(111f) Integrated Approach for HAZOP, LOPA and Alarm Rationalisation

The oil and gas industry is constantly evolving and growing in complexity, with inherent temperature, pressure, and hazardous risks. To maintain safety and stakeholder confidence, a systematic and auditable approach to plant design and operation is essential. Operators are pursuing strategies to enhance profitability and efficiency, particularly in the LNG sector, which is in high demand due to its environmental benefits.

Process Hazard Analysis (PHA) is widely used to identify potential hazards in engineered designs. Various PHA analyses are typically performed during different phases of facility development. Integration of safety analyses like HAZOP, LOPA, and Alarm Rationalisation is essential, but often they are conducted in isolation by different disciplines, leading to inconsistencies and contradictory recommendations.

To address these issues and ensure safe LNG plant design, a formal, systematic, and integrated system for HAZOP, LOPA, and Alarm Rationalisation was developed. This approach minimizes inefficiencies, streamlines analysis, and improves the quality of findings. The paper discusses the application of this methodology in an LNG project, adhering to international standards. The technique will demonstrate how to ensure an integrated approach to HAZOP, LOPA and Alarm Rationalisation whilst following the international standards namely IEC 61882 (Cenelec, 2016) , IEC 61511 (International Electrotechnical Commission,2016) and IEC 62682 (International Electrotechnical Commission,2014).