API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

RISK-BASED INSPECTION METHODOLOGY, PART 2, ANNEX 2.B—DETERMINATION OF CORROSION RATES 2.B-91
Table 2.B.11.6—Flow Velocity Adjustment Factor (F V ) as a Function of the Flow Velocity
Flow Velocity
m/s
ft/s
F V —Flow Velocity Factor
0.15 0.5 2.25
0.3 1 2
0.61 2 1.5
0.91 3 1
1.22 4 1
1.52 5 1
1.83 6 1
2.13 7 1
2.44 8 1
2.74 9 1.25
3.05 10 1.5
3.35 11 1.75
3.66 12 2
3.96 13 2.25
4.27 14 2.5
4.57 15 2.75
4.88 16 3
5.18 17 3.25
5.49 18 3.5
5.79 19 3.75
6.1 20 4