流量 流速
m3/h m/s
通徑mm

0.01
（小）

1

2

3

4

5

10

10

0.0028

0.2827

0.5655

0.8482

1.1310

1.4137

2.8270

15

0.0064

0.6362

1.2723

1.9085

2.5447

3.1809

6.362

20

0.0113

1.1310

2.2619

3.3929

4.5239

5.6549

11.310

25

0.0177

1.7671

3.5343

5.3014

7.0686

8.8357

17.671

40

0.0452

4.5329

9.0478

13.5717

18.0956

22.6195

45.239

50

0.0707

7.0686

14.1327

21.2058

28.2743

35.3429

70.686

65

0.1195

11.9459

23.8918

35.8377

47.7836

59.7295

119.459

80

0.1810

18.0956

36.1911

54.2867

72.3823

90.4779

180.956

100

0.2827

28.2743

56.5487

84.8230

113.0973

141.3717

282.743

150

0.6362

63.6173

127.2345

190.8518

254.4690

318.0863

636.173

200

1.1310

113.0973

226.1947

339.2920

452.3893

565.4867

1130.973

250

1.7671

176.7146

353.4292

530.1438

706.8583

883.5729

1767.146

300

2.5447

254.4690

508.9380

763.4070

1017.876

1272.245

2544.69

350

3.4636

346.3606

692.7212

1039.0818

1358.4424

1731.8030

3463.606

400

4.5239

452.3893

904.7787

1357.1680

1809.5574

2261.9467

4523.893

450

5.7256

572.5553

1145.1105

1717.6658

2290.2210

2826.7763

5725.223

500

7.0686

706.8583

1413.7167

2120.5750

2827.4334

3534.2917

7068.583

600

10.1788

1017.8760

2035.7520

3053.6281

4071.5041

5089.3801

10178.760

700

130.8544

1385.4424

2770.8847

4156.3271

5541.7694

6927.2118

13854.424

800

18.0956

1809.5574

3619.1147

5428.6721

7238.2295

9047.7868

18095.574

900

22.9022

2290.2210

4580.4421

6870.6631

9160.8842

11451.1052

22902.210

1000

28.2743

2827.4334

5654.8668

8482.3002

11309.7336

14137.1669

28274.334