不锈钢管道对照表.doc

wdDN-公称直径 Ф－外径 DN15-ф22mm，DN20-ф27mm DN25-ф34mm，DN32-ф42mm DN40-ф48mm，DN50-ф60mm DN65-ф76(73)mm，DN80-ф89mm DN100-ф114mm，DN125-ф140mm DN150-ф168mm，DN200-ф219mm DN250-ф273mm，DN300-ф324mm DN350-ф360mm，DN400-ф406mm DN450-ф457mm，DN500-ф508mm DN600-ф610mm，DN15-ф18mm，DN20-ф25mm DN25-ф32mm，DN32-ф38mm DN40-ф45mm，DN50-ф57mm DN65-ф73mm，DN80-ф89mm DN100-ф108mm，DN125-ф133mm DN150-ф159mm，DN200-ф219mm DN250-ф273mm，DN300-ф325mm DN350-ф377mm，DN400-ф426mm DN450-ф480mm，DN500-ф530mm DN600-ф630mm，DN15,DN20,DN25是外径四分管和六分管的直径 1 英寸=25.4毫米 =8英分 1/2 是 四分(4英分) DN15 3/4 是 六分(6英分) DN20 2分管 DN8 4分管 DN15 6分管 DN20 1′ DN25 1.2 DN32 1.5 DN40 2′ DN50 2.5 DN65 3′ DN80 4′ DN100 5′ DN125 6′ DN150 8′ DN200 10 DN250 12 DN300 GB/T50106-2001钢管规格及其理论重量表(1)外径 /mm壁 厚/mm0.50.60.81.01.21.41.51.61.82.02.22.52.83.03.23.5钢管理论质量/(kg/m)50.0550.0650.0830.09980.0920.1090.1420.1730.201100.1170.1390.1810.2220.260120.1420.1690.2210.2710.3200.3660.3880.410130.1830.2410.2960.3430.4000.4250.450140.1980.2600.3210.3790.4350.4620.489150.1230.2800.3450.4080.4700.4990.529160.2280.3000.3700.4380.5040.5360.568170.2430.3200.3950.4680.3590.5730.608180.2570.3390.4190.4970.5730.6100.647190.2720.3590.4440.5270.6080.6470.687200.2870.3790.4690.5560.6420.6840.7260.8080.888210.3990.4930.5860.6770.7210.7650.8520.937220.4180.5180.6160.7040.7580.8050.8970.9861.074250.4770.5920.7040.8150.8690.9231.0301.1341.2371.387280.5370.6660.7930.9180.9801.04121.1631.2821.4001.5721.740300.5760.7150.8520.9871.0541.1211.2521.3811.5081.6951.8781.997320.7640.9111.0651.1281.1991.3411.4801.6171.18192.0162.145340.8140.9711.1251.2021.2781.4291.5781.7251.9422.1542.293370.8881.0591.2291.3131.3971.5621.7261.8882.1272.3612.515380.9121.0891.2641.3501.4361.6071.7761.9422.1892.4302.5892.7462.978400.9621.1481.3331.4241.5151.6961.8742.0512.3122.5692.7372.9043.150451.091.301.5l1.611.711.922.122.322.622.913.113.303.58461.331.541.651.751.962.172.382.682.983.183.383.668481.381.6l1.721.832.052.272.482.813.123.333.543.84501.441.681.791.912.142.372,592.933.263.483.694.0l尺寸外径ＤＮ对照表：规格外径mm壁厚mm最小壁厚mm焊管(6米定尺)镀锌管(6米定尺)公称内径英寸米重kg根重kg米重kg根重kgDN151/221.32.82.45DN203/426.92.82.451.669.961.7610.56DN25133.73.22.82.4114.462.55415.32DN321.2542.43.53.063.3620.163.5621.36DN401.548.33.53.063.8723.224.1024.60DN50260.33.83.3255.2931.745.60733.64DN652.576.14.03.57.1142.667.53645.21DN80388.94.08.3850.288.8853.28DN1004114.34.010.8865.2811.5369.18DN12551404.515.0490.2415.94298.65DN1506168.34.518.18109.0819.27115.62DN2008219.16.0(焊管)31.53189.18DN2008219.16.5(热镀锌)36.12216.7 公称口径无缝管尺寸公称口径无缝管尺寸DN10Φ14*2DN200Φ219*5(6)DN15Φ18*2DN250Φ273*6(7,8)DN20Φ25*2(2.5)DN300Φ325*6(7,8)DN25Φ32*3DN350Φ377*8(9,10)DN32Φ38*3DN400Φ426*8(9,10)DN40Φ45*3(3.5)DN450Φ480*8(9,10)DN50Φ57*3(3.5)DN500Φ530*8(9,10)DN65Φ76*4DN600Φ630*8(9,10)DN80Φ89*4DN700Φ720*10DN100Φ108*4DN800Φ820*10DN125Φ133*4(5)DN900Φ920*10DN150Φ159*4(5,6)DN1000Φ1020*10一般来说，管子的直径可分为外径、内径、公称直径。

管材为无缝钢管的管子的1吋=25.4二、吋 是公称直径的英制叫法换算成毫米也只能是公称直径的国际公制叫法,不能对应外径,因为统一公称直径的管子另有巨细口径之分三、在管道的规格上没有绝对的换算公式,对小于100只能以 1吋=25 来模糊计较,取其相近的数,对大于100的管子用1吋=25可以纯粹匹配计较常用的如下:公称直径DN6 对应的俗称 1分公称直径DN8 对应的俗称 2分公称直径DN10 对应的俗称 3分公称直径DN15 对应的俗称 4分公称直径DN20 对应的俗称 6分公称直径DN25 对应的俗称 1吋公称直径DN32 对应的俗称 1吋2分公称直径DN40 对应的俗称 1吋半公称直径DN50 对应的俗称 2吋公称直径DN65 对应的俗称 2吋半公称直径DN80 对应的俗称 3吋公称直径DN100 对应的俗称 4吋公称直径DN125 对应的俗称 5吋公称直径DN150 对应的俗称 6吋公称直径DN200 对应的俗称 8吋公称直径DN250 对应的俗称 10吋公称直径DN300 对应的俗称 12吋公称直径DN350 对应的俗称 14吋公称直径DN400 对应的俗称 16吋公称直径DN450 对应的俗称 18吋公称直径DN500 对应的俗称 20吋公称直径DN600 对应的俗称 24吋1 英寸=25.4毫米 =8英分1/2 是 四分(4英分) DN15=1.27cm3/4 是 六分(6英分) DN20=1.905cm1、DN就是指的公称直径2、fai是指的外径3、在一个标准,不异质料的管子外径不异(也就是说对应一个外径)4、公称直径是对有缝钢管、铸铁管、混凝土管等管子的标称,无缝钢管不消此暗示法。