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

CONTENTS
1 SCOPE .................................................................................................................................................... 1
1.1 Purpose .......................................................................................................................................... 1
1.2 Introduction .................................................................................................................................... 1
1.3 Risk Management .......................................................................................................................... 1
1.4 Organization and Use.................................................................................................................... 2
1.5 Tables ............................................................................................................................................. 2
2 REFERENCES ........................................................................................................................................ 3
2.1 Normative ....................................................................................................................................... 3
2.2 Informative ..................................................................................................................................... 3
3 TERMS, DEFINITIONS, ACRONYMS, AND ABBREVIATIONS ........................................................... 3
3.1 Terms and Definitions ................................................................................................................... 3
3.2 Acronyms and Abbreviations ...................................................................................................... 11
4 BASIC CONCEPTS ................................................................................................................................ 16
4.1 Probability of Failure (POF).......................................................................................................... 16
4.1.1 Overview ................................................................................................................................. 16
4.1.2 GFF Method ............................................................................................................................ 16
4.1.3 Two-parameter Weibull Distribution Method ...................................................................... 17
4.2 Consequence of Failure (COF)..................................................................................................... 17
4.2.1 Overview ................................................................................................................................. 17
4.2.2 Level 1 COF ............................................................................................................................ 18
4.2.3 Level 2 COF ............................................................................................................................ 19
4.3 Risk Analysis ................................................................................................................................. 20
4.3.1 Determination of Risk............................................................................................................ 20
4.3.2 Risk Plotting ........................................................................................................................... 21
4.3.2.3 Iso-Risk Plot Example ........................................................................................................... 21
4.3.3 General Comments Concerning Risk Plotting ................................................................... 22
4.4 Inspection Planning Based on Risk Analysis ............................................................................ 22
4.4.1 Overview ................................................................................................................................. 22
4.4.2 Targets .................................................................................................................................... 23
4.4.3 Inspection Effectiveness—The Value of Inspection .......................................................... 24
4.4.4 Inspection Planning............................................................................................................... 24
4.5 Nomenclature ................................................................................................................................. 24
4.6 Tables ............................................................................................................................................. 26
4.7 Figures ............................................................................................................................................ 27