钢管的理论重量表如下：
无缝钢管
外径（mm）: 2.5, 3.5, 4.5, 5.5, 6.5, 7.5
壁厚（mm）: 3, 4, 5, 6, 7
理论重量（kg/m）: 3.218, 2.215, 2.462, 2.763, 3.053, 3.333, 3.594, 3.854, 4.094, 4.324, 4.533, 4.745, 5.055, 5.355, 5.644, 5.942, 6.271, 6.597, 7.418, 7.854, 8.285, 8.724, 9.162, 9.682, 10.141, 10.851, 11.410, 12.151, 13.441, 14.721, 15.981, 17.231, 18.471, 19.701
镀锌钢管
外径（mm）: 0.5, 0.6, 0.8, 1.0, 1.2, 1.4, 1.5, 1.6, 1.8, 2.0, 2.2, 2.5, 2.8, 3.0, 3.2, 3.5
壁厚（mm）: 0.5
理论重量（kg/m）: 0.055, 0.065, 0.083, 0.099, 0.109, 0.128, 0.142, 0.173, 0.201, 0.222, 0.260, 0.294, 0.328, 0.367, 0.410, 0.458, 0.510, 0.566, 0.628, 0.690, 0.758, 0.832, 0.911, 0.995, 1.084, 1.177, 1.276, 1.382, 1.504
不锈钢钢管
外径（mm）: 2.5, 3.5, 4.5, 5.5, 6.5, 7.5
壁厚（mm）: 3, 4, 5, 6, 7
理论重量（kg/m）: 3.218, 2.215, 2.462, 2.763, 3.053, 3.333, 3.594, 3.854, 4.094, 4.324, 4.533, 4.745, 5.055, 5.355, 5.644, 5.942, 6.271, 6.597, 7.418, 7.854, 8.285, 8.724, 9.162, 9.682, 10.141, 10.851, 11.410, 12.151, 13.441, 14.721, 15.981, 17.231, 18.471, 19.701
焊接钢管
外径（mm）: 2.5, 3.5,