Good day. i am taking Process safety course and i have Hazard Risk assessment to suggest a proposal. must include description on catastrophic risk hazard impact may happen.

location: oil Refinery production process

used below equipments lead to catastrophic hazard impact during the process:

1. columns

2. , (just one of these: vessels, pumps, heat exchangers, compressors etc.),

3. one storage tank with specifying what material may stored and the scenario may happen to lead to catastrophic impact.

please provide full details for 3 scenarios what caused this process risk hazard and possible catastrophic impact.