Cooling Coil Tubes: Outer Diameter 6 mm to 25 mm

Component Specifications

Definition

Cooling coil tubes are precision-engineered tubular components typically arranged in serpentine or parallel configurations within cooling coils or jackets. They facilitate heat exchange by allowing refrigerant (e.g., R-134a, ammonia) or coolant (e.g., water, glycol mixtures) to flow through them, absorbing thermal energy from surrounding air or process fluids. These tubes are critical in HVAC systems, industrial chillers, refrigeration units, and process cooling applications, where they transfer heat from the medium being cooled to the refrigerant/coolant, which is then dissipated elsewhere. Their design optimizes surface area contact, flow dynamics, and thermal conductivity for efficient heat removal.

Working Principle

Cooling coil tubes operate on the principle of convective heat transfer. A cold refrigerant or coolant flows through the tubes, creating a temperature gradient between the tube walls and the surrounding air or fluid. Heat from the external medium is conducted through the tube wall and absorbed by the internal fluid via convection. In direct expansion (DX) systems, refrigerant evaporates inside the tubes, absorbing latent heat. In chilled water systems, coolant circulates without phase change. The tubes' geometry (e.g., diameter, length, fin attachments) enhances turbulence and surface area to maximize heat exchange efficiency.

Materials

Materials include copper (C12200 for corrosion resistance), aluminum alloys (e.g., 3003 for lightweight applications), stainless steel (304/316 for corrosive environments), and cupronickel (90/10 or 70/30 for marine/offshore use). Tubes may have inner grooves or micro-fins to improve heat transfer. Specifications: ASTM B280 for copper, ASTM B210 for aluminum, ASTM A213 for stainless steel. Wall thickness typically ranges from 0.5 mm to 2.0 mm, depending on pressure ratings (e.g., up to 500 psi for hydraulic applications).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	Custom up to 30 meters
Outer Diameter	6 mm to 25 mm
Surface Finish	Smooth or internally grooved
Wall Thickness	0.5 mm to 2.0 mm
Connection Type	Expanded, brazed, or mechanical fittings
Pressure Rating	Up to 500 psi
Thermal Conductivity	200-400 W/m·K (copper)

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 9300, DIN 1785, ASHRAE 15, ASTM B280

Parent Products

This component is used in the following industrial products

Cooling Coils/Jacket

A cooling coils/jacket is an integral heat exchange component of a neutralization reactor designed to remove excess heat generated during exothermic neutralization reactions.

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Engineering Analysis

Risks & Mitigation

Corrosion from moisture or chemicals
Fouling reducing heat transfer efficiency
Mechanical fatigue from vibration
Refrigerant leaks causing system failure
Freeze damage in low-temperature operations

FMEA Triads

Trigger: Corrosive coolant or environmental exposure
Failure: Tube wall perforation leading to leaks
Mitigation: Use corrosion-resistant materials (e.g., cupronickel), apply protective coatings, implement water treatment programs, and conduct regular thickness testing.

Trigger: Poor brazing or joint installation
Failure: Connection leaks compromising system pressure
Mitigation: Follow ASHRAE brazing standards, use certified technicians, perform pressure tests post-installation, and inspect joints with non-destructive testing (e.g., ultrasonic).

Trigger: Inadequate fluid velocity or debris accumulation
Failure: Fouling and reduced heat transfer efficiency
Mitigation: Install filters/strainers, maintain recommended flow rates (e.g., 1-3 m/s for water), schedule periodic chemical cleaning, and use anti-fouling tube designs.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Diameter tolerance ±0.1 mm, wall thickness tolerance ±10%, straightness within 1 mm per meter

Test Method

Pressure testing per ISO 9300 (hydrostatic or pneumatic), leak detection with halogen or helium mass spectrometry, material verification via spectroscopy, and dimensional checks with calipers/ultrasonic gauges.

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

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Manufacturers of Cooling Coil Tubes

Manufacturer profiles associated with Cooling Coil Tubes.

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Frequently Asked Questions

What are the common materials for cooling coil tubes?

Copper is most common for high thermal conductivity and corrosion resistance; aluminum is used for lightweight applications; stainless steel and cupronickel are chosen for corrosive or marine environments.

How do cooling coil tubes differ from heating coil tubes?

Cooling coil tubes are designed for heat absorption, often with refrigerants that evaporate inside, while heating coil tubes typically use hot water or steam for heat emission, with differences in material stress ratings and corrosion protection.

What maintenance is required for cooling coil tubes?

Regular cleaning to prevent fouling (e.g., with coil brushes), leak testing (pressure or dye tests), and inspection for corrosion or erosion, especially in hard water or chemical exposure environments.

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.

Cooling Coil Tubes