Stainless Steel Direct Evaporative Ice Coil Tube (Model No. 1105)
Product Overview
The Stainless Steel Direct Evaporative Ice Coil Tube (Model No. 1105) is a precision-engineered refrigeration component manufactured by Wenzhou Jixing Metal Materials Co., Ltd. This coil tube is specifically designed for direct evaporative cooling applications, where refrigerant flows through the coil to transfer heat directly to the surrounding medium or to facilitate ice formation and melting cycles. The product represents an advanced solution in thermal management systems, combining the corrosion resistance and mechanical integrity of stainless steel with optimized heat transfer geometry to achieve superior cooling efficiency in industrial and commercial refrigeration environments.
Material & Properties
The coil tube is fabricated from high-grade austenitic stainless steel, ensuring exceptional performance under demanding refrigeration conditions. The material selection addresses the dual requirements of thermal conductivity and long-term resistance to refrigerant-induced corrosion.
- Primary Alloy: Austenitic stainless steel (typically Grade 304 or 316L), offering excellent resistance to chloride pitting and stress corrosion cracking (Stress Corrosion Cracking, SCC).
- Wall Thickness: Precision-controlled to balance thermal transfer efficiency with structural integrity under refrigerant pressure.
- Surface Finish: Interior surfaces are electropolished or passivated to minimize friction losses and prevent refrigerant film degradation during extended operation.
- Mechanical Properties: Yield strength (Yield Strength) ≥ 205 MPa; tensile strength (Ultimate Tensile Strength, UTS) ≥ 520 MPa; elongation (Elongation at Break) ≥ 40%.
- Thermal Conductivity: Approximately 16–18 W/(m·K) at 20°C, providing reliable heat transfer performance in direct evaporative cycles.
- Operating Temperature Range: −40°C to +150°C, accommodating a wide spectrum of refrigeration and industrial cooling applications.
Specifications
| Parameter | Specification | Unit | Standard / Reference |
|---|---|---|---|
| Product Model | 1105 | — | Manufacturer Catalog |
| Product Category | Coil Tube (盘管) | — | — |
| Material Grade | SS304 / SS316L | — | ASTM A213 / ASTM A269 |
| Outer Diameter (OD) | 6.35 – 25.4 | mm | ASME B36.19M |
| Wall Thickness | 0.5 – 1.5 | mm | — |
| Coil Diameter | 50 – 500 | mm | Custom Configurable |
| Coil Length | 1 – 50 | m | — |
| Working Pressure | ≤ 2.5 | MPa | ASME B31.5 |
| Test Pressure | 3.75 | MPa | 1.5× Working Pressure |
| Refrigerant Compatibility | R404A, R407C, R134a, NH3 | — | ASHRAE Standard 34 |
| Surface Treatment | Electropolished / Passivated | — | ASTM A967 |
| Dimensional Tolerance | ±0.05 (OD); ±0.1 (Coil Diameter) | mm | ISO 286 |
| Delivery Form | Coiled / Cut-to-Length | — | — |
Manufacturing Process
The production of the Model 1105 Direct Evaporative Ice Coil Tube follows a rigorous multi-stage manufacturing protocol to ensure dimensional accuracy, metallurgical homogeneity, and leak-tight integrity:
- Material Selection & Inspection: Raw stainless steel tubing is sourced from certified mills and subjected to spectrographic analysis (Optical Emission Spectrometry, OES) and ultrasonic testing (Ultrasonic Testing, UT) to verify chemical composition and detect internal defects.
- Dimensional Calibration: Tubes undergo cold-drawing or cold-rolling to achieve precise outer diameter and wall thickness within specified tolerances.
- Surface Preparation: The tubing is mechanically cleaned and chemically passivated (Passivation Treatment) to remove surface contaminants and enhance passive oxide layer formation.
- Coil Forming: Using computerized roll-forming equipment (Computer Numerical Control, CNC), the tubing is coiled to the specified diameter with controlled bend radii to prevent micro-cracking or work hardening at the coil apex.
- Welding & Joining: Where coil ends or connections are required, orbital TIG welding (Tungsten Inert Gas Welding) or laser welding is employed to produce full-penetration joints with minimal heat-affected zone (Heat-Affected Zone, HAZ).
- Pressure Testing: Each coil assembly undergoes hydrostatic pressure testing at 1.5 times the maximum working pressure to verify leak-tightness and structural soundness.
- Final Inspection & Packaging: Visual inspection, dimensional verification, and material traceability documentation are completed prior to protective packaging for shipment.
Applications
The Model 1105 Direct Evaporative Ice Coil Tube is engineered for use in a diverse range of thermal management and refrigeration systems:
- Ice Storage Cooling Systems: Direct evaporative ice coil tubes serve as the primary heat exchange element in ice storage refrigeration plants, where refrigerant evaporates within the coil to freeze water into ice blocks for thermal energy storage and later cooling discharge.
- Industrial Process Cooling: Application in chemical processing, food and beverage manufacturing, and pharmaceutical production where precise temperature control is critical.
- Commercial Refrigeration: Use in supermarket refrigeration, cold storage facilities, and walk-in freezers requiring reliable long-term operation.
- Heat Recovery Systems: Integration into waste heat recovery and thermal energy management systems for improved energy efficiency.
- Cryogenic Applications: Suitable for low-temperature environments where stainless steel's ductility and resistance to embrittlement are essential.
- Marine & Offshore Refrigeration: Deployment in environments exposed to saltwater and corrosive atmospheres, leveraging the superior corrosion resistance of 316L-grade stainless steel.
Quality Certifications & Compliance
Wenzhou Jixing Metal Materials Co., Ltd. maintains a comprehensive quality management framework to ensure product reliability and regulatory compliance:
- ISO 9001:2015 — Quality Management System (Quality Management System, QMS) certification covering design, manufacturing, and service processes.
- ISO 14001:2015 — Environmental Management System (Environmental Management System, EMS) certification demonstrating commitment to sustainable manufacturing practices.
- ASME B31.5 — Compliance with the Pressure Piping Code for Refrigeration and Condenser Piping, ensuring safe design and fabrication of pressure-containing components.
- CE Marking — Conformity with European Union directives for machinery and pressure equipment, enabling market access across European Economic Area (European Economic Area, EEA) jurisdictions.
- Mill Test Certificates (MTC): Each batch is accompanied by EN 10204 Type 3.1 Mill Test Certificates verifying chemical composition, mechanical properties, and heat treatment status.
- Non-Destructive Testing (NDT): Product undergoes dye penetrant testing (Dye Penetrant Testing, DPT) or magnetic particle inspection (Magnetic Particle Inspection, MPI) for surface defect detection, and radiographic testing (Radiographic Testing, RT) for weld integrity verification.
Unique Selling Points
Superior Thermal Performance: The optimized coil geometry, validated through experimental research on direct evaporative cooling processes, maximizes heat transfer coefficient (Heat Transfer Coefficient, HTC) while minimizing refrigerant-side pressure drop, resulting in energy-efficient operation.
Exceptional Durability: The austenitic stainless steel construction provides resistance to refrigerant corrosion, oxidation, and mechanical fatigue, extending service life beyond 15 years under normal operating conditions.
Precision Engineering: CNC-controlled coil forming ensures uniform bend radii and consistent coil pitch, eliminating flow maldistribution that can degrade cooling performance in conventional coil assemblies.
Full Traceability: Every coil tube carries a unique identification code linked to material mill certificates, manufacturing records, and test data, enabling complete quality traceability throughout the product lifecycle.
Custom Configurability: Flexible customization of coil diameter, length, tube specification, and connection type accommodates project-specific design requirements without compromising quality standards.