英制公制尺寸转换.doc

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1、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相当于无缝管普厚/加厚mm＂mmmmmmmm154分2

2、1.25152.75/3.2522206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75.5703.75/4.57680388.5804/4.758910041141064/5.010812551401315/5.513315061651565/5.515920082192076219250102732597273300123253098435

3、35014377　948540016426　953545018478　959050020529　964060024630　1075570028720　1086080032820　　975国际管道尺寸对照表N.DINCHSTANDARDMETRICINCHCOPPERPVCPEDUCTILE15A1/2"21.7   2021.5-22.02220A3/4"27.2/28.5   2627.0-27.62625A1"34.03028.24303234.0-34.73432A1-1/4"42.7383

4、4.59353842.0-42.84840A1-1/2"48.644.540.95454848.0-48.96050A2"60.657.054.05556060.0-61.17665A2-1/2"76.376.166.75707676.0-77.38980A3"89.188.979.85858989.0-90.59890A3-1/2"101.6      100A4"114.3108.0106.27110114114.0-115.9118125A5"139.8133.0131.6714014014

5、0.0-142.3144150A6"165.2159.0157.68160165165.0-167.6170200A8"216.3219.0208.48 216216.0-218.8222250A10"267.4267.0260.50 267267.0-270.1274300A12"318.5323.9312.11 318318.0-321.3326350A14"355.6368.0363.72   378400A16"406.4419.0414.52   429450A18"457.2457.2

6、465.32   480500A20"508.0508.0516.94   532550A22"558.8558.0567.74    600A24"609.6619.0619.35   635650A26"660.4      700A28"711.2