Lightweight aluminum cleanroom air duct with reinforced rectangular panels

Cleanroom Air Distribution Systems

Aluminum Air Duct

A lightweight aluminum sheet duct for clean, non-abrasive air systems where corrosion resistance and reduced suspended load are important.

Low Structural Weight
Natural Corrosion Resistance
Clean Smooth Interior
Rectangular or Round Format

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Product Introduction

Aluminum ductwork reduces the dead load carried by cleanroom ceiling supports while providing a naturally corrosion-resistant surface for conditioned air. Sections are fabricated from 3003 or 5052 aluminum sheet using lock-formed or welded seams and aluminum flange components. Because aluminum is softer than steel, panel reinforcement and support spacing are selected to prevent distortion during transport and operation. The non-sparking, non-ferrous construction is useful in selected technical areas, provided the conveyed chemicals and galvanic interfaces are compatible with the chosen alloy.

Key Features

Low sheet density reduces handling effort and the permanent load on overhead support systems.

A stable aluminum oxide layer protects the surface in normal indoor clean-air service.

Non-ferrous construction avoids rust staining from exposed cut edges.

Formed stiffeners and closer hanger spacing control deformation in broad rectangular panels.

Customer Product Concerns

Lightweight aluminum duct must be detailed around its lower stiffness, dissimilar-metal contacts and the actual chemical exposure of the air stream.

A steel duct route places excessive load on a long-span cleanroom ceiling.Aluminum sheet lowers duct mass while maintaining the scheduled internal dimensions.

Soft panels dent during lifting and field assembly.Protective packaging, reinforced faces and controlled lifting points maintain the duct geometry.

Direct contact with steel hangers causes galvanic staining in humid areas.Non-conductive isolation pads and compatible fasteners separate dissimilar metals.

A selected cleaning agent dulls or pits the aluminum finish.Alloy and surface treatment are matched to the documented chemical and cleaning exposure.

Typical Applications

Cleanroom supply-air branchesLightweight ceiling duct routesHumidity-controlled production roomsMarine or coastal technical areasNon-ferrous ventilation assemblies

Technical Parameters

Common construction ranges for fabricated aluminum air duct are summarized below.

Core Material	3003-H14 or 5052-H32 aluminum alloy sheet
Panel Thickness	0.8–1.8 mm, selected by duct dimension and pressure duty
Effective Width	150–1600 mm rectangular side dimension
Maximum Length	1200–1500 mm per fabricated section
Steel Facing Thickness	0.8–1.8 mm aluminum wall in place of steel facing
Core Density	Approximately 2700 kg/m³ solid aluminum construction
Thermal Conductivity	Approximately 138–170 W/(m·K), depending on aluminum alloy
Surface Finish	Mill finish, clear anodized or powder-coated aluminum
Joint Type	Aluminum flange or slip joint with compatible gasket and isolated fasteners
Customization	Available based on the intended application and operating environment.

Available Options

3003 or 5052 alloyClear anodized or powder-coated finishRectangular, round and transition sectionsInternal acoustic or external thermal insulation

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