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

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PART 3ANNEX 3.A—BASIS FOR CONSEQUENCE METHODOLOGY
CONTENTS3.A.1 GENERAL .......................................................................................................................................... 13.A.2 REFERENCES ................................................................................................................................... 13.A.3 LEVEL 1 CONSEQUENCE METHODOLOGY .................................................................................. 13.A.3.1 Representative Fluid and Associated Properties ................................................................. 13.A.3.1.1 Overview .......................................................................................................................... 13.A.3.1.2 Choice of Representative Fluids for Mixtures ............................................................. 13.A.3.1.3 Fluid Properties ............................................................................................................... 23.A.3.2 Release Hole Size Selection ................................................................................................... 23.A.3.2.1 Overview .......................................................................................................................... 23.A.3.2.2 Piping ............................................................................................................................... 33.A.3.2.3 Pressure Vessels ............................................................................................................ 33.A.3.2.4 Pumps .............................................................................................................................. 33.A.3.2.5 Compressors ................................................................................................................... 33.A.3.3 Fluid Inventory Available for Release .................................................................................... 33.A.3.3.1 Overview .......................................................................................................................... 33.A.3.3.2 Liquid Inventory .............................................................................................................. 43.A.3.3.3 Vapor Inventory ............................................................................................................... 43.A.3.3.4 Two-phase Systems ....................................................................................................... 43.A.3.4 Determination of the Release Type (Instantaneous or Continuous) .................................. 53.A.3.5 Determination of Flammable and Explosive Consequences .............................................. 53.A.3.5.1 Overview .......................................................................................................................... 53.A.3.5.2 Assumptions and Limitations ....................................................................................... 53.A.3.5.3 Basis for Flammable Consequence Area Tables ........................................................ 63.A.3.6 Determination of Toxic Consequences ................................................................................. 83.A.3.6.1 Overview .......................................................................................................................... 83.A.3.6.2 Background for Calculation of Toxic Consequences ................................................. 83.A.3.6.3 Toxic Continuous Releases ........................................................................................... 83.A.3.6.4 Toxic Instantaneous Releases ...................................................................................... 83.A.3.6.5 Development of Toxic Consequence Areas for HF Acid ............................................ 93.A.3.6.6 Development of Toxic Consequence Areas for H 2S.................................................... 103.A.3.6.7 Development of Toxic Consequence Areas for Ammonia ......................................... 103.A.3.6.8 Development of Toxic Consequence Areas for Chlorine ........................................... 113.A.3.6.9 Development of Toxic Consequence Areas for Common Chemicals ....................... 113.A.3.7 Nomenclature ........................................................................................................................... 123.A.3.8 Tables........................................................................................................................................ 143.A.3.9 Figures ...................................................................................................................................... 203.A.4 LEVEL 2 CONSEQUENCE METHODOLOGY .................................................................................. 233.A.4.1 General...................................................................................................................................... 233.A.4.2 Cloud Dispersion Analysis ..................................................................................................... 233.A.5 CONSEQUENCE METHODOLOGY FOR ATMOSPHERIC STORAGE TANKS ............................. 233.A.5.1 Overview ................................................................................................................................... 233.A.5.2 Representative Fluid and Associated Properties ................................................................. 233.A.5.3 Generic Failure Frequencies and Release Holes Sizes ....................................................... 243.A.5.3.1 Atmospheric Storage Tank Bottom .............................................................................. 243.A.5.3.2 Shell Courses .................................................................................................................. 243.A.5.4 Estimating the Fluid Inventory Available for Release .......................................................... 253.A.5.5 Determination of the Release Type (Instantaneous or Continuous) .................................. 25
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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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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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Page 547 and 548: PART 5SPECIAL EQUIPMENT5-1
Page 549 and 550: Consequence of Failure Methodology
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CONTENTS5.A.1 General .............
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API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

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