外径￠19￠25￠32￠38￠40￠41￠51￠53￠63.5￠70￠76.1￠76.1￠85￠89￠104￠108￠114.3￠1291.20.540.710.921.101.711.50.660.871.131.351.451.471.831.911.60.700.931.211.451.531.571.972.041.80.781.041.351.621.711.752.212.292.763.053.333.733.901.151.491.791.891.942.442.543.063.383.694.134.334.965.085.285.596.631.702.052.162.222.792.903.503.874.234.744.975.695.826.426.467.293.133.263.944.364.705.335.606.416.576.837.288.184.855.294.936.227.137.307.598.059.115.816.526.847.848.038.358.8610.032.02.32.62.93.2备注:理论重量计算公式=(外径mm-厚度mm)*厚度mm*0.02507*长度M(316和316L都用这个公式)了 304和304L只要把0.02507改为0.02491
D表示外径,S表示臂厚,不锈钢管单位每米重量Kgj是：201:(D-S)*D*0.02466304:(D-S)*D*0.02491316:(D-S)*D*0.02507
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