介质的流速选用范围表

介质的流速选用范围表介质工作条件或管径范围流速推荐值m/s饱和蒸汽DN＜10030~15DN=100~20035~25DN＞20030~40P＜1MPa15~20P=1~4MPa20~40P=4~12MPa40~60过热蒸汽DN＜10040~20DN=100~20050~30DN＞20040~60

二次蒸汽回用时15~30不回用60高压乏汽80~100乏汽排气管，从受压容器排出80从无压容器排出15~30压缩气体真空5~10P≤0.3MPaG8~12P=0.3~0.6MPaG20~10P=0.6~1.0MPaG15~10P=1~2MPaG12~8P=2~3MPaG8~3P=3~30MPaG3~0.5氧气P=0~0.05MPaG10~5P=0.05~0.6MPaG8~6P=0.6~1MPaG6~4P=2~3MPaG4~3煤气管道长50~100m，P≤0.027MPaG3~0.75管道长50~100m，P≤0.27MPaG12~8管道长50~100m，P≤0.8MPaG12~3半水煤气P=0.1~0.15MPaG10~15天然气30烟道气烟道内3~6管道内3~4石灰窑气10~12氮气P=5~10MPaG2~5氢氮混合气P=20~30MPaG5~10氨气P=真空15~25P＜0.3MPaG8~15P＜0.6MPaG10~20P＜2MPaG3~8乙烯气体P=22~150MPaG5~6乙炔气体P＜0.01MPaG3~4P＜0.15MPaG4~8P＜2.5MPaG最大4氮气体10~25液体1.5氯仿气体10液体2氯化氢气体（钢衬胶管道）20液体（橡胶管道）1.5乙二醇2水及粘度相似的液体P=0.1~0.3MPaG0.5~2P＜1MPaG3~0.5P＜8MPaG3~2P＜20~30MPaG3.5~2自来水主管P=0.3MPaG1.5~3.5支管P=0.3MPaG1.0~1.5锅炉给水P＞0.8MPaG1.2~3.5蒸汽冷凝水0.5~1.5冷凝水自流0.2~0.5过热水2海水P＜0.6MPaG1.5~2.5油及粘度较大的液体粘度0.05Pa·sDN250.5~0.9DN500.7~1.0DN1001.0~1.6粘度0.1Pa·sDN250.3~0.6DN500.5~0.7DN1000.7~1.0DN2001.2~1.6粘度1Pa·sDN250.1~0.2DN500.16~0.25DN1000.25~0.35DN2000.35~0.55液氨P=真空0.05~0.3P≤0.6MPaG0.8~0.3P≤2MPaG1.5~0.8氢氧化钠浓度0~30%2浓度30~50%1.5浓度50~73%1.2硫酸浓度88~93%（铅管）1.293%~100%（铸铁管、钢管）1.2盐酸衬胶管1.5氯化钠带固体2~4.5物固体1.5泥状混合物浓度15%2.5~3浓度25%3~4浓度65%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＜1MPaG10~8P=1~10MPaG10~20P＞10MPaG8~12往复式真空泵吸入管13~16往复式真空泵排出管25~30油封式真空泵吸入管10~13水及粘度相似的液体往复泵吸入管0.5~1.5往复泵排出管1~2离心泵吸入管