B-5
Appendix B
TABLE B-1. Sizing Guidelines.
To convert flow rate to velocity, use the appropriate factor listed in
Table B-2 and the following equation:
TABLE B-2. Line Size vs.
Conversion Factor.
Application
Velocity Range
(ft/s)
Velocity Range
(m/s)
Normal Service 2–20 0.6–6.1
Abrasive Slurries 3–10 0.9–3.1
Non-Abrasive Slurries 5–15 1.5–4.6
Velocity =
Flow Rate
Factor
Magmeter Size: 4 inch (factor from Table B-2 = 39.679)
Normal Flow Rate: 300 gpm
Velocity =
300 (gpm)
39.679
Velocity = 7.56 ft/s
Example: English Units
Magmeter Size: 100 mm (factor from Table B-2 = 495.73)
Normal Flow Rate: 800 l/min
Velocity =
800 (l/min)
495.73
Velocity = 1.61 m/s
Example: SI Units
u
Nominal Line Size
Inches (mm)
Gallons Per
Minute Factor
Liters Per
Minute Factor
0.15 (4) 0.055 0.687
0.30 (8) 0.220 2.750
½ (15) 0.947 11.834
1 (25) 2.693 33.657
1½ (40) 6.345 79.297
2 (50) 10.459 130.67
3 (80) 23.042 287.88
4 (100) 39.679 495.73
6 (150) 90.048 1,125.0
8 (200) 155.94 1,948.3
10 (250) 245.78 3,070.7
12 (300) 352.51 4,437.2
14 (350) 421.70 5,268.8
16 (400) 550.80 6,881.5
18 (450) 697.19 8,875.7
20 (500) 866.51 10,826
24 (600) 1,253.2 15,657
30 (750) 2,006.0 25,036
36 (900) 2,935.0 36,670
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