Thomas C. Wilson Tube Tools
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TUBE CLEANING

REFERENCE CHART

Boiler and Condenser Tube Sizes - Inches


Thickness of Wall in Birmingham Wire Gage and in Decimal Inches
Tube 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
OD ID .035 .042 .049 .058 .065 .072 .083 .095 .109 .120 .134 .148 .165 .180 .203 .220 .238 .259 .284 .300 .340
1/2 Min. .422 .408 .392 .373 .357 .342 .318 .291 .260 .236                      
Nom. .430 .416 .402 .384 .370 .356 .334 .310 .282 .260                      
5/8 Min. .547 .533 .517 .498 .482 .467 .443 .417 .385 .361 .330 .299 .262 .229              
Nom. .555 .541 .527 .509 .495 .481 .459 .435 .407 .385 .357 .329 .295 .265              
3/4 Min. .672 .658 .642 .623 .607 .592 .568 .542 .510 .486 .455 .424 .387 .354 .303 .266 .226 .180      
Nom. .680 .666 .652 .634 .620 .606 .584 .560 .532 .510 .482 .454 .420 .390 .344 .310 .274 .232      
7/8 Min. .797 .783 .767 .747 .732 .717 .693 .666 .636 .611 .580 .549 .512 .479 .428 .391 .351 .305      
Nom. .805 .791 .777 .759 .745 .731 .709 .685 .657 .635 .607 .579 .545 .515 .469 .435 .399 .357      
1 Min. .922 .908 .892 .873 .857 .842 .818 .791 .761 .736 .706 .675 .637 .604 .553 .516 .476 .430 .375 .340 .252
Nom. .930 .916 .902 .884 .870 .856 .834 .810 .782 .760 .732 .704 .670 .640 .594 .560 .524 .482 .432 .400 .320
1-1/8 Min. 1.047 1.033 1.017 .997 .982 .967 .943 .916 .886 .861 .831 .800 .762 .729 .678 .641 .601 .555 .500 .465 .377
Nom. 1.055 1.041 1.027 1.009 .995 .981 .959 .935 .907 .885 .857 .829 .795 .765 .719 .685 .649 .607 .557 .525 .445
1-1/4 Min. 1.172 1.158 1.142 1.122 1.107 1.092 1.068 1.041 1.011 .986 .956 .925 .887 .854 .803 .766 .726 .680 .625 .590 .502
Nom. 1.180 1.166 1.152 1.134 1.120 1.106 1.084 1.060 1.032 1.010 .982 .954 .920 .890 .844 .810 .774 .732 .682 .650 .570
1-3/8 Min. 1.297 1.283 1.267 1.247 1.232 1.217 1.192 1.166 1.136 1.111 1.081 1.049 1.012 .979 .928 .891 .851 .805 .750 .715 .627
Nom. 1.305 1.291 1.277 1.259 1.245 1.231 1.209 1.185 1.157 1.135 1.107 1.079 1.045 1.015 .969 .935 .899 .857 .807 .775 .695
1-1/2 Min. 1.422 1.408 1.392 1.372 1.357 1.342 1.318 1.291 1.260 1.236 1.205 1.174 1.137 1.104 1.053 1.016 .976 .930 .875 .840 .752
Nom. 1.430 1.426 1.402 1.384 1.370 1.356 1.334 1.310 1.282 1.260 1.232 1.204 1.170 1.140 1.094 1.060 1.024 .982 .932 .900 .820
1-3/4 Min. 1.672 1.658 1.642 1.622 1.607 1.592 1.568 1.541 1.510 1.486 1.455 1.424 1.387 1.354 1.303 1.266 1.226 1.180 1.125 1.090 1.002
Nom. 1.680 1.666 1.652 1.634 1.620 1.606 1.584 1.560 1.532 1.510 1.482 1.454 1.420 1.390 1.344 1.310 1.274 1.232 1.182 1.150 1.070
2 Min. 1.922 1.908 1.892 1.872 1.857 1.842 1.817 1.791 1.760 1.736 1.705 1.674 1.637 1.604 1.553 1.516 1.476 1.430 1.375 1.340 1.252
Nom. 1.930 1.916 1.902 1.884 1.870 1.856 1.834 1.810 1.782 1.760 1.732 1.704 1.670 1.640 1.594 1.560 1.524 1.482 1.432 1.400 1.320
2-1/4 Min. 2.172 2.158 2.142 2.122 2.107 2.092 2.067 2.041 2.010 1.986 1.955 1.924 1.887 1.854 1.803 1.766 1.726 1.680 1.625 1.590 1.502
Nom. 2.180 2.166 2.152 2.134 2.120 2.106 2.084 2.060 2.032 2.010 1.982 1.954 1.920 1.890 1.844 1.810 1.774 1.732 1.682 1.650 1.570
2-1/2 Min. 2.422 2.408 2.392 2.372 2.357 2.342 2.317 2.291 2.260 2.236 2.205 2.174 2.137 2.104 2.053 2.016 1.976 1.930 1.875 1.840 1.752
Nom. 2.430 2.416 2.402 2.384 2.370 2.356 2.334 2.310 2.282 2.260 2.232 2.204 2.170 2.140 2.094 2.060 2.024 1.982 1.932 1.900 1.820
2-3/4 Min. 2.672 2.658 2.642 2.622 2.607 2.592 2.567 2.541 2.510 2.486 2.455 2.424 2.387 2.354 2.303 2.266 2.226 2.180 2.125 2.090 2.002
Nom. 2.680 2.666 2.652 2.634 2.620 2.606 2.584 2.560 2.532 2.510 2.482 2.454 2.420 2.390 2.344 2.310 2.274 2.232 2.182 2.150 2.070
3 Min. 2.922 2.908 2.892 2.872 2.857 2.842 2.817 2.791 2.760 2.736 2.705 2.674 2.636 2.604 2.553 2.516 2.476 2.430 2.375 2.340 2.252
Nom. 2.930 2.916 2.902 2.884 2.870 2.856 2.834 2.810 2.782 2.760 2.732 2.704 2.670 2.640 2.594 2.560 2.524 2.482 2.432 2.400 2.320
3-1/4 Min. 3.172 3.158 3.142 3.122 3.107 3.092 3.067 3.041 3.010 2.986 2.955 2.924 2.887 2.854 2.803 2.766 2.726 2.680 2.625 2.590 2.502
Nom. 3.180 3.166 3.152 3.134 3.120 3.106 3.084 3.060 3.032 3.010 2.982 2.954 2.920 2.890 2.844 2.810 2.774 2.732 2.682 2.650 2.570
3-1/2 Min. 3.422 3.408 3.392 3.372 3.357 3.342 3.317 3.291 3.260 3.236 3.205 3.174 3.137 3.104 3.053 3.016 2.976 2.930 2.875 2.840 2.752
Nom. 3.430 3.416 3.402 3.384 3.370 3.356 3.334 3.310 3.282 3.260 3.232 3.204 3.170 3.140 3.094 3.060 3.024 2.982 2.932 2.900 2.820
3-3/4 Min. 3.672 3.658 3.642 3.622 3.607 3.592 3.567 3.541 3.510 3.486 3.455 3.424 3.387 3.354 3.303 3.266 3.226 3.180 3.125 3.090 3.002
Nom. 3.680 3.666 3.652 3.634 3.620 3.606 3.584 3.560 3.532 3.510 3.482 3.454 3.420 3.390 3.344 3.310 3.274 3.232 3.182 3.150 3.070
4 Min. 3.922 3.908 3.892 3.872 3.857 3.842 3.817 3.791 3.760 3.736 3.705 3.674 3.637 3.604 3.553 3.516 3.476 3.430 3.375 3.340 3.252
Nom. 3.930 3.916 3.902 3.884 3.870 3.856 3.834 3.810 3.782 3.760 3.732 3.704 3.670 3.640 3.594 3.560 3.524 3.482 3.432 3.400 3.320
4-1/2 Min. 4.422 4.408 4.392 4.372 4.357 4.342 4.317 4.291 4.260 4.236 4.205 4.174 4.137 4.104 4.053 4.016 3.976 3.930 3.875 3.840 3.752
Nom. 4.430 4.416 4.402 4.384 4.370 4.356 4.334 4.310 4.282 4.260 4.232 4.204 4.170 4.140 4.094 4.060 4.024 3.982 3.932 3.900 3.820
5 Min. 4.922 4.908 4.892 4.872 4.857 4.842 4.817 4.791 4.760 4.736 4.705 4.674 4.637 4.604 4.553 4.516 4.476 4.430 4.375 4.340 4.252
Nom. 4.930 4.916 4.902 4.884 4.870 4.856 4.834 4.810 4.782 4.760 4.732 4.704 4.670 4.640 4.594 4.560 4.524 4.482 4.432 4.400 4.320