管道尺寸对照

1、、尺寸:DN15 4 分管、DN20 6 分管、DN25 1 寸管、DN32 1 寸 2 管、DN40 1 寸半管、DN502 寸管、DN65 2 寸半管、DN80 3 寸管、DN100 4 寸管、DN125 5 寸管、DN150 6 寸管、DN200 8 寸管、DN250 10 寸管等。二、把1英寸分成8等分：1/8 1/4 3/8 1/2 5/8 3/4 7/8 英寸。相当于通常说的1分管到7分管,更小的尺寸用1/16、1/32、1/64来表示，单位还是英寸。如果分母和分子 能够约分如分子是 2、4、8、16、32就应该约分。英寸的表示是在右上角打上两撇，如1/2如DN25 25mm，下同

2、的水管就是英制1的水管，也是以前的8分水管。DN15的水管就是英制1/2的水管，也是以前的 4分水管。如DN20的水管就是英制3/4的水管，也是以前的 6分水管外径与DN，NB的关系如下：公称管子尺寸NPS/in0.250.50.751.01.251.52.02.53.04.06.0公称直径DN/mm61520253240506580100150公称管子尺寸NPS/in8.010.012.014.016.018.020.024.036.042.048.0公称直径DN/mm20025030035040045050060090010001200管子规格及有关数据公称直径英寸外径近似内径壁厚普厚/加

3、厚相当于无缝管mmIImmmmmmmm154分21.25152.75/3.2522206分26.75202.75/3.525251寸33.5253.25/432321.2寸42.25323.25/438401.5寸48403.5/4.2545502寸60503.5/4.557702.5寸75.5703.75/4.57680388.5804/4.758910041141064/5.010812551401315/5.513315061651565/5.5159200821920762192501027325972733001232530984353501437794854001642695354

4、501847895905002052996406002463010755700287201086080032820975国际管道尺寸对照表N.DINCHSTANDARDMETRICINCHCOPPERPVCPEDUCTILE15A1/221.7202220A3/427.2/28.5262625A134.03028.2430323432A1-1/442.73834.5935384840A1-1/248.644.540.9545486050A260.657.054.0555607665A2-1/276.376.166.7570768980A389.188.979.8585899890A3-1/2101.6100A4114.3108.0106.27110114118125A5139.8133.0131.67140140144150A6165.2159.0157.68160165170200A8216.3219.0208.48216222250A10267.4267.0260.50267274300A12318.5323.9312.11318326350A14355.6368.0363.72378400A16406.4419.0414.52429450A18457.2457.2465.32480500A20508.0508.05