常用钢管规格及用途管径应以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)表示；3钢筋混凝土（或混凝土）管、陶土管、耐酸陶瓷管、缸瓦管等管材，管径宜以内径d表示；4塑料管材，管径宜按产品标准的方法表示：当设计均用公称直径DN表示管径时，应有公称直径DN与相应产品规格对照表。建筑排水用硬聚氯乙烯管材规格用de（公称外径）×e（公称壁厚）表示（GB5836.1-92）给水用聚丙烯（PP）管材规格用de×e表示（公称外径×壁厚）公英制单位换算1英寸=25.4毫米=8英分1/2是四分(4英分)DN153/4是六分(6英分)DN202分管DN84分管DN156分管DN201′DN251.2′DN321.5′DN402′DN502.5′DN653′DN804′DN1005′DN1256′DN1508′DN20010′DN25012′DN300钢管每米理论重量计算公式：W=3.1416*ρδ（D—δ）/1000W——钢管每米理论重量kg/m；ρ——钢的密度kg/dm-3；7.81、7.85、7.91D——钢管的公称外径mm；δ——钢管的公称壁厚mm；常用规格外径mm壁厚（mm）2.53.03.54.04.55.06.07.08.09.010.012.0理论重量（公斤／米）12141820253238424557607376891021081141331400.5860.7090.9561.081.391.762.192.442.623.363.554.354.535.336.136.500.6660.811.111.261.632.152.592.893.114.004.225.185.406.367.327.770.7340.911.251.421.862.462.983.353.584.624.886.006.267.388.509.020.7890.991.381.582.072.763.353.754.045.235.526.817.108.389.6710.2610.4812.7313.42--1.501.722.283.053.724.16.4.495.836.167.607.939.3810.8211.4912.1514.2615.07--1.601.852.473.334.074.564.936.416.788.388.7510.3611.9612.7013.4415.7816.65---2.072.813.854.745.335.777.557.999.9110.3612.2814.2115.0915.9818.7919.83----3.114.325.356.046.568.639.1511.3911.9114.1616.4017.4418.4721.7522.96-----4.475.956.717.309.6710.2612.8213.1215.9818.5519.7320.9124.6626.04-------7.327.9910.6511.3214.2114.3717.7620.6421.9723.3127.5229.08----------------25.5630.3332.06----------------30.1935.8137.8815916821924527332537742648053017.1518.9920.1022.6423.9731.5226.2427.7936.6041.0945.9229.7931.5741.6346.7652.2862.5433.2935.2946.6152.3858.6070.1481.6892.55104.54115.6236.7538.9751.5457.9564.8677.6890.51102.59115.90128.2343.5046.1761.2668.9577.2492.63108.02122.52139.49154.29用途产品类别主要材质执行标准用途规格范围合金管12Cr1MoVP22(10CrMo910)T91、P91、P9、T9、WB36、Cr5Mo(P5、STFA25、T5、)、15CrMo(P11、P12、STFA22)13CrMo44DIN17175-79JISG3467-88JISG3458-88GB5310-95GB9948-88ASTMA335/A335mASTMA213/A213m石油、化工、电力、锅炉行业的耐高温、耐低温、耐腐蚀用无缝钢管∮16-824×2-100高压锅炉管20G、A106cST45.8/3GB5310-95ASTMA106-99DIN17175-79高压锅炉用耐热无缝钢管∮16-824×2-65低中压锅炉管10、20GB3087-1999低中压锅炉过热用管、沸水管、机车大小烟管∮10-530×2-40流体管20、Q345GB/T8163-1999流体输送∮8-630×1.5-75结构管10、20、35、45、16Mn、Q345BGB/T8162-1999一般结构用∮6-610×1-70石油裂化管2012CrMo15CrMoGB9948-88石油炼精厂的炉管、热交换管、管道用无缝管∮10.530×1.5-40化肥设备用高压无缝管20、16Mn、Q345GB6479-2000化肥设备、管道∮25-426×6-40液压支柱管27SiMnGB/T17396-1998液压支架液压支柱∮70-377×4-40船用管410GB/T5312-1999制造船舶专用耐压管、锅炉及过热器用管∮14-426*1.5-60管线管B级API石油、天然气工业输送气、水、油∮60-630×1.53-40
