PIPE SIZE METRIC CONVERSION
Pipes are fabricated following different standards and dimensions. While some standards are following metric system others are following imperial units. Here are few pipes dimensions equivalence where internal diameter (nominal diameter or nominal bore) is used as base. Producer specification is to be used to find out nominal pressure
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PIPE SIZE METRIC CONVERSION TABLE |
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DIAMETER |
DIAMETER |
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| NOMINAL SIZE | OD | NOMINAL SIZE | OD | ||||
| mm | Inches | mm | Inches | mm | Inches | mm | Inches |
| 3 | 1/8 | 10.3 | .405 | 32 | 1 1/4 | 42.2 | 1.660 |
| 6 | 1/4 | 13.7 | .540 | 40 | 1 1/2 | 48.3 | 1.900 |
| 10 | 3/8 | 17.1 | .675 | 50 | 2 | 60.3 | 2.375 |
| 13 | 1/2 | 21.3 | .840 | 65 | 1 1/2 | 73.0 | 2.875 |
| 19 | 3/4 | 26.7 | 1.050 | 80 | 3 | 88.9 | 3.500 |
| 25 | 1 | 33.4 | 1.315 | 90 | 3 1/2 | 101.6 | 4.000 |
| mm | Inches | mm | Inches | mm | Inches | mm | Inches |
| 100 | 4 | 114.3 | 4.500 | 350 | 14 | 355.6 | 14.000 |
| 125 | 5 | 141.3 | 5.563 | 400 | 16 | 406.4 | 16.000 |
| 150 | 6 | 168.3 | 6.625 | 460 | 18 | 457.2 | 18.000 |
| 200 | 8 | 219.1 | 8.625 | 510 | 20 | 508.0 | 20.000 |
| 250 | 10 | 273.0 | 10.750 | 560 | 22 | 558.8 | 22.000 |
| 300 | 12 | 323.8 | 12.750 | 600 | 24 | 609.6 | 24.000 |
| 650 | 26 | 660.4 | 26.000 | ||||
