Wall thickness of a pipe is normally given in decimal part of an inch rather than as fraction or gage number. When gauge numbers is given for a pipe without reference to a system, Birmingham Wire Gauge - BWG - is implied.
Birmingham Wire Gauge is also known as Stubs' Wire Gauge, used for drill rod and tool steel wire.
| Gauge |
Birmingham Wire Gage
B.W.G.
(inches) |
| 00000 (5/0) |
0.500 |
| 0000 (4/0) |
0.454 |
| 000 (3/0) |
0.425 |
| 00 (2/0) |
0.380 |
| 0 |
0.340 |
| 1 |
0.300 |
| 2 |
0.284 |
| 3 |
0.259 |
| 4 |
0.238 |
| 5 |
0.220 |
| 6 |
0.203 |
| 7 |
0.180 |
| 8 |
0.165 |
| 9 |
0.148 |
| 10 |
0.134 |
| 11 |
0.120 |
| 12 |
0.109 |
| 13 |
0.095 |
| 14 |
0.083 |
| 15 |
0.072 |
| 16 |
0.065 |
| 17 |
0.058 |
| 18 |
0.049 |
| 19 |
0.042 |
| 20 |
0.035 |
| 21 |
0.032 |
| 22 |
0.028 |
| 23 |
0.025 |
| 24 |
0.022 |
| 25 |
0.020 |
| 26 |
0.018 |
| 27 |
0.016 |
| 28 |
0.014 |
| 29 |
0.013 |
| 30 |
0.012 |
| 31 |
0.010 |
| 32 |
0.009 |
| 33 |
0.008 |
| 34 |
0.007 |
| 35 |
0.005 |
| 36 |
0.004 |
Releated References:
Stainless Steel Tube Wire Sheet Guage
B.W.G. - Birmingham Wire Gauge
A.S.W.G. American Standard Wire Gauge
Sheet Metal Gauge Size Data
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