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-93
Table 2.B.11.7M—Cooling Water Corrosion Estimated Corrosion Rate for Carbon and Low Alloy
Steels in Seawater as a Function of Flow Velocity
Flow Velocity (m/s)
Corrosion Rate (mm/y)
0 0.13
0.3 0.22
0.61 0.3
0.91 0.38
1.22 0.44
1.52 0.51
1.83 0.56
2.13 0.61
2.44 0.66
2.74 0.7
3.05 0.74
3.35 0.77
3.66 0.8
3.96 0.83
4.27 0.86
4.57 0.88
4.88 0.9
5.18 0.92
5.49 0.94
5.79 0.97