主蒸汽管径计算

单位高压蒸汽计算次高压蒸汽计算中压蒸汽计算工作压力MPa9.853.82工作温度℃540490450计算压力MPa10.295.254.011计算温度℃545495455比体积m3/kg0.03420.06450.0803流量t/h15015075管道外径mm219.00273.00219.00管道选用壁厚mm18.0011.0011.00管道内径mm183.00251.00197.00流速m/s54.1754.3454.88流速判定流速正合适流速正合适流速正合适钢材型号12Cr1MoVG15CrMoG20G钢材许用应力MPa7211255许用应力修正系数111温度修正系数0.70.50.4附加厚度mm132管道理论壁厚mm15.239.259.76直管壁厚允许偏差mm0.110.110.11直管最小壁厚mm16.9010.2710.83管壁厚度判定强度满足强度满足强度满足中压蒸汽计算2.63502.733550.1009100325.0010.00305.0038.35流速低,请减小管径15CrMoG12310.436.570.117.30强度满足