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Spiral Oval Products
Please note that the following list is but a sample of the spiral oval from Shade Tree Mfg. LLC. Configurations are subject to change. Call or e-mail us and we will be happy to supply you with our most recent product catalog and answer any questions you may have.
Spiral Oval Pipe

All pipe is fabricated from materials in gauges that meet or exceed SMACNA standards.
Spiral Construction Medium Pressure Oval Duct
Major Axis
Gauge (Minimum)
24" and Smaller
24 Ga
25" to 48"
22 Ga
49" to 74"
20 Ga
Longseam Construction Medium Pressure Oval Duct
(For Sizes Not Available in Spiral Construction)
Major Axis
Gauge (Minimum)
30" and Smaller
20 Ga
31" to 40"
18 Ga
41" and Larger
16 Ga
Spiral Oval Fittings

All fittings are made standard as male size (1/8" smaller) for slip fit into standard spiral ducts except for female coupling, which is made female size equivalent to standard spiral ducts. Fittings come standard unsealed, with sealing available on request. Fittings are fabricated from materials that meet or exceed SMACNA standards. Fittings are standard fabricated (but not limited to) the following chart:
Fitting Construction Medium Pressure Oval Duct
Major Axis
Gauge (Minimum)
36" and Smaller
22 Ga
37" to 50"
20 Ga
51" and Larger
18 Ga
Connection Types
Slip-Fit Connection
Welded Ring
Van Stone (Pipe)
Van Stone (Fitting)
Reducers
Length = Diam Change
(minimum 4" with 2" Collars)

Standard Fitting Type Is Concentric. Specify All Axes And Changes If Not Concentric.
Include Sketch Where Necessary
Easy Way Elbows
Up to 35° = 2 Gore Construction
35° to 55° = 3 Gore Construction
55° to 75° = 4 Gore Construction
75° to 90° = 5 Gore Construction

1.5 Centerline Radius Standard Construction
Hard Way Elbows
Up to 35° = 2 Gore Construction
35° to 55° = 3 Gore Construction
55° to 75° = 4 Gore Construction
75° to 90° = 5 Gore Construction

1.5 Centerline Radius Standard Construction
Specialty Elbows
Three-Piece Gored 45°
Elbow with Tap
Five-Piece Gored 90°
Elbow with Tap
Tees
Straight Tap
Lateral Tap
Conical Tap
Specify All Axes And Branch Type When Ordering

See Below for Branch Types
Crosses
Double Straight Tap
Double Lateral Tap
Double Conical Tap
Specify All Axes And Branch Type When Ordering

Branch Types Can Be MIx and Matched

See Below for Branch Types
Branch Types

Specify Branch Type When Ordering (Standard Type is Straight Branch)
Shoe

4" Long
2" Collar
Base 4" Wider
Conical

5" Long
2" Collar
Base is 2" Wider
Lateral

6" Long
2" Collar
45° Outlet
Straight

2" Long
2" Collar
Wye Pants
Specify All Axes when ordering
Branch lengths and spread depend on diameters involved.
Square to Oval
Round to Oval
Specify Axes, Round, and Rectangular Components when ordering
Lengths and spread depend on Changes Involved.
Standard Construction is Concentric - Include Sketch If Not Concentric
Easy Way Offset
Hard Way Offset
Specify Axes,Set, and Length when ordering
Lengths May Be Limited By Changes Involved - CallTo Verify
Lateral Tap
Shoe Tap
Length = 6" at 45° Angle, 2" Collar
Length = 6" with 45° Inlet Angle, 2" Collar
Access Taps
Rectangular Tap without Tabs
Shoe Tap (with or without Tabs)
Rectangular Tap with Tabs
Bell Mouth Tap
Bell Mouth Taps are designed as a takeoff from rectangular ductwork and are available in 2 different configurations:
Normal Radius

Throat Radius = 0.2 x Diameter
Length = Throat Radius + 1"
Bell End Width = Diamter + 4"
Short Radius

Throat Radius = 2"
Length = 3"
Bell End Width = Diamter + 4"
Caps & Connectors
Fitting Connector (Female)
Pipe Connector (Male)
End Cap (Male)
Insulation Stop
Flex Connector (Female)
Starting Flex Collar (Male)
Starting Collar (Male)
Pipe Connector (Male)
Fitting Connector (Female)
End Cap (Male)
Flex Connector (Female)
Starting Flex Connector (Male)
Starting Collar (Male)
 Spiral Slip Fit, 4" Long
Spiral Acutal Fit, 4.5" Long
Spiral Slip Fit 2" Long
Spiral Actual Fit, 7" Long (Stretched)
Spiral Slip Fit, 9" Long (Stretched)
Spiral Slip Fit, 2" Long
Miscellaneous

While this listing covers a wide variety of products that Shade Tree Mfg. offers, options are not limited to only what you see here. A sample of other products and services are as follows, and feel free to contact us with any questions or products that you might need.

Reducing elbows

Specialty Radius Elbows (e.g. 1 x or 2 x Centerline Radius)

Mitered 90° Elbows with or without turnvanes

Blast Gates (Half or Full)

Spiralmate™, Keating™, Companion Flange

Duct Cap Temporary Duct Cover

Stamped Saddle Taps

Stamped Elbows

Duct Sealant

Corrugated Double Rib Pipe

Double Wall Pipe And Fittings

Specialty Materials (PCD, Stainless, Aluminum, Paint Grip/ Galvaneel)