ITSEMAP

When carrying out PHAs, the need to introduce Safety Instrumented Functions may arise, requiring their integration into a Safety Instrumented System with a specified Safety Integrity Level (SIL).

Why should a SIL assessment be carried out?

Calculation of the SIL applicable in the design and assessment of a SIS provides a final layer of protection to ensure that any risks which cannot be dealt with by traditional control methods are dealt with.

When should a SIL assessment be carried out?

Whenever the following are required:

• Improved safety in installations.
• Verification of the safety levels provided by different layers of protection.
• A reduction in the financial losses suffered as a result of material damage costs, loss of profits, or civil liability costs arising from accidents.