Fire and Gas systems (FGS) are important tools for safeguarding process plants and production facilities that handle flammable and toxic materials. All such facilities have inherent fire risk that can not be fully mitigated by preventative instrumented functions, in some cases these facilities require the installation of fire and gas systems to mitigate these hazards. Kenexis assists our clients in the performance-based design and evaluation of fire and gas systems, commonly referred to as fire and gas mapping.
Kenexis Fire and Gas Mapping services include assistance in all phases of the fire and gas system lifecycle. These services are based around our unparalleled expertise in not only fire and gas system design, but also process knowledge and risk analysis capabilities. This expertise is then deployed using best-in-class tools such as the Effigy™ fire and gas mapping software. This combination provides the most rigorous analysis against performance targets, which results in the safest plant while also resulting in the lowest cost.
Optimizing Gas Detector Placement
Using Kenexis work practices, we are able to mathematically validate the proper detector locations to maximize coverage with the minimal number of detectors. In a recent study, the prescriptive model of 27 detectors was reduced to 14 detectors using performance based modeling techniques, while only reducing the actual coverage from 91% to 86%. The eliminated 13 detectors, were only providing 5% of the total coverage.
This result is a substantial reduction in capital expense, installation cost, reduced conduit and space burden, and the reduction of the maintenance cost of the life of the platform.
While these results were very good, not every scenario produces the same results. In fact, the quantity of detectors can actually increase to provide the level of protection required. Regardless, our clients appreciate knowing why every detector is at its location.