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

2.B-48 API RECOMMENDED PRACTICE 581
Table 2.B.5.2M—H 2 SO 4 Corrosion—Estimated Corrosion Rate for Carbon Steel (mm/y)
(Continued)
Acid
Conc
(wt%)
Acid
Temp
(°C)
Acid Velocity (m/s)
0 0.30 0.61 0.91 1.37 1.98 2.59 3.51 3.66
6 0.25 0.38 0.51 0.64 3.3 4.32 5.59 7.11 8.89
72.5
15 0.38 0.76 1.27 2.54 12.45 16.51 20.57 25.37 25.37
33 0.64 1.27 2.54 5.08 24.89 25.37 25.37 25.37 25.37
50 1.27 2.54 6.35 20.32 25.37 25.37 25.37 25.37 25.37
6 0.51 0.76 1.02 1.52 7.11 9.4 11.68 15.24 18.8
67
15 0.76 1.27 2.54 4.32 21.08 25.37 25.37 25.37 25.37
33 1.27 2.54 4.57 7.62 25.37 25.37 25.37 25.37 25.37
50 2.54 5.08 10.16 25.37 25.37 25.37 25.37 25.37 25.37
6 1.91 2.16 2.54 3.05 14.48 19.3 24.13 25.37 25.37
62
15 3.05 4.32 6.35 10.16 25.37 25.37 25.37 25.37 25.37
33 5.08 7.62 15.24 22.86 25.37 25.37 25.37 25.37 25.37
50 12.7 19.05 25.37 25.37 25.37 25.37 25.37 25.37 25.37