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

CONTENTS
OVERVIEW ........................................................................................................................................ 1
INSPECTION EFFECTIVENESS ...................................................................................................... 1
2.C.2.1 The Value of Inspection .......................................................................................................... 1
2.C.2.2 Inspection Effectiveness Categories ..................................................................................... 2
2.C.2.3 Tables ....................................................................................................................................... 3
PRESSURE-RELIEF VALVES .......................................................................................................... 3
2.C.3.1 Tables ....................................................................................................................................... 4
HEAT EXCHANGER TUBE BUNDLES ............................................................................................ 5
2.C.4.1 Inspection Planning with Inspection History ....................................................................... 5
2.C.4.1.1 Effect of Inspection on Probability of Failure .............................................................. 5
2.C.4.1.2 Reduction in Uncertainty Due to Inspection Effectiveness ....................................... 5
2.C.4.1.3 Tables ................................................................................................................................... 6
ATMOSPHERIC STORAGE TANK COMPONENTS ........................................................................ 7
2.C.5.1 Inspection Effectiveness for Atmospheric Storage Tanks ................................................. 7
2.C.5.2 Tables ....................................................................................................................................... 8
NON-METALLIC LININGS ................................................................................................................ 11
2.C.6.1 Inspection Effectiveness for Non-metallic Linings .............................................................. 11
2.C.6.2 Tables ....................................................................................................................................... 11
BURIED COMPONENTS................................................................................................................... 12
2.C.7.1 Inspection Effectiveness for Buried Components ............................................................... 12
2.C.7.2 Tables ....................................................................................................................................... 12
INSPECTION EFFECTIVENESS FOR THINNING ........................................................................... 13
2.C.8.1 Use of the Inspection Effectiveness Tables ......................................................................... 13
2.C.8.2 Tables ....................................................................................................................................... 13
INSPECTION EFFECTIVENESS TABLES FOR STRESS CORROSION CRACKING ................... 15
2.C.9.1 Use of the Inspection Effectiveness Tables ......................................................................... 15
2.C.9.2 Tables ....................................................................................................................................... 15
Table 2.C.9.4—LoIE Example for ClSCC .......................................................................................... 18
Table 2.C.9.6—LoIE Example for SSC .............................................................................................. 20
Table 2.C.9.7—LoIE Example for HIC/SOHIC-H2S Cracking .......................................................... 21
INSPECTION EFFECTIVENESS FOR EXTERNAL DAMAGE .................................................... 24
2.C.10.1 Use of the Inspection Effectiveness Tables ..................................................................... 24
2.C.10.2 Tables ................................................................................................................................... 24
INSPECTION EFFECTIVENESS TABLES FOR HIGH TEMPERATURE HYDROGEN ATTACK
DAMAGE 27
2.C.11.1 Use of the Inspection Effectiveness Tables ..................................................................... 27