SIL Studies — Ensuring Functional Safety
Introduction
We determine and verify Safety Integrity Levels (SIL) for Safety Instrumented Systems (SIS) so your plant responds reliably when it matters most.
Basics of Functional Safety
Functional safety ensures hazardous conditions are detected automatically and predefined safety actions are executed to reduce risk to acceptable levels.
- Focus on Safety Instrumented Systems (SIS)
- Protects people, assets, and the environment
- Aligned with IEC 61508 / IEC 61511
When SIL Studies Are Conducted
- During PHA (alongside HAZOP/LOPA)
- At FEED or detailed design for new projects
- For plant modifications affecting safety systems
- Periodic re-validation to assure performance
Methodology
- Identify SIFs protecting specific hazards
- Assess risk and tolerable risk criteria
- Assign SIL via LOPA / risk graphs
- Verify design: PFDavg, HFT, systematic capability
- Document & maintain lifecycle compliance
Benefits to Your Operation
- Quantified risk reduction to ALARP
- Compliance with IEC 61508 / 61511
- Higher reliability of critical protection layers
- Operational assurance during safety demands
Apex Process Safety Solutions delivers end-to-end SIL determination and verification—integrated with HAZOP and LOPA—tailored to your facility and risk criteria.
