A highly interactive two day practical training course in the appreciation of SIL determination to the technical requirements of IEC 61511/ISA 84, and how to achieve these requirements with safety instrumented functions.
Industries today rely upon safety systems to maintain and protect operating assets. Businesses seek to maintain operating effectiveness and reduce spurious trips whilst achieving a safety target appropriate to the circumstances. Fundamental to this process is the determination and implementation of the safety requirements for the safety system.
From the IEC 61508 / 61511 standards, the Safety Integrity Level (SIL):
• Is fundamental in ensuring a safety system performs appropriately and timely.
• Is an assessment of the risk reduction required to give a tolerable level of risk.
• If inappropriately determined, can place the asset integrity under threat.
• Can cause unnecessary expenditures in capital and operational budget.
• If properly defined, allows for significant cost improvements to be achieved.
• Requires periodic testing of safety instrumented functions.
Who will benefit
This training course will be of benefit to all managers and engineers with a responsibility for the management and technical requirements of Safety, Health and Environmental protective programs.
What you will learn
Upon completion of the course, you should be able to:
−− Understand the concepts of SIL determination and the principles of IEC 61511 / ISA 84
−− Explain the key terms and concepts with respect to SIL
−− Understand the importance of SIL determination
−− Determine where present practice is with requirements and identify necessary improvements
−− Implement the SIL determination methodology
Course structure and content - A two-day technical course aimed at responsible managers and engineers
−− Introduction to the standards and their background
−− Scope and applicability
−− Functional safety and IEC 61511 / ISA 84 interpretation
−− IEC 61511 / ISA 84 basic principles refresher
−− The concept and importance of SIL determination
−− Risk concepts and criteria, risk aversion, tolerability including an exercise
−− Understand the concepts underpinning SIL calculation
−− Identify what information is essential before starting the SIL calculation
−− Apply correct formulae for serial or parallel instrument configurations
−− Derive instrument failure rates from commonly available sources
−− The benefits and disadvantages of manufacturers certificates
−− Appreciate the complexities of a ‘human in the loop’
−− What checking and approval is needed for different Safety Integrity Levels
−− Calculate the SIL
−− Risk graph approach with practical exercises
−− LOPA use with exercise examples
−− Dependency demands, layers etc. including a short exercise
−− The ‘pros and cons’ of the differing approaches to SIL determination
−− Introduction to the CASS scheme
Registrations will be kept to a minimum.