Process Safety
Layer of Protection Analysis (LOPA)
A semi-quantitative risk-analysis method that evaluates initiating-event frequency and the risk reduction provided by independent protection layers.
Why it matters
LOPA helps determine whether existing safeguards are sufficient or additional independent protection is needed.
Related technical topics
Safety Systems · Advanced
Process Hazard Analysis: HAZOP and LOPA Concepts
Understand how structured process-hazard studies identify deviations, causes, consequences, safeguards and risk-reduction needs in LNG facilities.
Controls & Protection · Intermediate
DCS, SIS and Emergency Shutdown Systems
Understand the different roles of the distributed control system, safety instrumented system and emergency shutdown functions in an LNG facility.
Valves & Protection · Intermediate
Pressure Safety Valves (PSVs)
Understand the purpose, terminology and process-safety role of pressure safety valves protecting LNG equipment and piping against credible overpressure scenarios.