(72c) Barrier Thinking Using Bow Ties for Offshore Production Platforms – a Case Study
AIChE Spring Meeting and Global Congress on Process Safety
2017
2017 Spring Meeting and 13th Global Congress on Process Safety
Global Congress on Process Safety
LOPA and Bowties in Practice – Case Studies & Plant Applications
Tuesday, March 28, 2017 - 9:00am to 9:30am
Traditional bow ties can be difficult for operators to use since they can be large and complicated. Hess has taken a measured approach in developing simplified bow ties that only include threats and barriers that Operations has control over.
The cornerstone of this approach was developing âMajor Accident Event (MAE) Bowtieâ templates that outline the minimum barriers to be in place. These templates are used to develop âasset specificâ bowties that are tailored to include only the threats, barriers and consequences relevant to the asset. The templates simplify the process of creating the bow ties and also provide consistency across the assets that use them.
Another enhancement in the approach is the use of a barrier index. This index contains all the barriers on the bow ties and lists which bow ties the barrier appears on and how many times it appears on each bow tie. This index has been the key to operators finding the bow ties easy to use.
This case study reviews:
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how the MAE templates were developed,
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how asset specific bow ties are used when a barrier (safety critical equipment) is unavailable or taken out of service for maintenance
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lessons learned from the successful pilot at one of the Hess Gulf of Mexico production platforms.
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