常用风管当量直径查询表

当量直径计算公式D=2*(a*b)/a+b

边长a边长b截面积1/2周长当量直径D（m）

0.40.20.080.60.27

0.40.30.120.70.34

0.40.40.160.80.40

0.50.20.10.70.29

0.50.30.150.80.38

0.50.40.20.90.44

0.50.50.2510.50

0.60.20.120.80.30

0.60.30.180.90.40

0.60.40.2410.48

0.60.50.30 1.10.55

0.60.60.36 1.20.60

0.70.20.140.90.31

0.70.30.2110.42

0.70.40.28 1.10.51

0.70.50.35 1.20.58

0.70.60.42 1.30.65

0.70.70.49 1.40.70

0.80.20.1610.32

0.80.30.24 1.10.44

0.80.40.32 1.20.53

0.80.50.40 1.30.62

0.80.60.48 1.40.69

0.80.70.56 1.50.75

0.80.80.64 1.60.80

0.90.30.27 1.20.45

0.90.40.36 1.30.55

0.90.50.45 1.40.64

0.90.60.54 1.50.72

0.90.70.63 1.60.79

0.90.80.72 1.70.85

10.30.30 1.30.46

10.40.40 1.40.57

10.50.50 1.50.67

10.60.60 1.60.75

10.70.70 1.70.82

10.80.80 1.80.89

1.10.30.33 1.40.47

1.10.40.44 1.50.59

1.10.50.55 1.60.69

1.10.60.66 1.70.78

1.10.70.77 1.80.86

1.10.80.88 1.90.93

1.20.40.48 1.60.60

1.20.50.60 1.70.71

1.20.60.72 1.80.80

1.20.70.84 1.90.88

1.20.80.9620.96

1.30.40.52 1.70.61

1.30.50.65 1.80.72

1.30.60.78 1.90.82

1.30.70.9120.91 1.30.8 1.04

2.10.99 1.40.40.56 1.80.62 1.40.50.70 1.90.74 1.40.60.8420.84 1.40.70.98 2.10.93 1.40.8 1.12 2.2 1.02 1.50.40.60 1.90.63 1.50.50.7520.75 1.50.60.90 2.10.86 1.50.7 1.05 2.20.95 1.50.8 1.20 2.3 1.04 1.60.40.6420.64 1.60.50.80 2.10.76 1.60.60.96 2.20.87 1.60.7 1.12 2.30.97 1.60.8 1.28 2.4 1.07