Latest / Deep End Era. Engineering with Sankalp
The Last Line: Safety Instrumented Systems, SIL and the Lessons of Buncefield
At four in the morning on the roof of a fuel tank, functional safety engineer Caspar Lindqvist watches a technician finish a proof test, and notices the padlock is in a pocket instead of on the test lever. In episode one hundred and nine we follow that padlock back to the night of 11 December 2005, when tank 912 at Buncefield overfilled because its gauge flatlined and its independent high-level switch had been left inoperable. Along the way we separate the pilot from the ejection seat (control versus safety systems), walk the IEC 61511 lifecycle, do a LOPA aloud for a tank overfill, learn the…
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