钢管公称直径对照表

-.z.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,垫片等构造尺寸,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,说明*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.

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7.920.31241.6628.008219.1STD-408.180.32242.9828.888219.1

8.740.34445.8030.788219.1

9.530.37549.7533.438219.16010.310.40653.6236.038219.1

11.130.43857.6638.758219.1*S-8012.700.50065.3043.888219.1

14.270.56272.8148.938219.110015.090.59476.6951.538219.1

15.880.62580.3154.028219.112018.260.71991.3661.398219.1

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4.780.18831.9421.4610273.0

5.160.20334.4323.1410273.0

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7.090.27946.9731.5610273.0307.800.30751.5334.6310273.0

8.740.34457.3438.6610273.0STD-409.270.36560.9040.9210273.0

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20.620.812129.6487.1110273.012021.440.844134.3590.2810273.0

22.230.875138.8793.3210273.0

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7.140.28156.3237.8512323.8

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8.740.34468.6046.1012323.8STD9.530.37574.6150.1312323.84010.310.40680.5154.1012323.8

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19.050.75014.6297.1812323.8

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8.740.34475.5250.7514355.6STD-309.530.37582.1655.2114355.6

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7.140.28171.0147.7216406.4207.920.31278.6252.8316406.4

8.740.34486.5858.1816406.4STD-309.530.35794.2163.3116406.4

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17.480.688169.35113.8016406.4

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8.740.34497.5965.5818457STD9.530.375106.2371.3818457

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25.401.000273.08183.5018457

26.971.062288.91194.1418457

28.581.125305.01204.961845710029.361.156312.76210.1618457

30.181.188320.88215.6218457

31.751.250336.33226.001845712034.931.375367.25246.781845714039.671.562412.40277.121845716045.241.781464.03311.8120508

8.740.344108.7073.0420508STD-209.530.375118.3379.5120508

10.310.406127.8285.8920508

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14.270.562175.51117.94205084015.090.594185.28124.5020508

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17.480.688213.59143.5320508

19.050.750232.03155.92205086020.620.812250.34168.2220508

25.401.000305.35205191.031314.33211.2220508

30.181.188359.22241.3820508

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8.740.344119.8080.522559STD-209.530.375130.4487.6522559*S-3012.700.500172.83116.1422559

15.880.625214.84144.3722559

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20.620.812276.54185.8324610

8.740.344130.9087.9624610STD-209.530.375142.5595.7924610*S12.700.500188.96126.98246103014.270.562211.76142.3024610

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19.050.750280.43188.4424610

20.620.812302.73203.42246106024.610.969358.87241.1524610

25.401.000369.89248.5524610

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