钢管公称直径对照表格.doc

一般来说,管子的直径可分为外径,内径,公称直径. 无缝钢管外径用字母D来表示,其后附加外直径尺寸和壁厚.例如外径为108mm的无缝钢管,壁厚为5mm,用D108*5表示. 镀锌钢管采用DN表示. 在设计图纸中所以要用公称直径,目的是为了根据公称直径可以确定管子,管件,阀门,法兰,垫片等结构尺寸,公称尺寸用DN表示,如果在设计图纸中采用外径表示,也应该作出管道规格对照表,表明某种管道的公称直径,壁厚. 世界各国应用的标准体系虽然多,大体可分成两大类,即大外径系列和小外径系列. 大外径系列:(DN---公称直径.￠---外径)DN15---￠22mm. DN20---￠27mm. DN25---￠34mm. DN32---￠42mm. DN40---￠48mm. DN50---￠60mm. DN65---￠76(73)mm. DN80---￠89mm. DN100---￠114mm. DN125---￠140mm. DN150---￠168mm. DN200---￠219mm. DN250---￠273mm. DN300---￠324mm. DN350---￠360mm. DN400---￠406mm. DN450---￠457mm. DN500---￠508mm. DN600---￠610mm. 小外径系列: DN15---￠18mm. DN20---￠25mm. DN25---￠32mm. DN32---￠38mm. DN40---￠45mm. DN50---￠57mm. DN65---￠73mm. DN80---￠89mm. DN100---￠108mm. DN125---￠133mm. DN150---￠159mm. DN200---￠219mm. DN250---￠273mm. DN300---￠325mm. DN350---￠377mm. DN400---￠426mm. DN450---￠480mm. DN500---￠530mm. DN600---￠630mm. 一般标准钢管都可从材料表中查得每米重量. 要是非标准钢管可通过量得实际尺寸来计算其重量. 重量=(外径-壁厚)*壁厚*π*长度*7.85 重量单位---吨. 其于单位---米.钢管公称直径（英寸与毫米对照表1）外径壁厚重量英寸毫米.单位毫米.英寸.公斤/米.磅/英尺.1/810.310S1.240.0490.280.191/810.3STD-401.730.0680.370.251/810.3XS-802.410.0950.480.321/413.710S1.650.0650.500.341/413.7STD-402.240.0880.640.431/413.7XS-803.020.1190.810.553/817.110S 1.650.0650.640.433/817.1STD-402.310.0910.850.573/817.1XS-803.200.1261.110.751/221.35S1.050.0420.530.361/221.310S2.110.0831.010.681/221.3STD-402.770.1091.280.861/221.3XS-803.730.1471.631.101/221.31604.780.1881.971.331/221.3XXS7.470.2942.571.733/426.75S1.650.0651.030.693/426.710S2.110.0831.290.873/426.7STD-402.870.1131.701.143/426.7XS-803.910.1542.221.493/426.71605.560.2192.931.973/426.7XXS7.820.3083.682.48133.45S1.650.0651.310.88133.410S2.770.1092.121.42133.4STD-403.380.1332.531.70133.4XS-804.550.1793.272.18133.41606.350.2504.282.88133.4XXS9.090.3585.513.711 1/442.25S1.65 0.0651.671.121 1/442.210S2.770.1092.721.831 1/442.2STD-403.560.1403.432.311 1/442.2XS-804.850.1914.513.031 1/442.21606.350.2505.673.811 1/442.2XXS9.700.3827.855.281 1/248.35S1.650.0651.921.291 1/248.310S2.770.