常用钢管规格及用途外径mm壁厚（mm）2.53.03.54.04.55.06.07.08.09.010.012.0理论重量（公斤／米）12141820253238424557607376891021081141331401591682192452733253774264805300.5860.7090.9561.081.391.762.192.442.623.363.554.354.535.336.136.500.6660.811.111.261.632.152.592.893.114.004.225.185.406.367.327.770.7340.911.251.421.862.462.983.353.584.624.886.006.267.388.509.020.7890.991.381.582.072.763.353.754.045.235.526.817.108.389.6710.2610.4812.7313.42--1.501.722.283.053.724.16.4.495.836.167.607.939.3810.8211.4912.1514.2615.0717.15--1.601.852.473.334.074.564.936.416.788.388.7510.3611.9612.7013.4415.7816.6518.9920.10---2.072.813.854.745.335.777.557.999.9110.3612.2814.2115.0915.9818.7919.8322.6423.9731.52----3.114.325.356.046.568.639.1511.3911.9114.1616.4017.4418.4721.7522.9626.2427.7936.6041.0945.92-----4.475.956.717.309.6710.2612.8213.1215.9818.5519.7320.9124.6626.0429.7931.5741.6346.7652.2862.54-------7.327.9910.6511.3214.2114.3717.7620.6421.9723.3127.5229.0833.2935.2946.6152.3858.6070.1481.6892.55104.54115.62----------------25.5630.3332.0636.7538.9751.5457.9564.8677.6890.51102.59115.90128.23----------------30.1935.8137.8843.5046.1761.2668.9577.2492.63108.02122.52139.49154.29备注：管径应以mm为单位，管径的表达方式应符合下列规定：1水煤气输送钢管（镀锌或非镀锌）、铸铁管等管材，管径宜以公称直径DN表示；2无缝钢管、焊接钢管（直缝或螺旋缝）、铜管、不锈钢管等管材，管径宜以D×δ(外径×壁厚)