Tubing: Component Specs, Materials & Applications

Component Specifications

Definition

Tubing in evaporator coils is a critical component in refrigeration and air conditioning systems, designed to facilitate efficient heat transfer by circulating refrigerant. It typically consists of serpentine or coiled configurations that maximize surface area for heat absorption from the surrounding air or medium. The tubing must maintain structural integrity under varying pressures and temperatures while ensuring minimal thermal resistance and leakage.

Working Principle

Operates on the principle of phase-change heat transfer, where refrigerant inside the tubing evaporates from liquid to vapor, absorbing latent heat from the external environment. This process cools the surrounding air or fluid, with the tubing's design optimizing thermal conductivity and flow dynamics.

Materials

Commonly made from copper (C12200 or C11000) for high thermal conductivity and corrosion resistance, or aluminum alloys (e.g., 3003 or 6061) for lightweight applications. May include coatings or alloys for enhanced durability in specific environments.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	3/8" to 5/8" (9.5 mm to 15.9 mm)
Surface Finish	Smooth or enhanced (e.g., micro-grooved) for improved heat transfer
Wall Thickness	0.032" to 0.049" (0.81 mm to 1.24 mm)
Pressure Rating	300 to 600 psi (2.07 to 4.14 MPa)
Temperature Range	-40°F to 250°F (-40°C to 121°C)

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, DIN 2391

Parent Products

This component is used in the following industrial products

Evaporator Coil

A heat exchanger component in a climate control system where refrigerant evaporates, absorbing heat from the surrounding air.

View Product Details

Condenser Coil

A heat exchanger component in a dehumidifier that releases heat from the refrigerant to the surrounding air, causing the refrigerant to condense from vapor to liquid.

View Product Details

Engineering Analysis

Risks & Mitigation

Corrosion from moisture or chemicals
Fatigue failure due to thermal cycling
Leakage from poor joints or material defects

FMEA Triads

Trigger: Corrosive environment or incompatible materials
Failure: Leakage or reduced heat transfer efficiency
Mitigation: Use corrosion-resistant alloys, apply protective coatings, and conduct regular inspections.

Trigger: Excessive pressure or thermal stress
Failure: Cracking or bursting of tubing
Mitigation: Design with adequate safety margins, implement pressure relief systems, and follow maintenance schedules.

Industrial Ecosystem

Compatible With

Evaporator coils in refrigeration units, air conditioners, heat pumps

Typical Suppliers & Equivalents

Parker Hannifin, Wieland, Mueller Industries

Compliance & Inspection

Tolerance

±0.005" (0.13 mm) for diameter, ±10% for wall thickness

Test Method

Pressure testing per ISO 9303, leak detection with helium mass spectrometry

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 Tubing

Manufacturer profiles associated with Tubing.

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

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What are the main materials used for evaporator coil tubing?

Copper is most common due to its excellent thermal conductivity and corrosion resistance, while aluminum is used for lightweight or cost-sensitive applications.

How does tubing diameter affect evaporator coil performance?

Larger diameters reduce pressure drop and improve refrigerant flow, but may require more space; optimal sizing balances efficiency with system constraints.

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.

Tubing