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

2.B-46 API RECOMMENDED PRACTICE 581
Table 2.B.5.2—H 2 SO 4 Corrosion—Estimated Corrosion Rate for Carbon Steel (mpy) (Continued)
Acid
Conc
(wt%)
Acid
Temp
(°F)
Acid Velocity (ft/s)
0 0.30 0.61 0.91 1.37 1.98 2.59 3.51 3.66
42 10 15 20 25 130 170 220 280 350
72.5
59.5 15 30 50 100 490 650 810 999 999
91 25 50 100 200 980 999 999 999 999
122.5 50 100 250 800 999 999 999 999 999
42 20 30 40 60 280 370 460 600 740
67
59.5 30 50 100 170 830 999 999 999 999
91 50 100 180 300 999 999 999 999 999
122.5 100 200 400 999 999 999 999 999 999
42 75 85 100 120 570 760 950 999 999
62
59.5 120 170 250 400 999 999 999 999 999
91 200 300 600 900 999 999 999 999 999
122.5 500 750 999 999 999 999 999 999 999