Academy Offers

Get a 20% discount on eLearning course purchases made through July 31. Use code ACADEMY20 at check out.

AIChE members receive complimentary, unlimited access to live and on-demand AIChE webinars by purchasing them with their newly increased number of credits. See more resources.

Benchmarking Industry Practices for the Use of Alarms As Safeguards and Layers of Protection

  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Spring Meeting and Global Congress on Process Safety
  • Presentation Date:
    April 30, 2013
  • Duration:
    30 minutes
  • Skill Level:
  • PDHs:

Share This Post:

Operator response to alarms is a common risk reduction mechanism considered during layer of protection analysis (LOPA). Industry practices on how to treat alarms as independent protection layers can vary greatly. For example, some companies do not allow any credit to be taken for alarms during a LOPA (zero risk reduction), while others allow up to two orders of magnitude (risk reduction factor of 100, SIL 2) to be taken.

This presentation will discuss current industry practices around the use of alarms as safeguards and layers of protection as established by a recent benchmark survey of over 200 safety practitioners from around the world. Areas explored in the survey include; typical and maximum claimed risk reduction, considerations used to determine whether an alarm can be credited with risk reduction, how often IPL alarms are determined to be invalid or ineffective in operation, and practices for display and annunciation through a Human Machine Interface (HMI). Key results and conclusions will be presented as well as recommendations on where industry should focus on improvement.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.



Do you already own this?



AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Graduate Student Members Free
AIChE Undergraduate Student Members Free
Non-Members $25.00