Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

This is an AMP page - Open full page! for all features.

• the most efficient way to navigate the Engineering ToolBox!

Spiral Ducts - Dimensions

Physical properties of spiral pipe - imperial units - are indicated below.

Spiral Ducts - Dimensions
Nominal DiameterOutside DiameterWall ThicknessWeight
(in)(in)(in)(lb/ft)
3 3 0.0276 1.1
4 4 0.0276 1.4
5 5 0.0276 1.7
6 6 0.0276 2.0
7 7 0.0276 2.4
8 8 0.0276 2.8
9 9 0.0276 3.1
10 10 0.0276 3.4
11 11 0.0276 3.8
12 12 0.0276 4.1
13 13 0.0276 4.5
14 14 0.0276 4.8
15 15 0.0276 5.1
16 16 0.0276 5.5
17 17 0.0276 5.8
18 18 0.0276 6.1
20 20 0.0276 6.8
22 22 0.0336 9.1
24 24 0.0336 9.9
26 26 0.0336 10.8
28 28 0.0336 11.6
30 30 0.0336 12.4
32 32 0.0336 13.3
34 34 0.0336 14.1
36 36 0.0336 14.9
38 38 0.0396 18.5
40 40 0.0396 19.5
42 42 0.0396 20.5
44 44 0.0396 21.5
46 46 0.0396 22.5
48 48 0.0396 23.4
50 50 0.0516 32.4
52 52 0.0516 33.7
54 54 0.0516 35.0
56 56 0.0516 36.3
58 58 0.0516 37.6
60 60 0.0516 38.8
62 62 0.0516 41.1
64 64 0.0516 43.4
66 66 0.0516 44.7
68 68 0.0516 46.1
70 70 0.0516 47.4
72 72 0.0516 48.8

Related Topics

• Ventilation Systems

Design of systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more.

Related Documents

Air Ducts - Major Friction Head Loss, Online Calculator

Head loss or major loss in air ducts - equations and online calculator for rectangular and circular ducts - Imperial and SI units.

Circular Ducts - Dimensions

Standard size of circular ventilation air ducts.

Duct Velocity

Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator.

Ducts or Pipes through Steel Joists - Maximum Sizes

Maximum sizes of ducts or pipes through K series joists.

Ducts Sizing - the Velocity Reduction Method

The velocity reduction method can be used when sizing air ducts.

Equivalent Diameter - Rectangular vs. Circular HVAC Ducts

Rectangular equivalent diameter for air flows between 100 - 50000 cfm.

HVAC Ducts - Air Velocities

Recommended air velocities in HVAC ducts.

Search Engineering ToolBox

• the most efficient way to navigate the Engineering ToolBox!

SketchUp Extension - Online 3D modeling!

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!