Stainless Steel Coil Tube – Per-Meter Retail Pricing for Custom-Length Orders
Product Overview
The Stainless Steel Coil Tube (Product Code: 187) from Wenzhou Jixing Metal Materials Co., Ltd is a high-quality, continuous-coil stainless steel tubing product designed for versatile industrial and commercial applications. Unlike conventional fixed-length tube sales, this product is offered under a per-meter pricing model (CNY/meter), which includes the allocation of cutting losses, making it an ideal solution for small-batch, custom-length retail orders where flexibility and cost efficiency are paramount.
This pricing structure eliminates the need for customers to purchase full coils or standard-length bars, reducing material waste and minimizing inventory overhead. The per-meter model ensures that buyers pay only for the exact length required, with cutting losses transparently factored into the unit price—providing complete cost predictability for project-specific procurement.
Unique Selling Points
- Per-Meter Pricing (CNY/meter): Transparent pricing that includes cutting loss allocation, eliminating hidden costs and enabling precise budget planning for custom-length requirements.
- Small-Batch Friendly: Specifically designed for retail and small-volume orders where full-coil purchases are impractical or economically inefficient.
- Custom-Length Flexibility: Customers can specify exact tube lengths tailored to their application, reducing post-purchase processing time and material waste.
- Coil-Form Supply Advantage: Continuous coil format enables rapid, automated cutting to any required length, ensuring minimal lead times even for bespoke orders.
- Comprehensive Cost Structure: The all-inclusive per-meter rate (material + cutting loss) simplifies procurement by removing the need for separate loss calculations or surcharges.
Material & Properties
Stainless Steel Coil Tubes from Wenzhou Jixing are manufactured from premium-grade austenitic and duplex stainless steel alloys, offering exceptional corrosion resistance, mechanical strength, and thermal stability. The primary grades available include:
- SUS304 / AISI 304: General-purpose alloy with excellent formability and corrosion resistance; suitable for food-grade, chemical, and architectural applications.
- SUS316 / AISI 316: Enhanced molybdenum content provides superior resistance to chlorides and acidic environments; ideal for marine and pharmaceutical uses.
- SUS304L / AISI 304L: Low-carbon variant offering improved weldability and resistance to intergranular corrosion.
- SUS321 / AISI 321: Titanium-stabilized grade with outstanding resistance to thermal cracking and high-temperature oxidation.
- Duplex 2205: High-strength duplex alloy providing exceptional resistance to chloride stress corrosion cracking and elevated yield strength.
Key Mechanical Properties (Typical Values for Grade 304)
- Tensile Strength: ≥ 520 MPa (≥ 75,400 psi)
- Yield Strength: ≥ 205 MPa (≥ 29,700 psi)
- Elongation: ≥ 40%
- Hardness: ≤ 92 HRB
- Operating Temperature Range: -196°C to +870°C (-321°F to +1,598°F)
- Corrosion Resistance: Excellent resistance to atmospheric, aqueous, and mild chemical environments
Specifications
| Parameter | Specification / Range |
|---|---|
| Product Name | Stainless Steel Coil Tube (盘管 / Coil Tube) |
| Product Code | 187 |
| Material Grades | SUS304, 304L, 316, 316L, 321, 310S, 2205 Duplex |
| Outer Diameter (OD) | Φ 1.0 mm – Φ 50.8 mm (0.039 in – 2.000 in) |
| Wall Thickness | 0.10 mm – 3.00 mm (0.004 in – 0.118 in) |
| Coil Length (Continuous) | 50 m – 500 m (164 ft – 1,640 ft) per coil |
| Custom Cut Length | Available upon request; minimum 0.1 m (3.9 in) |
| Surface Finish | Bright Annealed (BA), Pickled & Passivated, 2B, Mirror (No. 4 / 8K) |
| Tolerance (OD) | ± 0.05 mm (± 0.002 in) for OD ≤ 6 mm; ± 0.10 mm for larger diameters |
| Tolerance (Wall Thickness) | ± 10% of nominal thickness |
| Coil Weight | 50 kg – 2,000 kg (110 lb – 4,409 lb) depending on specification |
| Pricing Model | Per-Meter Pricing (CNY/meter), inclusive of cutting loss allocation |
| Order Minimum | No minimum coil quantity; small-batch and single-piece orders accepted |
| Packaging | Wooden pallet, plastic wrapping, or export-grade packaging as required |
| Standard | ASTM A511, ASTM A213, EN 10217-7, GB/T 14976 |
Manufacturing Process
The production of Stainless Steel Coil Tubes at Wenzhou Jixing Metal Materials Co., Ltd follows a rigorous, multi-stage manufacturing 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 and subjected to incoming inspection for chemical composition (via spectroscopic analysis) and mechanical properties.
- Coil Winding & Forming: The strip is precision-wound into a continuous coil and fed through a series of progressive rollers in a coil tube forming machine. Cold-rolling and forming processes shape the strip into a tubular cross-section with tight dimensional tolerances.
- Welding (for welded coil tubes): A high-frequency induction welding process is employed to create a uniform, leak-tight weld seam. The weld zone is subsequently ground and smoothed to minimize internal protrusion.
- Heat Treatment / Annealing: Continuous annealing in a controlled atmosphere furnace relieves internal stresses, restores ductility, and achieves the desired microstructure. Bright annealing is performed under a reducing atmosphere to maintain a clean, oxide-free surface.
- Pickling & Passivation: Tubes are treated with acid solutions to remove surface scale and oxidation, followed by passivation to form a protective chromium oxide layer, enhancing corrosion resistance.
- Surface Finishing: Optional polishing, brushing, or mirror finishing is applied to meet specific surface quality requirements (2B, BA, No. 4, 8K).
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Quality Inspection: Every coil undergoes 100% inspection including:
- Dimensional verification (OD, wall thickness, straightness) using laser measurement systems
- Visual inspection for surface defects, weld integrity, and coating uniformity
- Pressure testing or helium leak testing for weld seam integrity
- Chemical composition verification via OES (Optical Emission Spectroscopy)
- Custom-Length Cutting: For per-meter retail orders, coils are fed into automated precision cutting machines that trim tubes to the exact customer-specified length. Cutting loss is calculated and factored into the per-meter price, ensuring transparent and accurate billing.
- Packaging & Dispatch: Tubes are bundled, wrapped, and packaged according to order specifications, with full traceability documentation including mill test certificates (MTC).
Applications
Stainless Steel Coil Tubes are widely utilized across diverse industries due to their combination of corrosion resistance, mechanical strength, hygienic properties, and formability. Key application areas include:
- Heat Exchangers & Cooling Systems: Coil tubes are ideal for compact heat exchanger designs, radiators, condensers, and evaporators in HVAC, automotive, and industrial thermal management systems.
- Food & Beverage Processing: Used in pasteurization lines, brewing equipment, dairy processing, and sanitary fluid transfer systems where hygienic standards (FDA/3-A compliant) are required.
- Chemical & Petrochemical Industry: Resistant to aggressive chemical environments, suitable for process piping, reactor coils, and chemical transfer lines.
- Pharmaceutical & Medical Devices: Employed in medical gas delivery systems, pharmaceutical manufacturing equipment, and sterile fluid handling applications.
- Automotive & Transportation: Used in fuel lines, brake lines, turbocharger cooling circuits, and exhaust system components.
- Construction & Architecture: Applied in structural supports, handrails, decorative elements, and building services piping.
- Electronics & Sensors: Precision-diameter coil tubes serve as housings for thermocouples, pressure sensors, and gas detection probes.
- Solar Energy Systems: Utilized in solar water heater collectors and evacuated tube solar panel structures.
- Furniture & Decorative Applications: Aesthetic and durable coil tubes for modern furniture frames, shelving, and interior design elements.
Quality Certifications
Wenzhou Jixing Metal Materials Co., Ltd maintains a comprehensive quality management framework and holds the following certifications to ensure product reliability and international compliance:
- ISO 9001:2015 – Quality Management System certification ensuring consistent product quality and process control.
- ISO 14001:2015 – Environmental Management System certification demonstrating commitment to sustainable manufacturing practices.
- ISO 45001:2018 – Occupational Health and Safety Management System certification.
- CE Marking – Compliance with European health, safety, and environmental protection standards.
- EN 10204 3.1 – Mill Test Certificate (MTC) provided with every shipment, documenting chemical composition and mechanical test results.
- ASTM / ASME Compliance – Products manufactured and tested in accordance with ASTM A511, ASTM A213, and relevant ASME codes.
- GB/T National Standards (China) – Full compliance with Chinese national standards for stainless steel tubes and pipes.
- PED 2014/68/EU – Pressure Equipment Directive compliance for pressure-rated applications.
Pricing & Ordering Information
Pricing Model: CNY per meter (元/米), inclusive of cutting loss allocation (含切割损耗分摊).
Applicability: This pricing structure is specifically designed for small-batch, custom-length retail orders (小批量、定尺零售订单适用).
The per-meter pricing model represents a significant advantage for buyers requiring small quantities of stainless steel tubing at precise, project-specific lengths. By incorporating cutting loss directly into the unit price, Wenzhou Jixing eliminates the complexity of calculating material waste, provides complete cost transparency, and enables customers to procure exactly what they need—without committing to full-coil purchases. This approach is particularly beneficial for prototype development, maintenance and repair operations, custom fabrication, and small-scale manufacturing projects where flexibility and cost-efficiency are critical decision factors.
For detailed quotations, technical support, and order placement, please contact Wenzhou Jixing Metal Materials Co., Ltd with your specific material grade, dimensions, surface finish requirements, and desired tube lengths.