HG20593-1997化工部-板式平焊法兰PL理论重重 公称通径DN公称压力PN-Mpa0.250.611.62.5100.360.360.610.610.61150.410.410.680.680.68200.60.60. 940.940.94250.730.731.121.121.12321.191.191.861.861.86401.381.382.122.122.12501.511.512.772.772.77651.851.853.313.313.46
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