Aluminum Spiral Ductwork

Aluminum spiral ductwork produced on our State-of-the-Art Betech pipe machine, is the ultimate in pressure tight circular tubes of superior quality. It consists of a smooth interior for low friction loss and a 4-ply lockseam entirely on the outside for high strength and rigidity.

Sizes and Gauges:

4” – 10” are available in 1 inch increments
12” – 64” are available in 2 inch increments

SMACNA 2005 3rd edition gauges will be used unless otherwise specified.


Elbows will have a radius which is 1-1/2 times the diameter (long radius) to centerline is standard.

Fitting ends are made with two inch male sleeves with a stop-bead up to 36” in diameter.

Fittings will be welded.

Fittings are machine cut on our State-of-the-Art Vulcan Plasma table, assuring manufacturing tolerance consistency.

Specialty Fittings:

Specialty configurations are available upon request. Some examples are as follows: Elbows (75, 15 and other degree angles are also available), a wide variety of different radii are available. Flange connections are available by the following, but not limited to: Angle Rings or, AccuDuct, Spiral Mate.

Construction Standards:

As listed in the current SMACNA HVAC Duct Construction Standards. Other regulatory construction standards are available upon request.

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