Zennir YoucefBounezour Hichem2024-05-082024-05-082022-06-012543-3792http://dspace.univ-skikda.dz:4000/handle/123456789/1623The main object of this paper is to evaluate safety barriers intervening against overpressure implemented on a crude oil heater using layers of protection analysis approach suggested in IEC 61508 (International Electrotechnical Commission) Standard for the determination of safety requirements are illustrated. Accident scenarios are pre-identified using Hazard an Operability approach, Fault tree approach is required for an effective risk assessment process. In order to better appreciate accident scenarios, P (Process Hazard Analysis Software Tool) is utilized to simulate them.enArticle