Stainless Steel Coil Tube – Compressor Exhaust Coil Tube (Model No. 301)

Product Overview

The Stainless Steel Coil Tube (Model No. 301) manufactured by Wenzhou Jixing Metal Materials Co., Ltd. is a precision-engineered coiled tubing product designed primarily for compressor exhaust systems and high-performance thermal management applications. This product is specifically engineered to address the critical relationship between exhaust coil tube structural design and overall system noise levels, as documented in the technical study "Influence of Compressor Internal Exhaust Coil Tube Structure on Overall Noise".

Unlike conventional straight tubing or loosely formed coils, this product incorporates optimized geometric configurations—including controlled coil pitch, winding tightness, and transition radii—that minimize aerodynamic turbulence and acoustic resonance within compressor exhaust pathways. The result is a significant reduction in broadband noise generation while maintaining structural integrity under high-pressure and high-temperature operating conditions.

Material & Properties

The coil tube is fabricated from high-grade austenitic stainless steel, selected for its superior combination of corrosion resistance, mechanical strength, thermal stability, and formability during the coiling process.

Technical Specifications

Parameter Specification
Product Model Coil Tube No. 301
Product Type Coiled Tubing (Coiltube)
Material Grade Austenitic Stainless Steel (SUS304 / SUS316L / Custom)
Outer Diameter (OD) Customizable (typically 6–50 mm)
Wall Thickness 0.5–3.0 mm (configurable per application)
Coil Diameter Standardized or custom winding diameter
Coil Pitch / Winding Spacing Optimized for noise reduction (precision-controlled)
Tolerance ±0.05 mm (OD); ±0.02 mm (wall thickness)
Surface Finish 2B / BA / Custom (Ra ≤ 0.8 μm available)
Operating Temperature Range -40°C to +600°C
Operating Pressure Up to 40 MPa (depending on configuration)
Standards Compliance ASTM A269 / ASTM A270 / EN 10217-7 / GB/T 12771
Applicable Industry Compressor Systems, HVAC, Refrigeration, Power Generation

Manufacturing Process

The production of the Model No. 301 Coil Tube follows a rigorous multi-stage manufacturing workflow to ensure dimensional accuracy, acoustic performance, and structural reliability:

  1. Raw Material Selection & Inspection: Certified stainless steel strip or seamless tube stock is sourced from approved suppliers and subjected to spectroscopic analysis, dimensional verification, and surface quality inspection.
  2. Slitting & Forming: Strip material is precision-slitted to exact width specifications, then formed into tubular cross-sections using roll-forming or seamless tube drawing techniques.
  3. Welding (if applicable): Longitudinal weld seams are produced via TIG (Tungsten Inert Gas) welding or laser welding, followed by internal and external weld bead grinding to achieve smooth flow surfaces.
  4. Precision Coiling: The formed tube is wound into coil configurations using CNC-controlled coiling machinery. Coil pitch, winding tension, and transition curves are parameterized based on acoustic optimization data derived from the referenced technical study.
  5. Heat Treatment: Solution annealing is performed to relieve residual stresses introduced during forming and coiling, restoring full austenitic microstructure and mechanical properties.
  6. Surface Treatment: Pickling and passivation are applied to remove mill scale and form a protective chromium oxide layer, ensuring long-term corrosion resistance.
  7. Final Quality Inspection: Each batch undergoes dimensional measurement, hydrostatic pressure testing, spectroscopic composition verification, and acoustic performance evaluation.

Applications

The Model No. 301 Stainless Steel Coil Tube is deployed across a wide spectrum of industrial and commercial applications where noise reduction, durability, and thermal performance are critical:

Quality Certifications & Standards

Wenzhou Jixing Metal Materials Co., Ltd. maintains comprehensive quality management systems and certifications to ensure consistent product performance:

Unique Selling Points

Acoustic Optimization: Unlike standard coil tubes, the Model No. 301 incorporates data-driven structural parameters—coil pitch, winding geometry, and transition radii—derived from rigorous acoustic research on compressor exhaust noise reduction. This provides a measurable decibel reduction advantage over conventional alternatives.