Stainless Steel Coil Tube — External Ice-Melting Heat Extraction System

Product Overview

The Stainless Steel Coil Tube (Coil Tube) is a precision-engineered tubular component manufactured by Wenzhou Jixing Metal Materials Co., Ltd, specifically designed for external ice-melting tank systems and heat extraction applications. This product has been validated through rigorous experimental research on the ice-melting process of external ice-melting tanks, with particular emphasis on heat extraction characteristics. The coil tube geometry provides a significantly increased surface-area-to-volume ratio, enabling superior thermal transfer efficiency in cryogenic and refrigeration environments where rapid and uniform ice melting is required.

Unlike conventional straight-pipe heat exchangers, the coiled configuration of this tube allows for compact installation within confined spaces while maintaining optimal fluid dynamics and thermal performance. The product is particularly suited for applications involving phase-change heat transfer, where the latent heat of fusion must be efficiently absorbed to melt ice or frozen materials in industrial and commercial settings.

Material & Properties

The coil tube is fabricated from high-grade austenitic stainless steel, ensuring exceptional corrosion resistance, mechanical strength, and thermal conductivity suitable for demanding thermal cycling environments.

Specifications

Parameter Specification / Range Standard Reference
Outer Diameter (OD) 6 mm – 50 mm (customizable) ASTM A213 / ASME SA-213
Wall Thickness 0.5 mm – 4.0 mm ASTM A213 / GB/T 12771
Coil Diameter 100 mm – 500 mm Manufacturer specification
Coil Length (Uncoiled) 1 m – 100 m (standard); up to 500 m on request —
Number of Turns 5 – 200 turns (configurable) —
End Preparation Flat cut, beveled (45°), or pre-welded fittings ASME B16.9
Tolerance on OD ±0.1 mm (precision grade) ISO 1128
Tolerance on Wall Thickness ±10% of nominal ASTM A213
Maximum Working Pressure Up to 16 MPa (depending on dimensions) PV = π·d·t·S
Surface Roughness Ra 0.8 – 1.6 μm (standard); Ra ≤ 0.4 μm (electropolished) ISO 1302
Applicable Fluids Water, glycol solutions, brine, refrigerants, process fluids —

Manufacturing Process

The production of the stainless steel coil tube follows a multi-stage manufacturing workflow to ensure dimensional accuracy, mechanical integrity, and surface quality:

  1. Material Selection & Inspection: Certified stainless steel seamless or welded tubes are procured from approved mills. Incoming material undergoes spectroscopic analysis (PMI), visual inspection, and dimensional verification.
  2. Cutting & End Preparation: Tubes are cut to required lengths using precision plasma or laser cutting systems. Ends are deburred, chamfered, and prepared for coil forming.
  3. Coil Forming: Using CNC-controlled coil bending machinery, the tube is formed into the specified coil geometry with controlled bending radii to prevent wall thinning, ovality, or kinking. The bending process maintains a minimum bend radius of 3× OD to preserve structural integrity.
  4. Welding (if applicable): Multi-turn coils requiring continuous tubing are joined via orbital TIG welding with argon gas back-purging to prevent internal oxidation.
  5. Heat Treatment & Stress Relief: Where required, a solution annealing treatment is performed at 1050°C – 1150°C followed by rapid quenching to restore full austenitic structure and eliminate residual stresses from forming.
  6. Surface Treatment: Passivation via nitric acid or citric acid immersion to remove free iron contamination and enhance passive film formation. Electropolishing is available for critical applications requiring ultra-low surface roughness.
  7. Quality Control & Testing: Each batch undergoes hydrostatic pressure testing, eddy current inspection, dimensional measurement, and surface profile verification per applicable standards.
  8. Packaging & Dispatch: Coils are individually wrapped in protective polyethylene film, secured with steel strapping, and packaged in export-grade wooden crates or pallets.

Applications

The stainless steel coil tube is employed across a diverse range of thermal management and process engineering applications:

Quality Certifications & Standards Compliance

Wenzhou Jixing Metal Materials Co., Ltd maintains a comprehensive quality management framework to ensure product conformity with international standards:

Unique Selling Points

Note: All specifications are indicative and subject to final confirmation based on agreed-upon project requirements. Custom engineering solutions are available upon request. For detailed technical data sheets, material certificates, and application-specific design support, please contact Wenzhou Jixing Metal Materials Co., Ltd directly.