Relief & Flare Expertise for Complex Operating Scenarios
ZAP performs relief and flare studies for complex industrial facilities, combining process engineering, overpressure scenario analysis, relief device sizing, and flare system hydraulic modeling. Our engineers evaluate individual relief devices and systemwide events to determine whether existing systems can safely accommodate controlling loads.
ZAP helps clients identify capacity constraints, resolve backpressure concerns, and prioritize necessary modifications without overdesigning the system. Our studies provide the technical basis and documentation needed to support safe operations, facility changes, and PSM and RMP compliance.
Relief & Flare Study Capabilities
- Relief device sizing for overpressure scenarios
- API 520, API 521, and ASME Section VIII evaluations
- Two-phase and reactive system relief calculations
- Flare header hydraulic modeling and backpressure analysis
- Global relief scenario evaluation
- Knockout drum and seal drum sizing
- Flare stack radiation and dispersion modeling
- Relief system revalidation following process modifications
- Emergency depressuring system analysis
- Inlet and outlet piping pressure-drop calculations
- Documentation supporting PSM and RMP requirements
