FUNCTIONAL SAFETY

Working with in-house or client appointed Process Safety Engineers, EC&I Systems can participate or lead in the detailed design, testing and commissioning (full safety lifecycle) of new Safety Instrumented Systems or conduct a systematic review of existing systems to identify potential gaps in the system that can illustrate where additional work is required to assist in compliance with IEC 61508/61511.

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EC&I Systems provides services in each of the following areas:

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• Process Hazard Analysis (PHA)

• Participating in client HAZID/HAZOP studies

• SIL Determination using any one of the techniques below:​

  • Calibrated Risk Graph

  • Fault Tree Analysis (FTA)

  • Layers of Protection Analysis (LOPA)

• Creation of Safety Requirements Specifications (SRS) for each and every Safety Instrumented Function (SIF)

• All aspects of detailed design to ensure the SIF architecture achieves the target PFDavg/PFH for the overall SIF, with due consideration given to the following:

  • Hardware Fault Tolerance (HFT) requirements

  • Systematic Capability (SC) requirements

  • Diagnostic Capability (DC)

  • Common Cause Failure (CCF)

• SIF hardware verification using evaluation techniques such as:

  • Reliability Block Diagrams (RBD)

  • Fault Tree Analysis

• Creation of Proof Test procedures

• Functional Safety Assessments

• Supporting clients with Modifications including Impact Analysis and Management of Change

• Functional Safety Gap Analysis

• Experienced in the use of the following FS computer software:

  • ExSILentia

  • ProSET

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In addition to Safety Instrumented Systems (SIS), EC&I Systems also has experience in applying the above safety lifecycle phases to the following systems:

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• Fire & Gas (F&G)

• Emergency Shutdown (ESD)