Safety critical elements (SCEs) are parts of a facility that are designed to prevent or limit the consequences of a major accident.

 Safety critical elements (SCEs) are parts of a facility that are designed to prevent or limit the consequences of a major accident. SCEs can include equipment, systems, structures, and installations. 

SCEs are important for ensuring system safety and managing major accident risks. They can include: 

Protection systems

Firewater pumps, passive and active fire protection systems, explosion protection, and layout and segregation 

Detection systems

Fire and gas detection, corrosion monitoring equipment, and flaring monitoring equipment 

Shutdown systems

ESD including IPF and HIPPS, depressurization equipment, isolation piping, and isolation valves 

Structural integrity

Regular inspections and maintenance to ensure the structural integrity of platforms and rigs 

SCEs are assessed based on functionality, hazardous area classification, and potential for loss of containment. Performance standards should be established for all SCEs. 

Qualitative techniques, such as Hazard Identification Studies, can be used to identify SCEs. These techniques involve the systematic identification and evaluation of potential hazards based on expert judgment and experience