不同介质管道流速的确定.docx

介质管道种类及条件流速(ms)饱和蒸汽Dg>20030-40Dg=200-10025-35Dg<1OO15-30低压蒸汽P<1Mpa（八）15-20中压蒸汽P=1-4Mpa（八）20-40高压蒸汽P=412Mpa（八）40-60过热蒸汽Dg>20040-60Dg=20010030-50Dg<1OO2040二次蒸汽：利用时15-30不利用时60乏气排气管：从受压容器排出80从无压容器排出15-30高压乏80-100气真空510P0.3Mpa(G)812压缩气P=0.30.6Mpa(G)10-20P=0.61Mpa(G)10-15体P=12Mpa(G)812P=13Mpa(G)86P=330Mpa(G)0.5-3P=00.05Mpa(G)5.0-10P=0.050.6Mpa(G)78氧气P=0.6-1Mpa(G)46P=12Mpa(G)P=23Mpa(G)3.04.0管路长50100米煤气P200毫米汞柱0.75-3P2000毫米汞柱812P6000毫米汞柱312半水煤气P=0.1-0.15Mpa(G)10-15天然气30烟道气烟道内36管路内34氮气P=510Mpa（八）25变换气P=0.12Mpa（八）10-15氢氮混合气P=2030Mpa（八）5-10P=真空15-25氨气P<0.3Mpa(G)815P<0.6Mpa(G)10-20P2Mpa(G)38水及粘P=0.10.3Mpa(G)0.5-2度P1Mpa(G)0.5-3相似液P8Mpa(G)23体P2030Mpa(G)2-3.5热网循环水、冷却水0.5-1压力回水0.5-2无压回水0.51.2自来水主管P=Mpa(G)1.53.5支管P=MPa(G)1-1.5锅炉给水P>0.8Mpa(G)>3.0蒸气冷凝水0.5-1.5冷凝水自流0.20.5过热水2油及相似液体0.5-2粘度50厘泊Dg250.50.9油及粘Dg500.71.0度大的DgWO1.01.6液体粘度IOo厘泊Dg250.30.6Dg500.50.7DgWO0.71.0Dg2001.21.6粘度IoOO厘泊Dg250.10.2Dg500.16-0.25DgWO0.25-0.35Dg2000.35-0.55P=真空0.050.3液氨P0.6Mpa(G)0.30.8P2Mpa(G)0.81.5排出废水0.40.8泥状混合物浓度：15%2.5-325%3465%2.5-3鼓风机吸入管10-15气体鼓风机排出管15-20压缩机吸入管10-20压缩机排出管P<1Mpa810P=110Mpa10-20P>10Mpa812往复式真空泵吸入管13-16往复式真空泵排出管25-30油封式真空泵吸人管10-13往复泵吸入管0.5-1.5往复泉排出管12离心泵吸入管（常温）1.5-2水及粘离心泵吸入管（70110.5-1.5度相似0oC)%o液体离心泵排出管1.5-3高压离心泵排出管3-3.5齿轮泵吸入管1齿轮泵排出管12氨气<8