Global water – Xylem FP111, FP211, & FP311 GLOBAL WATER FLOW PROBE Users Manual User Manual
Page 18
Global Water
800-876-1172 • globalw.com
18
Appendix A: Calculations for Partially Filled Round Pipes
B
C
B
C
0.01
0.0013
0.51
0.4027
0.02
0.0037
0.52
0.4127
0.03
0.0069
0.53
0.4227
0.04
0.0105
0.54
0.4327
H= Height of water; D= Diameter of pipe
(in feet)
0.05
0.0147
0.55
0.4426
H/D = Column B
0.06
0.0192
0.56
0.4526
0.07
0.0242
0.57
0.4625
Read Column C adjacent to your pipe’s B
0.08
0.0294
0.58
0.4723
0.09
0.0350
0.59
0.4822
C x D2 = Filled area, A (sq.ft. )
0.10
0.0409
0.60
0.4920
0.11
0.0470
0.61
0.5018
A x Average Velocity = Volumetric flow
0.12
0.0534
0.62
0.5115
(CFS)
0.13
0.0600
0.63
0.5212
0.14
0.0668
0.64
0.5308
CFS x 448.83 = Gallons/minute (GPM)
0.15
0.0739
0.65
0.5404
0.16
0.0811
0.66
0.5499
GPM x 1440 = Gallons/day (GPD)
0.17
0.0885
0.67
0.5594
0.18
0.0961
0.68
0.5687
0.19
0.1039
0.69
0.5780
0.20
0.1118
0.70
0.5872
0.21
0.1199
0.71
0.5964
0.22
0.1281
0.72
0.6054
0.23
0.1365
0.73
0.6143
0.24
0.1449
0.74
0.6231
0.25
0.1535
0.75
0.6318
0.26
0.1623
0.76
0.6404
0.27
0.1711
0.77
0.6489
0.28
0.1800
0.78
0.6573
0.29
0.1890
0.79
0.6655
0.30
0.1982
0.80
0.6736
0.31
0.2074
0.81
0.6815
0.32
0.2167
0.82
0.6893
0.33
0.2266
0.83
0.6969
0.34
0.2355
0.84
0.7043
0.35
0.2450
0.85
0.7115
0.36
0.2546
0.86
0.7186
0.37
0.2644
0.87
0.7254
0.38
0.2743
0.88
0.7320
0.39
0.2836
0.89
0.7384
0.40
0.2934
0.90
0.7445
0.41
0.3032
0.91
0.7504
0.42
0.3130
0.92
0.7560
0.43
0.3229
0.93
0.7612
0.44
0.3328
0.94
0.7662
0.45
0.3428
0.95
0.7707
0.46
0.3527
0.96
0.7749
0.47
0.3627
0.97
0.7785
0.48
0.3727
0.98
0.7816
0.49
0.3827
0.99
0.7841
0.50
0.3927
1.00
0.7854