“Safety Alarms” (aka Safety Related Alarms) are commonly used as safeguards or independent protection layers to prevent the escalation of hazardous scenarios. Despite this simple purpose, there is a wide range in the interpretation of what a safety alarm is, its requirements and how it should be managed. Some schools of thought advocate that safety alarms have a risk reduction > 10 and must be implemented in a safety instrumented system (SIS) that is compliant with IEC 61511. Others would say that all alarms implemented in an SIS are safety alarms. Still others would say that safety alarms can be implemented in a BPCS, and they may be assigned a risk reduction factor ≤ 10.
This webinar will highlight the current “body of knowledge” contained in ISA-18.2, EEMUA 191, UK HSE’s OG47, IEC 61511, and ISA-84. It will also discuss where industry is heading in terms of new guidance, interpretations, and requirements. Organizations such as the UK HSE, NAMUR, and ISA are updating existing guidelines or developing new ones. ISA is developing a new standard on Safety Controls, Alarms and Interlocks (ISA-84-91.03).
This webinar will discuss how to identify what is a safety alarm (and what this means to the end user). It will also discuss how risk reduction, safety integrity level, identification as a safeguard or independent protection layer, and use as a mitigation or prevention barrier, impacts requirements.