and gas sector applications
- PED 2014/68/EU – Pressure Equipment Directive compliance (where applicable)
- NORSOK M-650 – For offshore and marine applications
- GB/T 19001 – Chinese national quality management standard
Unique Selling Points
Industrial-Grade Value with Proven Supply Reliability
- Strategic Sourcing from Tier-2 Leaders – Direct partnerships with Jiuli, Wujin, Huaxin Lihua, and Yongxing ensure access to China's most reliable domestic stainless steel coil tube manufacturers, with combined annual capacity exceeding millions of metric tons.
- Exceptional Cost-Performance Ratio – Achieves 90–95% of the performance of premium (Tier-1) imports at 20–35% lower cost, making it the optimal choice for high-volume industrial procurement.
- Broad Industry Acceptance – Meets admission standards for the majority of regulated industries including food, pharmaceutical, petrochemical, and power generation – eliminating the need for costly alternative sourcing.
- Flexible Supply Chain – Coil format enables downstream customers to cut-to-length on demand, minimizing waste and optimizing inventory management.
- Scalable Volume Capability – Second-tier domestic manufacturers maintain large production runs with short lead times, supporting both small-batch customization and large-scale industrial projects.
- Full Traceability – Every coil is accompanied by mill test certificates with full heat-number traceability, chemical analysis, and mechanical test results.
By leveraging Wenzhou Jixing Metal Materials Co., Ltd as your procurement partner for domestic second-tier stainless steel coil tube, you gain access to a robust, cost-efficient supply chain backed by China's most experienced and capable domestic tube manufacturers – delivering the reliability of industrial-grade quality at a price point that supports competitive project economics.