Stainless Steel Coil Tube — Whole Roll Pricing (Stock Clearance & Tail Coil)
Wenzhou Jixing Metal Materials Co., Ltd. offers premium-grade stainless steel coil tubes supplied on a whole-roll, single-price basis. This pricing structure ensures maximum cost efficiency for buyers who require bulk quantities of coiled tubing, and is the industry-standard approach for stock clearance, tail-end coil processing, and high-volume procurement programs.
Product Overview
Stainless steel coil tubes are continuously formed, cold-drawn or seamless tubing products wound into large-diameter coils for compact storage, efficient logistics, and rapid downstream processing. Unlike cut-length tubing, coil tubes eliminate end-joint waste, minimize handling damage, and allow downstream fabricators to cut to exact specifications on demand.
Wenzhou Jixing Metal Materials supplies coil tubes under a whole-roll pricing model — each roll is quoted at a single, non-negotiable unit price with no splitting or partial-roll sales. This approach is most commonly applied to:
- Stock clearance inventory — surplus or aged stock offered at competitive rates to optimize warehouse turnover
- Tail-end coils — remaining material from production runs that are sold as complete rolls to maximize utilization
- High-volume procurement — bulk buyers who benefit from the lowest per-meter cost achievable through whole-roll purchase
Material & Properties
Coil tubes are manufactured from high-quality austenitic and duplex stainless steel grades, selected to meet the mechanical, corrosion resistance, and formability demands of diverse industrial applications.
Commonly Available Grades
- 304 / 304L — General-purpose corrosion resistance; excellent formability; ideal for food processing, chemical, and architectural applications
- 316 / 316L — Superior chloride and pitting resistance; preferred for marine, pharmaceutical, and aggressive chemical environments
- 321 — Stabilized with titanium; high-temperature strength up to 870°C; suited for heat exchangers and furnace components
- 310S — Exceptional oxidation resistance up to 1150°C; designed for extreme-temperature service
- 430 — Ferritic grade with good atmospheric corrosion resistance and magnetic properties
Key Material Properties
- Non-magnetic (austenitic grades) or weakly magnetic (ferritic grades)
- Excellent resistance to oxidation, pitting, and crevice corrosion
- High strength-to-weight ratio with good cold-workability
- Hygienic, non-toxic surface suitable for food-grade and medical applications
- Full recyclability with no loss of material properties
Specifications
| Parameter | Range / Options |
|---|---|
| Outer Diameter (OD) | 3.0 mm – 168.3 mm (custom sizes available upon request) |
| Wall Thickness | 0.3 mm – 12.0 mm |
| Coil Inner Diameter | 200 mm – 500 mm (standard); adjustable per customer requirement |
| Coil Weight | Typically 500 kg – 2,000 kg per roll |
| Tolerance (OD) | ±0.05 mm (precision); ±0.1 mm (standard) |
| Tolerance (Wall) | ±10% (standard); ±5% (precision) |
| Surface Finish | 2B, No. 1, BA (Bright Annealed), Pickled & Passivated, Custom |
| Standard | ASTM A269, ASTM A312, ASME SA-213, EN 10217, GB/T 12771 |
| Pricing Model | Whole-roll, single-price — no splitting or partial-roll sales |
| Supply Condition | Stock clearance / Tail-end coil inventory |
Manufacturing Process
Coil tubes at Wenzhou Jixing Metal Materials are produced through a rigorous, multi-stage manufacturing sequence that ensures dimensional accuracy, metallurgical integrity, and consistent surface quality:
- Raw Material Selection: High-purity stainless steel strip or seamless tube stock is sourced from certified mills with full material traceability (MTR — Mill Test Reports).
- Coil Forming / Cold Drawing: For welded coil tubes, precision strip is roll-formed into a tubular shape and continuously TIG-welded. For seamless coil tubes, billets are pierced and cold-drawn through progressively reducing dies.
- Heat Treatment: Solution annealing (austenitic grades) or stress-relief annealing is performed to eliminate residual stresses, restore full corrosion resistance, and achieve the required mechanical properties.
- Surface Treatment: Pickling and passivation removes scale and impurities, forming a protective chromium oxide layer. Additional finishing (BA, polishing) is applied as specified.
- Coiling: The finished tube is wound into a controlled-diameter coil with proper layer alignment to prevent deformation during storage and transport.
- Quality Inspection: Each roll undergoes dimensional verification, hydrostatic or eddy-current testing, surface inspection, and chemical/spectral analysis before release.
- Packaging: Coils are wrapped in moisture-proof material, strapped with steel bands, and secured on pallets or wooden bases for safe transit.
Applications
Stainless steel coil tubes are versatile components used across a wide spectrum of industries:
- Heat Exchangers & Boilers: Coil tubes for shell-and-tube heat exchangers, condensers, evaporators, and reboilers in power generation and petrochemical plants
- Food & Beverage Processing: Sanitary-grade tubing for dairy, brewing, and pharmaceutical processing lines requiring hygienic, corrosion-resistant piping
- Chemical Processing: Reactor internals, heat exchanger coils, and piping systems handling aggressive acids, alkalis, and chlorides
- Automotive: Exhaust system components, fuel lines, and structural tubing where high-temperature resistance and corrosion protection are critical
- Construction & Architecture: Structural tubing, handrails, decorative elements, and curtain wall systems
- Medical & Laboratory: Surgical instrument tubing, equipment frames, and cleanroom-compatible piping
- Marine & Offshore: Propeller shafts, hull structural tubing, and offshore platform components exposed to saltwater environments
- Aerospace: Fuel lines, hydraulic systems, and structural tubing requiring high strength and oxidation resistance
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials maintains a comprehensive quality management framework to ensure every coil tube roll meets international standards:
- ISO 9001:2015 — Quality Management System certification covering all manufacturing and supply processes
- ISO 14001 — Environmental Management System ensuring sustainable, eco-responsible production
- Mill Test Reports (MTR) — Full chemical composition and mechanical property documentation provided with every shipment
- Third-Party Inspection — Available upon request (SGS, Bureau Veritas, Lloyd's Register)
- Compliance with: ASTM, ASME, EN, and GB standards as specified by the customer
Unique Selling Points
- Competitive Whole-Roll Pricing: The whole-roll, single-price model delivers the lowest per-meter cost in the market — ideal for budget-conscious bulk buyers, stock clearance programs, and tail-coil utilization
- Zero Splitting Guarantee: Each roll is sold as a complete unit, ensuring consistent material quality throughout the entire coil with no risk of mixed-lot contamination
- Wide Grade & Size Availability: Extensive inventory across multiple stainless steel grades and dimensions, enabling rapid fulfillment of diverse project requirements
- Full Traceability: Every coil is accompanied by complete mill documentation, lot numbers, and inspection records for full supply-chain accountability
- Flexible Logistics: Efficient coil packaging and shipping solutions accommodate standard and oversized coils, minimizing transit damage and delivery lead times
- Technical Support: Dedicated engineering team available for material selection guidance, specification matching, and application-specific recommendations
Note: Under the whole-roll pricing model, individual rolls cannot be split or partially sold. Buyers must commit to the full roll quantity. This pricing structure is most advantageous for stock clearance inventory and tail-end coil lots, where competitive rates are offered to optimize warehouse turnover and material utilization. For custom specifications or partial-quantity requirements, please contact Wenzhou Jixing Metal Materials directly for tailored quotations.