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During a methanol transfer to a tank the high level switch tripped the pump. The level transmitter indicated that the tank was only half full. The interlock was bypassed, and the pump was restarted, resulting in overfilling the tank and a large methanol spill.
Ask yourself and your crew:
- How can something like this happen here (e.g. on our site)?
- What safety measures (i.e. procedures, controls/barriers) do we have in place to mitigate the risk?
- How do we know the risk controls/barriers are working?
- What improvements or changes should we make to the procedures, controls/barriers or the way we work?
Original material courtesy of the European Process Safety Centre