API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology
3.A-20 API RECOMMENDED PRACTICE 5813.A.3.9 FiguresInstantaneous-Type ReleaseVCELate IgnitionFlash FireEarly IgnitionFireballFinal State GasNo IgnitionAbove AITFireballSafe DispersionIgnitionPool FireFinal State LiquidNo IgnitionSafe DispersionContinuous-Type ReleaseVCELate IgnitionFlash FireEarly IgnitionJet FireFinal State GasNo IgnitionAbove AITJet FireSafe DispersionFinal State LiquidIgnitionNo IgnitionPool FireJet FireSafe DispersionFigure 3.A.3.1—Level 1 Consequence Methodology Event Tree
RISK-BASED INSPECTION METHODOLOGY, PART 3, ANNEX 3.A—BASIS FOR CONSEQUENCE METHODOLOGY 3.A-21Point ofRelease2a2bY-Distance From ReleaseX-Distance From ReleaseFigure 3.A.3.2—Approximated Cloud Shape for Toxic Plume from a Continuous Release
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3.A-20 API RECOMMENDED PRACTICE 581
3.A.3.9 Figures
Instantaneous-Type Release
VCE
Late Ignition
Flash Fire
Early Ignition
Fireball
Final State Gas
No Ignition
Above AIT
Fireball
Safe Dispersion
Ignition
Pool Fire
Final State Liquid
No Ignition
Safe Dispersion
Continuous-Type Release
VCE
Late Ignition
Flash Fire
Early Ignition
Jet Fire
Final State Gas
No Ignition
Above AIT
Jet Fire
Safe Dispersion
Final State Liquid
Ignition
No Ignition
Pool Fire
Jet Fire
Safe Dispersion
Figure 3.A.3.1—Level 1 Consequence Methodology Event Tree
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