球墨铸铁管理论重量计算方法公称直径外径壁厚承口凸部 近似重量球铁管每 米重量标准工作 长度总重每公里用 管数每公里敷 设重量DN(mm)DN(mm)(mm)kg（直管部分）kg量Kg(L=6000mm)（根）（吨）80 :986r 3.412.276.5167r 12.77:10011864.315.19516715.865150:1706r 7.122.8144167:20.0482002206.310.330.619416732.398250:2746.8P 14.240.225516742.5853003267.218.650.832316753.941350:3787.7P 23.763.2403167:67.3014004298.129.375.548216780.48445014808.6r 38.389.3574167P 95.858500532942.8104.3669167111.723600 :6359.9:59.3137.3882