API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology
CONTENTS2.B.1 OVERVIEW ........................................................................................................................................ 12.B.1.1 Determination of Corrosion Rate ........................................................................................... 12.B.1.2 Determination of Thinning Type ............................................................................................ 12.B.1.3 Tables........................................................................................................................................ 22.B.2 HYDROCHLORIC ACID CORROSION ............................................................................................. 42.B.2.1 Description of Damage............................................................................................................ 42.B.2.2 Basic Data ................................................................................................................................ 42.B.2.3 Determination of Corrosion Rate ........................................................................................... 42.B.2.4 References ............................................................................................................................... 42.B.2.6 Figures ...................................................................................................................................... 102.B.3 HIGH TEMPERATURE SULFIDIC AND NAPHTHENIC ACID CORROSION ................................. 112.B.3.1 Description of Damage............................................................................................................ 112.B.3.2 Basic Data ................................................................................................................................ 122.B.3.3 Determination of Corrosion Rate ........................................................................................... 122.B.3.4 References ............................................................................................................................... 122.B.3.6 Figures ...................................................................................................................................... 322.B.4 HIGH TEMPERATURE H2S/H2 CORROSION ................................................................................. 332.B.4.1 Description of Damage............................................................................................................ 332.B.4.2 Basic Data ................................................................................................................................ 332.B.4.3 Determination of Corrosion Rate ........................................................................................... 332.B.4.4 References ............................................................................................................................... 332.B.4.5 Tables........................................................................................................................................ 342.B.4.6 Figures ...................................................................................................................................... 432.B.5 SULFURIC ACID CORROSION ........................................................................................................ 432.B.5.1 Description of Damage............................................................................................................ 432.B.5.2 Basic Data ................................................................................................................................ 442.B.5.3 Determination of Corrosion Rate ........................................................................................... 442.B.5.4 References ............................................................................................................................... 442.B.5.5 Tables........................................................................................................................................ 442.B.5.6 Figures ...................................................................................................................................... 542.B.6 HYDROFLUORIC ACID CORROSION ............................................................................................. 552.B.6.1 Description of Damage............................................................................................................ 552.B.6.2 Basic Data ................................................................................................................................ 552.B.6.3 Determination of Corrosion Rate ........................................................................................... 552.B.6.4 References ............................................................................................................................... 562.B.6.5 Tables........................................................................................................................................ 562.B.6.6 Figures ...................................................................................................................................... 582.B.7 ALKALINE SOUR WATER CORROSION ........................................................................................ 582.B.7.1 Description of Damage............................................................................................................ 582.B.7.2 Basic Data ................................................................................................................................ 582.B.7.3 Determination of Corrosion Rate ........................................................................................... 582.B.7.4 References ............................................................................................................................... 592.B.7.5 Tables........................................................................................................................................ 592.B.7.6 Figures ...................................................................................................................................... 60
2.B.8 AMINE CORROSION ........................................................................................................................ 602.B.8.1 Description of Damage ........................................................................................................... 602.B.8.2 Basic Data ................................................................................................................................ 612.B.8.3 Determination of Corrosion Rate ........................................................................................... 612.B.8.4 References ............................................................................................................................... 612.B.8.5 Tables ....................................................................................................................................... 622.B.8.6 Figures ...................................................................................................................................... 682.B.9 HIGH TEMPERATURE OXIDATION ................................................................................................. 682.B.9.1 Description of Damage ........................................................................................................... 682.B.9.2 Basic Data ................................................................................................................................ 682.B.9.3 Determination of Corrosion Rate ........................................................................................... 682.B.9.4 Tables ....................................................................................................................................... 692.B.9.5 Figures ...................................................................................................................................... 712.B.10 ACID SOUR WATER CORROSION ............................................................................................. 712.B.10.1 Description of Damage ....................................................................................................... 712.B.10.1.1 Overview...................................................................................................................... 712.B.10.1.2 Scope and Limitations ............................................................................................... 712.B.10.2 Basic Data ............................................................................................................................ 722.B.10.3 Determination of Corrosion Rate ...................................................................................... 722.B.10.4 Nomenclature ...................................................................................................................... 722.B.10.5 References ........................................................................................................................... 732.B.10.6 Tables ................................................................................................................................... 732.B.10.7 Figures ................................................................................................................................. 752.B.11 COOLING WATER CORROSION ................................................................................................ 762.B.11.1 Description of Damage ....................................................................................................... 762.B.11.1.1 Overview...................................................................................................................... 762.B.11.1.2 Types of Cooling Water Systems ............................................................................. 762.B.11.1.3 Once Through Systems ............................................................................................. 762.B.11.1.4 Closed Recirculated Systems ................................................................................... 772.B.11.1.5 Open Recirculated Systems ...................................................................................... 772.B.11.1.6 Factors Affecting Corrosion Rate ............................................................................. 772.B.11.1.7 Types of Corrosion .................................................................................................... 782.B.11.1.8 Corrosion Monitoring and Control in Cooling Water Systems .............................. 782.B.11.1.9 Indicators for Corrosion Issues and Their Deterrence ........................................... 792.B.11.1.10 Assumptions ............................................................................................................... 802.B.11.1.1 Corrosion Rates for Copper Alloys Components ................................................... 802.B.11.2 Basic Data ............................................................................................................................ 812.B.11.2.1 Recirculating Cooling Water Systems ..................................................................... 812.B.11.2.2 Once Through Cooling Water Systems ................................................................... 812.B.11.3 Determination of Corrosion Rate ...................................................................................... 812.B.11.3.1 Recirculating Cooling Water Systems ..................................................................... 812.B.11.3.2 Once Through Cooling Water Systems ................................................................... 842.B.11.3.3 Groundwater ............................................................................................................... 852.B.11.4 Nomenclature ...................................................................................................................... 862.B.11.5 References ........................................................................................................................... 862.B.11.7 Figures ................................................................................................................................. 942.B.12 SOIL-SIDE CORROSION ............................................................................................................. 952.B.12.1 Description of Damage ....................................................................................................... 95
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2.B.8 AMINE CORROSION ........................................................................................................................ 60
2.B.8.1 Description of Damage ........................................................................................................... 60
2.B.8.2 Basic Data ................................................................................................................................ 61
2.B.8.3 Determination of Corrosion Rate ........................................................................................... 61
2.B.8.4 References ............................................................................................................................... 61
2.B.8.5 Tables ....................................................................................................................................... 62
2.B.8.6 Figures ...................................................................................................................................... 68
2.B.9 HIGH TEMPERATURE OXIDATION ................................................................................................. 68
2.B.9.1 Description of Damage ........................................................................................................... 68
2.B.9.2 Basic Data ................................................................................................................................ 68
2.B.9.3 Determination of Corrosion Rate ........................................................................................... 68
2.B.9.4 Tables ....................................................................................................................................... 69
2.B.9.5 Figures ...................................................................................................................................... 71
2.B.10 ACID SOUR WATER CORROSION ............................................................................................. 71
2.B.10.1 Description of Damage ....................................................................................................... 71
2.B.10.1.1 Overview...................................................................................................................... 71
2.B.10.1.2 Scope and Limitations ............................................................................................... 71
2.B.10.2 Basic Data ............................................................................................................................ 72
2.B.10.3 Determination of Corrosion Rate ...................................................................................... 72
2.B.10.4 Nomenclature ...................................................................................................................... 72
2.B.10.5 References ........................................................................................................................... 73
2.B.10.6 Tables ................................................................................................................................... 73
2.B.10.7 Figures ................................................................................................................................. 75
2.B.11 COOLING WATER CORROSION ................................................................................................ 76
2.B.11.1 Description of Damage ....................................................................................................... 76
2.B.11.1.1 Overview...................................................................................................................... 76
2.B.11.1.2 Types of Cooling Water Systems ............................................................................. 76
2.B.11.1.3 Once Through Systems ............................................................................................. 76
2.B.11.1.4 Closed Recirculated Systems ................................................................................... 77
2.B.11.1.5 Open Recirculated Systems ...................................................................................... 77
2.B.11.1.6 Factors Affecting Corrosion Rate ............................................................................. 77
2.B.11.1.7 Types of Corrosion .................................................................................................... 78
2.B.11.1.8 Corrosion Monitoring and Control in Cooling Water Systems .............................. 78
2.B.11.1.9 Indicators for Corrosion Issues and Their Deterrence ........................................... 79
2.B.11.1.10 Assumptions ............................................................................................................... 80
2.B.11.1.1 Corrosion Rates for Copper Alloys Components ................................................... 80
2.B.11.2 Basic Data ............................................................................................................................ 81
2.B.11.2.1 Recirculating Cooling Water Systems ..................................................................... 81
2.B.11.2.2 Once Through Cooling Water Systems ................................................................... 81
2.B.11.3 Determination of Corrosion Rate ...................................................................................... 81
2.B.11.3.1 Recirculating Cooling Water Systems ..................................................................... 81
2.B.11.3.2 Once Through Cooling Water Systems ................................................................... 84
2.B.11.3.3 Groundwater ............................................................................................................... 85
2.B.11.4 Nomenclature ...................................................................................................................... 86
2.B.11.5 References ........................................................................................................................... 86
2.B.11.7 Figures ................................................................................................................................. 94
2.B.12 SOIL-SIDE CORROSION ............................................................................................................. 95
2.B.12.1 Description of Damage ....................................................................................................... 95
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