Functional Safety Engineering
Functional Safety Engineering/SIL (Safety Integrity Level) studies are implemented throughout the entire lifecycle of the Oil & Gas facilities i.e. during the engineering design phases (FEED & Detailed Design), construction, commissioning and the operation of these facilities.
The relevant studies are as follows:1. SIL Assessment/Classification
2. SIL Verification & Implementation
3. Safety Requirements Specification (SRS)
1. SIL Assessment & Classification
This study is to determine the SIL level/target of the SIF (Safety Instrumented Function)/IPF (Instrumented Protective Function) of the facilities and it is carried out accordance to :
AZSB utilises EXIDA’s exSILentia verification tools and failure rates data (PFDavg) to perform SIL Verification & Implementation calculations.
This scope requires AZSB to develop the SRS, documenting the technical specifications and requirements of ALL components of the SIF/IPF loops such as the initiator, IS barrier, input modules, logic solver, output modules, actuator, solenoid and shutdown valves; as per the SIL Classification exercise.
The SRS is a lifecycle document, which will be updated at the different phases of the facilities such as the SIL Verification exercise (detailed design phase), construction & commissioning phases and Operation & Maintenance phaseof the facilities.