Thomas C. Wilson Tube Tools
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BOILER TUBE EXPANDERS

REFERENCE CHART

Tube Wall Thickness of Wall in Birmingham Wire Gauge


GA 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Inch .028 .032 .035 .042 .049 .058 .065 .072 .083 .095 .109 .120 .134 .148 .165 .180 .203 .220 .238 .259 .284 .300 .340
mm .7 .8 .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