Boiler & Condenser Tubes Reference: Inches
| Thickness of Wall and Birmingham Wire GA and in Millimeters | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tube | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | ||
| OD (Inches) | OD (mm) | ID | .9 | 1.1 | 1.2 | 1.5 | 1.7 | 1.8 | 2.1 | 2.4 | 2.8 | 3.0 | 3.4 | 3.8 | 4.2 | 4.6 | 5.2 | 5.6 | 6.0 | 6.6 | 7.2 | 7.6 | 8.6 |
| 1/2 | 12.7 | Min. | 10.7 | 10.4 | 10.0 | 9.5 | 9.1 | 8.7 | 8.1 | 7.4 | 6.6 | 6.0 | |||||||||||
| Nom. | 10.9 | 10.6 | 10.2 | 9.8 | 9.4 | 9.0 | 8.5 | 7.9 | 7.2 | 6.6 | |||||||||||||
| 5/8 | 15.9 | Min. | 13.9 | 13.5 | 13.1 | 12.6 | 12.2 | 11.9 | 11.3 | 10.6 | 9.8 | 9.2 | 8.4 | 7.6 | 6.7 | 5.8 | |||||||
| Nom. | 14.1 | 13.7 | 13.4 | 12.9 | 12.6 | 12.2 | 11.7 | 11.0 | 10.3 | 9.8 | 9.1 | 8.4 | 7.5 | 6.7 | |||||||||
| 3/4 | 19.1 | Min. | 17.1 | 16.7 | 16.3 | 15.8 | 15.4 | 15.0 | 14.4 | 13.8 | 13.0 | 12.3 | 11.6 | 10.8 | 9.8 | 9.0 | 7.7 | 6.8 | 5.7 | 4.6 | |||
| Nom. | 17.3 | 16.9 | 16.6 | 16.1 | 15.7 | 15.4 | 14.8 | 14.2 | 13.5 | 13.0 | 12.2 | 11.5 | 10.7 | 9.9 | 8.7 | 7.9 | 7.0 | 5.9 | |||||
| 7/8 | 22.2 | Min. | 20.2 | 19.9 | 19.5 | 19.0 | 18.6 | 18.2 | 17.6 | 16.9 | 16.2 | 15.5 | 14.7 | 13.9 | 13.0 | 12.2 | 10.9 | 9.9 | 8.9 | 7.7 | |||
| Nom. | 20.4 | 20.1 | 19.7 | 19.3 | 18.9 | 18.6 | 18.0 | 17.4 | 16.7 | 16.1 | 15.4 | 14.7 | 13.8 | 13.1 | 11.9 | 11.0 | 10.1 | 9.1 | |||||
| 1 | 25.4 | Min. | 23.4 | 23.1 | 22.7 | 22.2 | 21.8 | 21.4 | 20.8 | 20.1 | 19.3 | 18.7 | 17.9 | 17.1 | 16.2 | 15.3 | 14.0 | 13.1 | 12.1 | 10.9 | 9.5 | 8.6 | 6.4 |
| Nom. | 23.6 | 23.3 | 22.9 | 22.5 | 22.1 | 21.7 | 21.2 | 20.6 | 19.9 | 19.3 | 18.6 | 17.9 | 17.0 | 16.3 | 15.1 | 14.2 | 13.3 | 12.2 | 11.0 | 10.2 | 8.1 | ||
| 1-1/8 | 28.6 | Min. | 26.6 | 26.2 | 25.8 | 25.3 | 24.9 | 24.6 | 24.0 | 23.3 | 22.5 | 21.9 | 21.1 | 20.3 | 19.4 | 18.5 | 17.2 | 16.3 | 15.3 | 14.1 | 12.7 | 11.8 | 9.6 |
| Nom. | 26.8 | 26.4 | 26.1 | 25.6 | 25.3 | 24.9 | 24.4 | 23.7 | 23.0 | 22.5 | 21.8 | 21.1 | 20.2 | 19.4 | 18.3 | 17.4 | 16.5 | 15.4 | 14.1 | 13.3 | 11.3 | ||
| 1-1/4 | 31.8 | Min. | 29.8 | 29.4 | 29.0 | 28.5 | 28.1 | 27.7 | 27.1 | 26.4 | 25.7 | 25.0 | 24.3 | 23.5 | 22.5 | 21.7 | 20.4 | 19.5 | 18.4 | 17.3 | 15.9 | 15.0 | 12.8 |
| Nom. | 30.0 | 29.6 | 29.3 | 28.8 | 28.4 | 28.1 | 27.5 | 26.9 | 26.2 | 25.7 | 24.9 | 24.2 | 23.4 | 22.6 | 21.4 | 20.6 | 19.7 | 18.6 | 17.3 | 16.5 | 14.5 | ||
| 1-3/8 | 34.9 | Min. | 32.9 | 32.6 | 32.2 | 31.7 | 31.3 | 30.9 | 30.3 | 29.6 | 28.9 | 28.2 | 27.5 | 26.6 | 25.7 | 24.9 | 23.6 | 22.6 | 21.6 | 20.4 | 19.1 | 18.2 | 15.9 |
| Nom. | 33.1 | 32.8 | 32.4 | 32.0 | 31.6 | 31.3 | 30.7 | 30.1 | 29.4 | 28.8 | 28.1 | 27.4 | 26.5 | 25.8 | 24.6 | 23.7 | 22.8 | 21.8 | 20.5 | 19.7 | 17.7 | ||
| 1-1/2 | 38.1 | Min. | 36.1 | 35.8 | 35.4 | 34.8 | 34.5 | 34.1 | 33.5 | 32.8 | 32.0 | 31.4 | 30.6 | 29.8 | 28.9 | 28.0 | 26.7 | 25.8 | 24.8 | 23.6 | 22.2 | 21.3 | 19.1 |
| Nom. | 36.3 | 36.2 | 35.6 | 35.2 | 34.8 | 34.4 | 33.9 | 33.3 | 32.6 | 32.0 | 31.3 | 30.6 | 29.7 | 29.0 | 27.8 | 26.9 | 26.0 | 24.9 | 23.7 | 22.9 | 20.8 | ||
| 1-3/4 | 44.5 | Min. | 42.5 | 42.1 | 41.7 | 41.2 | 40.8 | 40.4 | 39.8 | 39.1 | 38.4 | 37.7 | 37.0 | 36.2 | 35.2 | 34.4 | 33.1 | 32.2 | 31.1 | 30.0 | 28.6 | 27.7 | 25.5 |
| Nom. | 42.7 | 42.3 | 42.0 | 41.5 | 41.1 | 40.8 | 40.2 | 39.6 | 38.9 | 38.4 | 37.6 | 36.9 | 36.1 | 35.3 | 34.1 | 33.3 | 32.4 | 31.3 | 30.0 | 29.2 | 27.2 | ||
| 2 | 50.8 | Min. | 48.8 | 48.5 | 48.1 | 47.5 | 47.2 | 46.8 | 46.2 | 45.5 | 44.7 | 44.1 | 43.3 | 42.5 | 41.6 | 40.7 | 39.4 | 38.5 | 37.5 | 36.3 | 34.9 | 34.0 | 31.8 |
| Nom. | 49.0 | 48.7 | 48.3 | 47.9 | 47.5 | 47.1 | 46.6 | 46.0 | 45.3 | 44.7 | 44.0 | 43.3 | 42.4 | 41.7 | 40.5 | 39.6 | 38.7 | 37.6 | 36.4 | 35.6 | 33.5 | ||
| 2-1/4 | 57.2 | Min. | 55.2 | 54.8 | 54.4 | 53.9 | 53.5 | 53.1 | 52.5 | 51.8 | 51.1 | 50.4 | 49.7 | 48.9 | 47.9 | 47.1 | 45.8 | 44.9 | 43.8 | 42.7 | 41.3 | 40.4 | 38.2 |
| Nom. | 55.4 | 55.0 | 54.7 | 54.2 | 53.8 | 53.5 | 52.9 | 52.3 | 51.6 | 51.1 | 50.3 | 49.6 | 48.8 | 48.0 | 46.8 | 46.0 | 45.1 | 44.0 | 42.7 | 41.9 | 39.9 | ||
| 2-1/2 | 63.5 | Min. | 61.5 | 61.2 | 60.8 | 60.2 | 59.9 | 59.5 | 58.9 | 58.2 | 57.4 | 56.8 | 56.0 | 55.2 | 54.3 | 53.4 | 52.1 | 51.2 | 50.2 | 49.0 | 47.6 | 46.7 | 44.5 |
| Nom. | 61.7 | 61.4 | 61.0 | 60.6 | 60.2 | 59.8 | 59.3 | 58.7 | 58.0 | 57.4 | 56.7 | 56.0 | 55.1 | 54.4 | 53.2 | 52.3 | 51.4 | 50.3 | 49.1 | 48.3 | 46.2 | ||
| 2-3/4 | 69.9 | Min. | 67.9 | 67.5 | 67.1 | 66.6 | 66.2 | 65.8 | 65.2 | 64.5 | 63.8 | 63.1 | 62.4 | 61.6 | 60.6 | 59.8 | 58.5 | 57.6 | 56.5 | 55.4 | 54.0 | 53.1 | 50.9 |
| Nom. | 68.1 | 67.7 | 67.4 | 66.9 | 66.5 | 66.2 | 65.6 | 65.0 | 64.3 | 63.8 | 63.0 | 62.3 | 61.5 | 60.7 | 59.5 | 58.7 | 57.8 | 56.7 | 55.4 | 54.6 | 52.6 | ||
| 3 | 76.2 | Min. | 74.2 | 73.9 | 73.5 | 72.9 | 72.6 | 72.2 | 71.6 | 70.9 | 70.1 | 69.5 | 68.7 | 67.9 | 67.0 | 66.1 | 64.8 | 63.9 | 62.9 | 61.7 | 60.3 | 59.4 | 57.2 |
| Nom. | 74.4 | 74.1 | 73.7 | 73.3 | 72.9 | 72.5 | 72.0 | 71.4 | 70.7 | 70.1 | 69.4 | 68.7 | 67.8 | 67.1 | 65.9 | 65.0 | 64.1 | 63.0 | 61.8 | 61.0 | 58.9 | ||
| 3-1/4 | 82.6 | Min. | 80.6 | 80.2 | 79.8 | 79.3 | 78.9 | 78.5 | 77.9 | 77.2 | 76.5 | 75.8 | 75.1 | 74.3 | 73.3 | 72.5 | 71.2 | 70.3 | 69.2 | 68.1 | 66.7 | 65.8 | 63.6 |
| Nom. | 80.8 | 80.4 | 80.1 | 79.6 | 79.2 | 78.9 | 78.3 | 77.7 | 77.0 | 76.5 | 75.7 | 75.0 | 74.2 | 73.4 | 72.2 | 71.4 | 70.5 | 69.4 | 68.1 | 67.3 | 65.3 | ||
| 3-1/2 | 88.9 | Min. | 86.9 | 86.6 | 86.2 | 85.6 | 85.3 | 84.9 | 84.3 | 83.6 | 82.8 | 82.2 | 81.4 | 80.6 | 79.7 | 78.8 | 77.5 | 76.6 | 75.6 | 74.4 | 73.0 | 72.1 | 69.9 |
| Nom. | 87.1 | 86.8 | 86.4 | 86.0 | 85.6 | 85.2 | 84.7 | 84.1 | 83.4 | 82.8 | 82.1 | 81.4 | 80.5 | 79.8 | 78.6 | 77.7 | 76.8 | 75.7 | 74.5 | 73.7 | 71.6 | ||
| 3-3/4 | 95.3 | Min. | 93.3 | 92.9 | 92.5 | 92.0 | 91.6 | 91.2 | 90.6 | 89.9 | 89.2 | 88.5 | 87.8 | 87.0 | 86.0 | 85.2 | 83.9 | 83.0 | 81.9 | 80.8 | 79.4 | 78.5 | 76.3 |
| Nom. | 93.5 | 93.1 | 92.8 | 92.3 | 91.9 | 91.6 | 91.0 | 90.4 | 89.7 | 89.2 | 88.4 | 87.7 | 86.9 | 86.1 | 84.9 | 84.1 | 83.2 | 82.1 | 80.8 | 80.0 | 78.0 | ||
| 4 | 101.6 | Min. | 99.6 | 99.3 | 98.9 | 98.3 | 98.0 | 97.6 | 97.0 | 96.3 | 95.5 | 94.9 | 94.1 | 93.3 | 92.4 | 91.5 | 90.2 | 89.3 | 88.3 | 87.1 | 85.7 | 84.8 | 82.6 |
| Nom. | 99.8 | 99.5 | 99.1 | 98.7 | 98.3 | 97.9 | 97.4 | 96.8 | 96.1 | 95.5 | 94.8 | 94.1 | 93.2 | 92.5 | 91.3 | 90.4 | 89.5 | 88.4 | 87.2 | 86.4 | 84.3 | ||
| 4-1/2 | 114.3 | Min. | 112.3 | 112.0 | 111.6 | 111.0 | 110.7 | 110.3 | 109.7 | 109.0 | 108.2 | 107.6 | 106.8 | 106.0 | 105.1 | 104.2 | 102.9 | 102.0 | 101.0 | 99.8 | 98.4 | 97.5 | 95.3 |
| Nom. | 112.5 | 112.2 | 111.8 | 111.4 | 111.0 | 110.6 | 110.1 | 109.5 | 108.8 | 108.2 | 107.5 | 106.8 | 105.9 | 105.2 | 104.0 | 103.1 | 102.2 | 101.1 | 99.9 | 99.1 | 97.0 | ||
| 5 | 127.0 | Min. | 125.0 | 124.7 | 124.3 | 123.7 | 123.4 | 123.0 | 122.4 | 121.7 | 120.9 | 120.3 | 119.5 | 118.7 | 117.8 | 116.9 | 115.6 | 114.7 | 113.7 | 112.5 | 111.1 | 110.2 | 108.0 |
| Nom. | 125.2 | 124.9 | 124.5 | 124.1 | 123.7 | 123.3 | 122.8 | 122.2 | 121.5 | 120.9 | 120.2 | 119.5 | 118.6 | 117.9 | 116.7 | 115.8 | 114.9 | 113.8 | 112.6 | 111.8 | 109.7 | ||