Gauge?
Gauge?
(OP)
This is just a question out of curiosity. Does anyone know how gauges for sheet metal and wire are determine? Where did these measurements originate from? I know how the gauge of a shotgun is determined but I can't find any reference for the seemingly random metal thickness. Also where do standard pipe sizes come from? Why can't a 4" pipe just have a 4" ID?





RE: Gauge?
"The United States Standard Gage for iron and steel sheets and plates was established by Congress in 1893 and was primarily a weight gage rather than a thickness gage. The equivalent thicknesses were derived from the weight of wrought iron. The weight per cubic foot was taken
at 480 pounds, thus making the weight of a plate 12 inches square and 1 inch thick, 40 pounds."
RE: Gauge?
If you measure every dimension of a piece of pipe, and none of them are 4 inches, then it's 4 inch pipe.
RE: Gauge?
So then how is it determined what 11 Ga or 7 Ga are?
MintJulep,
Thanks for the explanation, it is so clear to me now...
RE: Gauge?
RE: Gauge?
http:/
Barry1961
RE: Gauge?
RE: Gauge?
Gage # Sheet SteelĀ Strip & Tubing Aluminum Stainless Steel
6/0 ---- ---- 0.58 0.4687
5/0 ---- 0.5 0.5165 0.4375
4/0 ---- 0.454 0.46 0.4062
3/0 ---- 0.425 0.4096 0.375
2/0 ---- 0.38 0.3648 0.3437
0 ---- 0.34 0.3249 0.3125
1 ---- 0.3 0.2893 0.2812
2 ---- 0.284 0.2576 0.2656
3 0.2391 0.259 0.2294 0.25
4 0.2242 0.238 0.2043 0.2344
5 0.2092 0.22 0.1819 0.2187
6 0.1943 0.203 0.162 0.2031
7 0.1793 0.18 0.1443 0.1875
8 0.1644 0.165 0.1285 0.1719
9 0.1495 0.148 0.1144 0.1562
10 0.1345 0.134 0.1019 0.1406
11 0.1196 0.12 0.0907 0.125
12 0.1046 0.109 0.0808 0.1094
John
RE: Gauge?
RE: Gauge?
RE: Gauge?