鋼管外徑(英制-公制)和公稱直徑

1、A系列為國(guó)際通用系列（俗稱英制管）B系列為國(guó)內(nèi)沿用系列（俗稱公制管）（mm）公稱直徑鋼管外徑A系列（英制管）B系列（公制管）DN1017.214DN1521.318DN2026.925DN2533.732DN3242.438DN4048.345DN5060.357DN6576.176DN8088.989DN100114.3108DN125139.7133DN150168.3159DN200219.1219DN250273273DN300323.9325DN350355.6377DN400406.4426DN450457480DN5005081530DN600610630DN700711720D

2、N800813820DN900914920DN100010161020DN120012191220DN140014221420DN160016261620DN180018291820DN2000203220201分=1/8寸=DN62分=1/4寸=DN83分=3/8寸=口W04分=1/2寸=DN156分=3/4寸=DN208分=1寸=DN251英寸=25.4毫米4分管，是以英制尺寸來表示的，也就是4英分管。英制尺寸的表示方法為:1英尺（1）=12英寸（12）1英寸=8英分。英分用1/8,1/4,3/8,1/2,5/8,3/4,7/8表示。1英分=125英絲1英寸=1000英絲（三）英制尺寸換成

3、米制”尺寸1英寸=25.4毫米，即是米制尺寸如：5/8X25.4=15.8755/16X25.4=7.9384分管也是1/2X25.4=12.7mm6分管34-管道公稱直徑近似19mm1寸管1-管道公稱直徑近似25.4mm（注：寸用”表示，常用的Rc1/2即是1/2寸）公稱直徑對(duì)應(yīng)（DNA系列英制）鋼管外徑（單位：mm）NPS（NominalPipeSize）（in）（相STDN無單位）（注：相當(dāng)于英寸）DN（單位：mm）（注：1英寸=25.4mm1/21521.33/42026.912533.711/43242.411/24048.325060.321/26576.1138088.94100

4、114.35125139.76150168.38200219.110250273.012300323.914350355.616400406.41845045720500508225505592460061026650660287007113075076013280081334850864369009143895096540100010164210501067441100111846115011684812001219501250127052130013215413501372561400142258145014736015001524公制-英制MetrictoImperialUnits長(zhǎng)度(

5、length)?1centimetre(cm)厘米=0.394inch(in)英寸?1metre(m)米=3.28foot(ft)英尺?1metre(m)米=1.09yard(yd)碼?1kilometre(km)公里=4.97furlong(fur)浪?1kilometre(km)公里=0.621mile英里重量（MasS）?1gram(g)克=0.03527ounce(oz)盎司?1kilogram(kg)千克=2.20pound(Ib)磅?1kilogram(kg)千克=0.157stone石?1tonne(t)噸=0.984ton噸回積（Area）2、?1squarecentimete

6、r(cm)平方厘米=0.155squareinch(in)平力英寸?1squarecentimeter(cm2)平方厘米=10.8squarefoot(ft)平方英尺?1squarecentimeter(cm2)平方厘米=1.20squareyard(yd2)平方碼?1hectare(ha)公頃=2.47acre（ac）平方英尺二英山?1squarekilometer(km2)平方公里=0.386squaremile平方英里體積(Volume)3、?1cubiccentimeter(cm)乂方厘米=0.0610cubicinch(in3)立方英寸3、?1cubiccentimeter(cm)乂

7、方厘米=35.3cubicfoot(ft)立方英尺3?1cubiccentimeter(cm)乂方厘米3=0.765cubicyard(yd)乂方碼?1cubiccentimeter(cm)立方厘米=27.5bushel(bus)蒲式耳容積(液體)Volume(fluids)?1milliliter(ml)毫升=0.0352fluidounce(floz)液體盎司?1milliliter(ml)毫升=1.76pint(pt)品脫?1litre(l)升=220gallon(gal)力口侖力(Force)?1磅力Newton(N)牛頓=0.2251pound-force(1bf)?1ton-for

8、ce(tonf)噸力=9.96kilomiewton(kN)千牛頓?英制-公制ImperialtoMetricUnits長(zhǎng)度(length)?1inch(in)英寸=25.4millimetre(mm)毫米?1foot(ft)英尺=30.5centimetre(cm)厘米?1yard(yd)碼=0.914metre(m)米?1furlong(fur)浪=201metre(m)米?1mile英里=1.61kilometre(km)公里重量(MasS)?1ounce(oz)盎司=28.3gram(g)克?1pound(Ib)磅=454gram(g)克?1stone石=6.35kilogram(kg

9、)千克?1ton噸=1.02tonne(t)噸面積(Area)?1squareinch(in2)平方英寸=6.45squarecentimeter(cm2)平方厘米?1squarefoot(ft2)平方英尺=929squarecentimeter(cm2)平方厘米?1squareyard(yd2)平方碼=0.836squaremeter(m2)平方米?1acre(ac)平方英尺二英畝=0.405hectare(ha)公頃?1squaremile平方英里=2.59squarekilometer(km2)平方公里體積(Volume)?1cubicinch(in3)立方英寸=16.4cubiccentimeter(cm3)立方厘米?1cubicfoot(ft3)立方英尺=0.0283cubicmetre(m3)立方米?1cubicyard(yd3)立方碼=0.765(m3)立方米?1bushel(bus)蒲式耳=0.34(m3)立方米容積(液體)Volume(fluids)?1fluidounce(floz)液體盎司=28.4milliliter(m1