Boiler & Condenser Tubes Reference: Inches

Thickness of Wall in Birmingham Wire Gage and in Decimal Inches
Tube20191817161514131211109876543210
ODID.035.042.049.058.065.072.083.095.109.120.134.148.165.180.203.220.238.259.284.300.340
1/2Min..422.408.392.373.357.342.318.291.260.236
Nom..430.416.402.384.370.356.334.310.282.260
5/8Min..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
3/4Min..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
7/8Min..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
1Min..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
1-1/8Min.1.0471.0331.017.997.982.967.943.916.886.861.831.800.762.729.678.641.601.555.500.465.377
Nom.1.0551.0411.0271.009.995.981.959.935.907.885.857.829.795.765.719.685.649.607.557.525.445
1-1/4Min.1.1721.1581.1421.1221.1071.0921.0681.0411.011.986.956.925.887.854.803.766.726.680.625.590.502
Nom.1.1801.1661.1521.1341.1201.1061.0841.0601.0321.010.982.954.920.890.844.810.774.732.682.650.570
1-3/8Min.1.2971.2831.2671.2471.2321.2171.1921.1661.1361.1111.0811.0491.012.979.928.891.851.805.750.715.627
Nom.1.3051.2911.2771.2591.2451.2311.2091.1851.1571.1351.1071.0791.0451.015.969.935.899.857.807.775.695
1-1/2Min.1.4221.4081.3921.3721.3571.3421.3181.2911.2601.2361.2051.1741.1371.1041.0531.016.976.930.875.840.752
Nom.1.4301.4261.4021.3841.3701.3561.3341.3101.2821.2601.2321.2041.1701.1401.0941.0601.024.982.932.900.820
1-3/4Min.1.6721.6581.6421.6221.6071.5921.5681.5411.5101.4861.4551.4241.3871.3541.3031.2661.2261.1801.1251.0901.002
Nom.1.6801.6661.6521.6341.6201.6061.5841.5601.5321.5101.4821.4541.4201.3901.3441.3101.2741.2321.1821.1501.070
2Min.1.9221.9081.8921.8721.8571.8421.8171.7911.7601.7361.7051.6741.6371.6041.5531.5161.4761.4301.3751.3401.252
Nom.1.9301.9161.9021.8841.8701.8561.8341.8101.7821.7601.7321.7041.6701.6401.5941.5601.5241.4821.4321.4001.320
2-1/4Min.2.1722.1582.1422.1222.1072.0922.0672.0412.0101.9861.9551.9241.8871.8541.8031.7661.7261.6801.6251.5901.502
Nom.2.1802.1662.1522.1342.1202.1062.0842.0602.0322.0101.9821.9541.9201.8901.8441.8101.7741.7321.6821.6501.570
2-1/2Min.2.4222.4082.3922.3722.3572.3422.3172.2912.2602.2362.2052.1742.1372.1042.0532.0161.9761.9301.8751.8401.752
Nom.2.4302.4162.4022.3842.3702.3562.3342.3102.2822.2602.2322.2042.1702.1402.0942.0602.0241.9821.9321.9001.820
2-3/4Min.2.6722.6582.6422.6222.6072.5922.5672.5412.5102.4862.4552.4242.3872.3542.3032.2662.2262.1802.1252.0902.002
Nom.2.6802.6662.6522.6342.6202.6062.5842.5602.5322.5102.4822.4542.4202.3902.3442.3102.2742.2322.1822.1502.070
3Min.2.9222.9082.8922.8722.8572.8422.8172.7912.7602.7362.7052.6742.6362.6042.5532.5162.4762.4302.3752.3402.252
Nom.2.9302.9162.9022.8842.8702.8562.8342.8102.7822.7602.7322.7042.6702.6402.5942.5602.5242.4822.4322.4002.320
3-1/4Min.3.1723.1583.1423.1223.1073.0923.0673.0413.0102.9862.9552.9242.8872.8542.8032.7662.7262.6802.6252.5902.502
Nom.3.1803.1663.1523.1343.1203.1063.0843.0603.0323.0102.9822.9542.9202.8902.8442.8102.7742.7322.6822.6502.570
3-1/2Min.3.4223.4083.3923.3723.3573.3423.3173.2913.2603.2363.2053.1743.1373.1043.0533.0162.9762.9302.8752.8402.752
Nom.3.4303.4163.4023.3843.3703.3563.3343.3103.2823.2603.2323.2043.1703.1403.0943.0603.0242.9822.9322.9002.820
3-3/4Min.3.6723.6583.6423.6223.6073.5923.5673.5413.5103.4863.4553.4243.3873.3543.3033.2663.2263.1803.1253.0903.002
Nom.3.6803.6663.6523.6343.6203.6063.5843.5603.5323.5103.4823.4543.4203.3903.3443.3103.2743.2323.1823.1503.070
4Min.3.9223.9083.8923.8723.8573.8423.8173.7913.7603.7363.7053.6743.6373.6043.5533.5163.4763.4303.3753.3403.252
Nom.3.9303.9163.9023.8843.8703.8563.8343.8103.7823.7603.7323.7043.6703.6403.5943.5603.5243.4823.4323.4003.320
4-1/2Min.4.4224.4084.3924.3724.3574.3424.3174.2914.2604.2364.2054.1744.1374.1044.0534.0163.9763.9303.8753.8403.752
Nom.4.4304.4164.4024.3844.3704.3564.3344.3104.2824.2604.2324.2044.1704.1404.0944.0604.0243.9823.9323.9003.820
5Min.4.9224.9084.8924.8724.8574.8424.8174.7914.7604.7364.7054.6744.6374.6044.5534.5164.4764.4304.3754.3404.252
Nom.4.9304.9164.9024.8844.8704.8564.8344.8104.7824.7604.7324.7044.6704.6404.5944.5604.5244.4824.4324.4004.320