Single Wall Round Spiral Duct and Fittings Construction Standards · SINGLE WALL ROND Max. 2005 SMACNA 2" WG 2005 SMACNA 4" WG 2005 SMACNA 6" WG Duct Spiral Rein. & Rein. & Spiral
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Single Wall Round Spiral Duct and Fittings Construction StandardsPositive Pressure
Gauge selection for galvanized steel (ASTM A653), paint grip steel, type 304 stainless steel, and poly coated steel (PCS/PVC).*Fittings are spot welded and/or gorelocked through 40" diameter. All larger fittings are continuously welded except for PCS/PVC fittings. All fittings can be provided as continuously welded if required.
Gauge selection for aluminum type 3003.Fittings are spot welded and/or gorelocked through 40" diameter. All larger fittings are continuously welded. All fittings can be provided as continuously welded if required.
Max. 2005 SMACNA 10" WG 2005 SMACNA 2" WG RIDCS CLASS 1 2" WGDuct Spiral Rein. & Rein. & Spiral Rein. & Rein. & Spiral Rein. & Rein. & Diam. Pipe Spacing Fittings Spacing Pipe Spacing Fittings Spacing Pipe Spacing Fittings Spacing 6" 26 26 26 24 22 22 8" 26 24 26 24 22 22 10" 26 24 26 24 22 22 12" 24 22 26 24 22 22 14" 24 A12 22 A12 26 24 22 22 16" 24 A12 22 A12 24 22 22 22 18" 24 A12 22 A12 24 22 20 20 F1 20 20" 24 A12 22 A12 24 22 20 20 F1 20 22" 24 A12 20 A12 24 22 18 20 F1 20 24" 22 A12 20 A12 24 20 18 20 F1 20 30" 22 A12 18 A12 22 20 16 18 F1 20 36" 20 B12 18 B12 22 20 16 16 F1 12 42" 20 B12 18 B12 20 18 20 F1 12 16 F1 12 48" 18 C12 16 C12 20 18 20 F1 12 14 F1 12 54" 18 D12 16 D12 18 16 20 F1 12 14 F1 12 60" 18 E12 16 E12 18 16 18 F1 12 12 F1 12 66" 18 E12 16 E10 16 14 18 F1 12 12 F1 12 72" 18 E12 16 F10 16 14 18 F1 12 12 F1 12 78" 16 G12 16 G6 16 14 18 F1 12 10 F1 12 84" 16 G12 16 G6 16 14 18 F1 12 10 F1 12 90" 16 G12 16 G6 N/A N/A 18 F1 12 10 F1 12 96" 16 G12 16 G6 N/A N/A 18 F1 12 10 F1 12
Single Wall Round Spiral Duct and Fittings Construction StandardsNegative Pressure
Gauge selection for galvanized steel (ASTM A653), paint grip steel, type 304 stainless steel, and poly coated steel (PCS/PVC).*Fittings are spot welded and/or gorelocked through 40" diameter. All larger fittings are continuously welded except for PCS/PVC fittings. All fittings can be provided as continuously welded if required.
A, B, C, D, E, F, G = Angle ring reinforcements per SMACNA 2005 HVAC DCS Table 3-2F1 = F1 reinforcement per SMACNA RIDCS, Chapter 12* Refer to note on the bottom of page 2.
Standard flange is ½".2" flange is also available.
Standard flange is ½".2" flange is also available.
Standard flange is ½".2" flange is also available.
Standard flange is ½".2" flange is also available.
Flange inor out
½" flange
SINGLE WALL ROUND
Installation
1/2"
1
2
34
5
67
8
ScrewPlacementSequence
1
2
34
5
67
8
ScrewPlacementSequence
SINGLE WALL SLIP JOINT
Metal fittings are sized to slip into, and should be used with, spiral duct. A tight fit is necessary to minimize friction loss and to promote proper sealing. Care should be taken during handling and installation to avoid dents and distortions that can cause improper fit or difficult installation.
1. Bring the bottom of the fitting collar into the spiral duct at a slight angle.
2. Carefully work the rest of the collar into the spiral duct until approxi-mately one inch of the colllar remains exposed between the end of the spiral duct and the stop bead of the fitting collar. Do not use a screw-driver or knife to help make the connection. Apply pressure with the heal of your hand or with your fist to help slip the fitting into the duct.
3. Apply duct sealer to this exposed area.
4. Push the fitting into the spiral duct until the stop bead meets the edge of the spiral duct.
5. 5. Fasten the fitting into the spiral duct with screws per the chart at right. The screws should be evenly spaced around the perimeter of the connection, approximately ½" back from the stop bead. Placement of the screws should be opposite of each other as demonstrated in the diagram.
FLANGE
Flanges come factory-mounted on fittings and spiral duct. Flanges are standard for all duct 61" in diameter, but are available in smaller sizes.
1. Place closed cell neoprene gasket on the face of one of the mating flanges.
2. Push the flanges together keeping the edges of the flanges aligned
3. Clamp the flanges to help hold them in place.
4. Screw the flanges together with self-tapping screws per the chart at right. The screws should be evenly spaced around the perimeter of the connection. Placement of the screws should be opposite of each other as demonstrated in the diagram.
Installation ofSlip Joint Connector
Installation ofFlange Connector
Duct Perimeter # of Screws Round Equiv. Slip Fit Flange 4"-9" 3 NA 10" 3 4 12"-16" 3 6 18"-20" 4 8 22"-26" 5 10 28"-30" 6 12 32"-36" 7 14 38"-42" 8 16 44"-46" 9 18 48"-52" 10 20 54"-56" 11 22 58"-60" 12 24 62"-66" NA 26 68"-72" NA 28 74"-76" NA 30 78"-84" NA 32
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