【文档说明】不同介质管道流速的确定.docx，共(6)页，16.398 KB，由小魏子文库上传

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介质管道种类及条件流速(m/s)饱和蒸汽Dg>20030~40Dg=200~10025~35Dg<10015~30低压蒸汽P<1Mpa(A)15~20中压蒸汽P=1~4Mpa(A)20~40高压蒸汽P=4~12Mpa

(A)40~60过热蒸汽Dg>20040~60Dg=200~10030~50Dg<10020~40二次蒸汽：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高压乏气80~100压缩气体真空5~10P≤0.3Mpa(G)8~12P=0.3~0.6Mpa(G)10

~20P=0.6~1Mpa(G)10~15P=1~2Mpa(G)8~12P=1~3Mpa(G)8~6P=3~30Mpa(G)0.5~3氧气P=0~0.05Mpa(G)5.0~10P=0.05~0.6Mpa(G)7~8P=0.6~1Mpa(G)4~6P=1~2Mpa(G)P=2~3Mpa(G

)3.0~4.0煤气管路长50~100米P≤200毫米汞柱0.75~3P≤2000毫米汞柱8~12P≤6000毫米汞柱3~12半水煤气P=0.1~0.15Mpa(G)10~15天然气30烟道气烟道内3~6管路内3~4氮气P=5~10Mpa(A)2~5变换气P=0.1~2M

pa(A)10~15氢氮混合气P=20~30Mpa(A)5~10氨气P=真空15~25P<0.3Mpa(G)8~15P<0.6Mpa(G)10~20P≤2Mpa(G)3~8水及粘度相似液体P=0.1~0.3Mpa(G)0.5~2P≤

1Mpa(G)0.5~3P≤8Mpa(G)2~3P≤20~30Mpa(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0.5~1.2自来水主管P=Mpa(G)1.5~3.5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0.2~0.5过热水2油及粘度大的液体油及相似液体0.5~2粘度50厘泊Dg250.5~0.9Dg500.7~1.0Dg1001.0~1.6粘度100厘泊Dg250.3~0.6Dg500.5~0.7Dg1000.7~1.0

Dg2001.2~1.6粘度1000厘泊Dg250.1~0.2Dg500.16~0.25Dg1000.25~0.35Dg2000.35~0.55液氨P=真空0.05~0.3P≤0.6Mpa(G)0.3~0.8P≤2Mpa(G)0.8~1.5

排出废水0.4~0.8泥状混合物浓度：15%2.5~325%3~465%2.5~3气体鼓风机吸入管10~15鼓风机排出管15~20压缩机吸入管10~20压缩机排出管P<1Mpa8~10P=1~10Mpa10~20P>10Mpa8~12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水及粘度相似液体往复泵吸入管0.5~1.5往复泉排出管1~2离心泵吸入管(常温)1.5~2离心泵吸入管(70~110℃)%。0.5~1.5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1~2氨气<8