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-47
Table 2.B.5.2M—H 2 SO 4 Corrosion—Estimated Corrosion Rate for Carbon Steel (mm/y)
Acid
Conc
(wt%)
Acid
Temp
(°C)
Acid Velocity (m/s)
0 1 2 3 4.5 6.5 8.5 11.5 12
6 0.13 0.18 0.23 0.3 1.14 1.52 1.91 2.41 3.05
100
15 0.3 0.36 0.43 0.51 1.65 2.16 2.79 3.56 4.32
33 1.27 1.4 1.52 1.78 6.86 9.14 11.43 14.73 18.29
50 2.54 3.81 5.08 7.62 25.37 25.37 25.37 25.37 25.37
6 0.1 0.15 0.2 0.25 0.89 1.14 1.52 1.91 2.29
98
15 0.13 0.25 0.38 0.51 2.03 2.79 3.56 4.57 5.59
33 0.38 0.64 1.02 1.52 7.37 9.91 12.45 16.26 19.81
50 1.02 2.03 3.05 6.35 25.37 25.37 25.37 25.37 25.37
6 0.2 0.25 0.3 0.38 1.52 2.03 2.79 3.3 4.06
96
15 0.38 0.51 0.64 1.02 4.32 5.59 6.86 8.89 10.92
33 0.64 1.02 1.52 2.54 12.7 16.51 20.83 25.37 25.37
50 1.27 2.54 5.08 12.7 25.37 25.37 25.37 25.37 25.37
6 0.25 0.38 0.51 0.64 3.05 4.06 5.08 6.6 8.38
93.5
15 0.51 0.64 1.02 1.78 8.64 11.43 14.48 18.8 23.11
33 0.76 1.02 1.91 3.3 16.26 21.59 25.37 25.37 25.37
50 1.52 3.05 6.35 15.24 25.37 25.37 25.37 25.37 25.37
6 0.38 0.64 1.14 1.78 8.13 10.92 13.72 18.03 22.1
91
15 0.64 1.02 2.03 3.05 17.78 23.88 25.37 25.37 25.37
33 0.89 1.52 2.54 5.08 23.88 25.37 25.37 25.37 25.37
50 1.78 3.81 7.62 20.32 25.37 25.37 25.37 25.37 25.37
6 0.51 0.76 1.27 2.03 9.65 12.7 16 20.57 25.37
87
15 0.76 4.06 7.62 10.67 17.53 23.37 25.37 25.37 25.37
33 1.14 11.43 21.59 25.37 25.37 25.37 25.37 25.37 25.37
50 2.03 25.37 25.37 25.37 25.37 25.37 25.37 25.37 25.37
6 0.51 0.64 0.89 1.14 5.33 7.11 8.89 11.68 14.48
83
15 0.76 1.27 2.54 3.81 17.27 23.11 25.37 25.37 25.37
33 1.02 2.54 5.08 10.16 25.37 25.37 25.37 25.37 25.37
50 2.03 5.08 10.16 25.37 25.37 25.37 25.37 25.37 25.37
6 0.38 0.51 0.51 0.64 2.79 3.81 4.83 6.35 7.62
78
15 0.51 1.02 1.78 3.05 14.48 19.3 24.13 25.37 25.37
33 0.76 1.52 3.05 6.35 25.37 25.37 25.37 25.37 25.37
50 1.52 3.05 7.62 22.86 25.37 25.37 25.37 25.37 25.37