Double-Wall, Round Fittings

A complete line of fittings designed for low leakage and efficient performance is available for use with McGill AirFlow’s double-wall, round duct. Each fitting is sized accurately to allow easy field assembly. Fittings are available in solid welded, spot or tack welded and sealed, lap and riveted (or screwed) and sealed, and standing seam constructions.

Double-Wall, Round Fittings
Available Sizes, Materials, and Thicknesses

(1) Standard insulation density is 1.0 pcf.

(2) Except as noted, McGill AirFlow double-wall, round duct and fittings are available with the following outer shell dimensions: 5-inch through 15-inch diameters in 1/2-inch-diameter increments, 16-inch through 38-inch diameters in 1-inch-diameter increments, and 40-inch through 90-inch diameters in 2-inch-diameter increments. Standard fitting liners are solid metal. Standard insulation is fiberglass.

(3) Double-wall, round duct and fittings are also available in carbon steel, paintable galvanized steel, types 304 and 316 stainless steel, and type 3003-H14 aluminum.

(4) UNI-COAT® double-wall, round duct and fittings (polyvinyl-chloride-coated galvanized steel) are available on special order.

(5) Aluminum double-wall, round duct and fittings are available in larger diameters and greater thicknesses on special order.

(6) Fittings made from 16-gauge (Aluminum - 0.090 inch) or heavier are fully welded.

(7) SilverGuard™ double-wall, round duct and fittings (pre-coated with an antimicrobial) are available on special order.

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An enterprise of United McGill Corporation—Family owned and operated since 1951

Unless otherwise noted, all (™) trademarks and (®) registered trademarks are property of United McGill Corporation.