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Spiral Pipe
Standard dimensions spiral ducts - imperial units
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Physical properties of spiral pipe - imperial units - are indicated below.
| Nominal Diameter | Outside Diameter | Wall Thickness | Weight |
| 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 |
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