Spiral Pipe Sizes & Specifications

Spiral welded pipes are manufactured across a broad size spectrum. For industrial ductwork applications, sizes typically begin at 3 inches and can exceed 80 inches in diameter. Gage thickness varies by diameter: 24 gage for 3-inch, 22 gage for 4–13 inch, and 20 gage for 14–16 inch pipes, with specifications available for larger diameters on request.

Spiral pipe is available in galvanized steel, galvaneal, stainless steel 304, stainless steel 316, and aluminum. Each material suits different environments — stainless steel for corrosive or food-grade settings, aluminum for lightweight applications, and galvanized for general-purpose HVAC and dust collection systems.

Standard gage specifications depend on pipe diameter. Three-inch pipe uses 24 gage, diameters from 4 to 13 inches use 22 gage, and 14 to 16 inch pipe uses 20 gage. Heavier or lighter gage options may be available for custom orders based on application pressure and structural requirements.

Yes, custom fabrication is available for spiral pipe. Duct Incorporated offers non-standard diameters, special materials, and unique configurations. Design assistance and technical support services are provided to ensure the custom pipe meets your system's airflow, pressure, and installation requirements accurately.

Spiral pipes are used across industrial dust collection systems, HVAC and air distribution, pneumatic conveying, material handling, fume extraction, and exhaust systems. The broad diameter range and multiple material options make them suitable for light commercial installations as well as heavy-duty industrial ventilation networks.

Galvanized spiral pipe features a zinc coating that provides corrosion resistance for general HVAC and ventilation use. Stainless steel 304 or 316 pipe offers superior corrosion resistance, higher temperature tolerance, and is preferred in chemical processing, food production, and environments with aggressive fumes or moisture exposure.