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

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2.B-66 API RECOMMENDED PRACTICE 581Table 2.B.8.3M—Amine Corrosion Estimated Corrosion Rate of Carbon Steel in MDEA (≤50 wt%) (mm/y)AcidGasLoading(mol/mol)HSAS(wt%)Temperature (°C)88 93 104 116 127 132Velocity (m/s)≤6.1 >6.1 ≤6.1 >6.1 ≤6.1 >6.1 ≤6.1 >6.1 ≤6.1 >6.1 ≤6.1 >6.10.5 0.03 0.08 0.03 0.08 0.08 0.25 0.13 0.38 0.25 0.64 0.38 1.02<0.12.25 0.05 0.15 0.05 0.15 0.15 0.51 0.38 1.02 0.51 1.14 0.76 2.034.0 0.13 0.25 0.13 0.38 0.38 1.02 0.76 1.52 1.02 2.29 1.52 3.05Velocity (m/s)≤1.5 >1.5 ≤1.5 >1.5 ≤1.5 >1.5 ≤1.5 >1.5 ≤1.5 >1.5 ≤1.5 >1.50.5 0.03 0.08 0.05 0.15 0.13 0.38 0.25 0.76 0.38 1.14 0.51 1.520.152.25 0.05 0.15 0.1 0.3 0.25 0.76 0.51 1.52 0.76 2.29 1.02 2.034.0 0.13 0.38 0.2 0.64 0.51 1.52 1.02 2.03 1.52 3.05 3.05 3.810.5 0.05 0.15 0.08 0.23 0.18 0.51 0.25 0.76 0.51 1.52 0.64 1.910.252.25 0.1 0.25 0.15 0.51 0.38 1.02 0.51 1.27 1.02 2.03 1.27 2.544.0 0.2 0.64 0.38 1.14 0.76 1.52 1.02 2.03 2.03 3.05 2.54 3.810.5 0.05 0.15 0.1 0.25 0.18 0.51 0.38 1.02 0.64 1.78 0.76 2.030.352.25 0.1 0.25 0.2 0.64 0.38 1.14 0.76 1.52 1.27 2.54 2.54 3.814.0 0.2 0.64 0.38 1.02 0.89 1.78 1.52 2.54 2.54 3.56 3.81 4.570.5 0.08 0.23 0.13 0.38 0.25 0.76 0.38 1.14 0.89 1.78 1.14 2.540.452.25 0.15 0.38 0.25 0.76 0.51 1.52 1.14 2.29 1.78 3.3 2.29 3.814.0 0.25 0.76 0.51 1.02 1.02 2.03 2.29 3.05 3.05 3.81 3.81 4.570.5 0.08 0.23 0.18 0.51 0.25 0.76 0.64 1.91 1.02 2.54 1.27 3.050.552.25 0.15 0.51 0.38 1.14 0.51 1.52 1.27 2.54 2.03 3.56 2.54 3.814.0 0.25 0.76 0.76 1.52 1.14 2.29 2.54 3.81 3.56 4.57 4.06 5.080.5 0.1 0.25 0.23 0.76 0.38 1.02 0.76 2.54 1.27 3.05 1.52 3.810.652.25 0.2 0.38 0.51 1.02 0.76 1.52 1.52 2.54 2.29 3.56 2.54 3.814.0 0.38 0.89 1.02 2.03 1.52 2.54 2.54 3.81 3.56 4.57 4.06 5.080.5 0.13 0.38 0.25 0.76 0.51 1.52 1.02 2.54 1.52 3.05 1.78 3.810.72.25 0.25 0.76 0.51 1.52 1.02 2.03 1.78 3.05 2.54 3.81 3.05 3.814.0 0.51 1.14 1.02 2.03 1.52 2.54 2.54 3.81 3.81 4.57 4.32 5.59
RISK-BASED INSPECTION METHODOLOGY, PART 2, ANNEX 2.B—DETERMINATION OF CORROSION RATES 2.B-67Table 2.B.8.4—Amine Corrosion Rate Multiplier for High Amine StrengthsType of Amine Concentration (wt%) Multiplier≤20 1.0MEA21 to 25 1.5>25 2.0≤30 1.0DEA31 to 40 1.2>40 1.5MDEA ≤50 1.0Table 2.B.8.5—Amine Corrosion Estimated Corrosion Rates for Stainless Steel for All AminesAcid Gas Loading(mol/mol)mm/yTemperature≤149 °C (300 °F)mpy0.1 0.03 10.15 0.03 10.25 0.03 10.35 0.05 20.45 0.05 20.55 0.08 30.65 0.1 40.7 0.13 5
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Risk-Based Inspection MethodologyAP
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ForewordNothing contained in any AP
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CONTENTS1 SCOPE ...................
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1-2 API RECOMMENDED PRACTICE 5811.4
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PART 2PROBABILITY OF FAILURE METHOD
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5.8 Figures .......................
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12.7 Nomenclature .................
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19.6 Determination of the Damage Fa
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Risk-Based Inspection MethodologyPa
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RISK-BASED INSPECTION METHODOLOGY,
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CONTENTSTABLE 2.A.1—LEADERSHIP AN
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PART 2, ANNEX 2.BDETERMINATION OF C
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2.B.8 AMINE CORROSION .............
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CONTENTSOVERVIEW ..................
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PART 3CONSEQUENCE OF FAILURE METHOD
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4.6.5 Releases to the Environment .
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5.9.7 Determination of Final Toxic
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3-2 API RECOMMENDED PRACTICE 581[7]
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CONTENTS3.A.1 GENERAL .............
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CONTENTS1 GENERAL………………
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PART 5SPECIAL EQUIPMENT5-1
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Consequence of Failure Methodology
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API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

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