High-fidelity validation of emergency blowdown scenarios following API Std 521 relief contingency case emergency depressuring
BPT investigated the flare system capacity during emergency blowdown scenarios.
The process safety study was performed with combined use of steady state & dynamic process simulator to fully utilize the installed flare system capacity with interlinked multiphase flow and dynamic process simulator.
API Std 521 relief contingency case emergency depressuring was followed.
The graph above shows the resulting blowdown rates as function of time for the "Fire Zone A" incident, that is; a confirmed fire in Zone A in a facility initiates a sequenced emergency blowdown of the entire facility. Process segments in Zone A is prioritized for depressuring first. Remaining process segments will be depressurized in a sequence not to exceed the capacity of the flare system.