2
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WALLTHICKNESS |
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| Inch | mm | mm | mm | m.H2O | mm | gr/m | m |
|---|---|---|---|---|---|---|---|
| 1 | 25 | 31 | 0.6 | 6 | 65 | 300 | 20 |
| 11/4 | 32 | 39 | 0.7 | 6 | 70 | 400 | 20 |
| 11/2 | 38 | 46 | 0.9 | 6 | 78 | 470 | 20 |
| 2 | 51 | 59 | 0.9 | 6 | 100 | 615 | 20 |
| 21/2 | 63 | 72 | 0.9 | 5 | 120 | 750 | 20 |
| 3 | 76 | 85 | 0.9 | 4 | 145 | 920 | 20 |
| 31/2 | 90 | 100 | 0.9 | 3.5 | 180 | 1080 | 20 |
| 4 | 102 | 114 | 1.1 | 3 | 200 | 1250 | 20 |
| 5 | 127 | 138 | 1.1 | 2.5 | 250 | 1560 | 20 |
| 6 | 152 | 165 | 1.1 | 2 | 350 | 1850 | 20 |
| 8 | 203 | 216 | 1.1 | 1.5 | 410 | 2500 | 10 |
