Stainless Steel Evaporative Cooling Coil Tube — Product Technical Specification

1. Product Overview

The Stainless Steel Evaporative Cooling Coil Tube (hereinafter referred to as "Coiltube") is a precision-engineered continuous tube product manufactured by Wenzhou Jixing Metal Materials Co., Ltd. This product is specifically designed for evaporative cooling systems, where uniform water distribution and efficient heat exchange are critical performance parameters. The coil tube is supplied in continuous coil form, enabling seamless integration into evaporative cooling units, air handling systems, and industrial heat management infrastructure.

Based on extensive research into the influence of different air-water arrangement configurations on water distribution uniformity in evaporative cooling coil tubes, this product has been optimized to deliver superior hydraulic balance and thermal transfer efficiency. The design addresses the critical challenge of achieving consistent water film distribution across the tube surface, which directly impacts the overall cooling capacity and energy consumption of the system.

2. Material & Properties

The coil tube is fabricated from high-grade austenitic stainless steel, selected for its exceptional corrosion resistance, thermal conductivity, and mechanical durability in evaporative cooling environments.

3. Technical Specifications

Parameter Specification Unit
Outer Diameter (OD) 6.0 / 8.0 / 10.0 / 12.0 / 14.0 / 16.0 mm
Wall Thickness 0.5 / 0.8 / 1.0 / 1.2 / 1.5 mm
Coil Inner Diameter (Coil ID) 300 / 500 / 700 / 1000 mm
Coil Length (per coil) 50 – 500 (customizable) m
Maximum Working Pressure 1.6 – 4.0 MPa
Hydrostatic Test Pressure 2.5 – 6.0 MPa
Tolerance on OD ±0.10 mm
Tolerance on Wall Thickness ±10% —
Surface Roughness (Inner) ≤ 0.4 (electropolished) μm Ra
Surface Roughness (Outer) ≤ 0.8 μm Ra
Recommended Water Velocity 0.5 – 2.0 m/s
Water Distribution Uniformity Index ≥ 0.90 (based on optimized air-water arrangement) —

4. Manufacturing Process

The production of the evaporative cooling coil tube follows a rigorously controlled multi-stage manufacturing process:

  1. Raw Material Procurement: Certified stainless steel strip from approved mills, with full chemical composition and mechanical property verification.
  2. Slitting & Edge Trimming: Precision slitting to target width with burr-free edges to ensure uniform wall thickness in the final tube.
  3. Forming (Roll Forming / Pipe Making): Continuous cold-rolling or hydraulic expansion forming to achieve the target OD and wall thickness with tight dimensional tolerances.
  4. Welding (where applicable): High-frequency induction welding (HFW) or orbital TIG welding for seamless continuity, followed by weld heat-affected zone (HAZ) stabilization.
  5. Heat Treatment: Solution annealing at 1050–1100°C with controlled cooling to restore full austenitic microstructure and eliminate residual stresses.
  6. Surface Treatment: Pickling, passivation, and optional electropolishing to achieve the required surface finish and corrosion resistance.
  7. Coiling: Precision coiling on mandrels to the specified coil inner diameter, with controlled tension to prevent springback and ovality.
  8. Quality Inspection: 100% inline inspection including ultrasonic wall thickness measurement, visual surface inspection, and dimensional gauging.

5. Applications

The Stainless Steel Evaporative Cooling Coil Tube is engineered for the following primary applications:

6. Quality Certifications & Standards Compliance

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

7. Unique Selling Points

Optimized Water Distribution Performance: Informed by research on the influence of different air-water arrangement configurations on evaporative cooling coil tube water distribution uniformity, this product achieves a water distribution uniformity index of ≥ 0.90. This optimization translates directly into improved cooling capacity, reduced water consumption, and lower energy usage in evaporative cooling applications.