STJH-STAINLESS-STEEL-WELDED-AIR-DUCT-304-NO4

Stainless Steel Welded Air Duct 304 No. 4

Brushed 304 duct for visible cleanable installations.

Directional surface grain gives visible faces a coordinated appearance.
Passivated seams support the stainless finish at welded areas.

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Product Introduction

Directional No. 4 finishing gives the exposed stainless faces a consistent grain. Continuous welded construction keeps the fabrication suitable for cleanable air routes, while the end-connection options allow the brushed section to join equipment or adjacent ductwork.

Key Features

Directional surface grain gives visible faces a coordinated appearance.
Passivated seams support the stainless finish at welded areas.

Technical Parameters

Steel Grade	304 stainless steel
Sheet Range	20–10 gauge
Exterior Finish	No. 4 brushed
Seam Process	TIG welded
Seam Treatment	Passivated
Typical Length	1524 mm nominal less flange allowance
End Connection	Welded flange or custom bolt flange
Cross Section	Custom rectangular or round
Surface Protection	Removable protective film option
Customization	Available for the intended exposed installation and operating environment.

Applications

Visible food-production service ducting
Exposed pharmaceutical mechanical areas

Solutions for Your Application

Mixed surface grains look inconsistent on visible runs.

The brushed finish can be oriented consistently across exposed faces.

Installation handling may mark the finish.

Protective film can shield visible surfaces until fitting is complete.

Available Options

Grain-direction selection
Companion flanges

Planning a Stainless Steel Welded Air Duct 304 No. 4 specification?

Send us your dimensions, installation conditions, performance targets and required surface finish.

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