INDUSTRY COMPONENT

Coil Tubes

Coil tubes are essential heat exchange components in evaporators, designed to efficiently transfer thermal energy between refrigerant and surrounding media.

Component Specifications

Definition
Coil tubes are precision-engineered tubular components within evaporator systems that facilitate phase change heat transfer. They consist of serpentine or helical arrangements of metal tubing through which refrigerant flows, absorbing heat from the surrounding environment during evaporation. These tubes are engineered with specific geometries to maximize surface area contact and optimize thermal conductivity while maintaining structural integrity under varying pressure and temperature conditions.
Working Principle
Coil tubes operate on the principle of convective and conductive heat transfer. Refrigerant enters as a low-pressure liquid-vapor mixture, absorbing latent heat from the surrounding air or liquid medium as it evaporates within the tubes. The tube material's thermal conductivity, combined with optimized flow patterns and surface enhancements, maximizes heat absorption efficiency while maintaining proper refrigerant distribution throughout the evaporator system.
Materials
Typically copper (C12200, C10200) or aluminum alloys (3003, 6061) with internal grooving or enhanced surfaces. Copper offers superior thermal conductivity (385 W/m·K) and corrosion resistance, while aluminum provides lighter weight and cost advantages. Special applications may use stainless steel (304, 316) for corrosive environments.
Technical Parameters
ParameterTypical rangeNotes & selection driver
Tube OD3/8" to 5/8" (9.5mm to 15.9mm)
Surface Area0.1-0.3 ft²/ft (0.03-0.09 m²/m)
Wall Thickness0.016" to 0.035" (0.4mm to 0.9mm)
Temperature Range-40°F to 300°F (-40°C to 149°C)
Length Per Circuit10-50 ft (3-15 m)
Operating Pressure150-500 psi (10-34 bar)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 9303, ISO 9304, DIN 2391, ASTM B88

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Corrosion and erosion
  • Refrigerant leakage
  • Fouling and scaling
  • Mechanical fatigue
  • Improper brazing/welding
FMEA Triads
Trigger: Corrosive environment or incompatible materials
Failure: Tube wall perforation leading to refrigerant leakage
Mitigation: Implement corrosion-resistant materials, protective coatings, and regular pH monitoring of surrounding media
Trigger: Vibration-induced stress or improper installation
Failure: Fatigue cracking at bends or connections
Mitigation: Install vibration dampeners, ensure proper support spacing, and follow torque specifications during assembly
Trigger: Mineral deposits or biological growth
Failure: Reduced heat transfer efficiency and increased pressure drop
Mitigation: Implement water treatment programs, regular cleaning schedules, and install filtration systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.002" on diameter, ±0.001" on wall thickness, ±1° on bend angles
Test Method
Hydrostatic pressure testing at 1.5x operating pressure, helium leak detection, eddy current testing for wall thickness uniformity

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Coil Tubes

Manufacturer profiles associated with Coil Tubes.

Sourcing Coil Tubes from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Chrome Plating
Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.
Upper Tool (Punch)
Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.
Main Frame
The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.
Shaft Bearing
Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Frequently Asked Questions

What is the difference between copper and aluminum coil tubes?

Copper offers better thermal conductivity and corrosion resistance but is more expensive. Aluminum provides lighter weight and lower cost but requires larger surface areas for equivalent heat transfer. Material selection depends on application requirements, budget, and environmental conditions.

How often should coil tubes be inspected?

Industrial evaporator coil tubes should undergo visual inspection every 3-6 months and comprehensive testing annually. Frequency increases in corrosive environments or high-usage applications to prevent efficiency loss and catastrophic failures.

Can different coil tube materials be mixed in one system?

Generally not recommended due to galvanic corrosion risks. If mixing is unavoidable, proper isolation techniques and corrosion inhibitors must be implemented, following ASHRAE and manufacturer guidelines.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Request Manufacturing Insight for Coil Tubes

Thank you. Your request has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at contact@cnfx.com.
Yoke Bracket
Get QuotesChat