What are the Emergency shutdown procedures?
Introduction To minimise the interruption to production caused by a safety shutdown, the safety system should be divided into 5 hierarchical levels, with progressively wider impact on production. These levels of emergency shutdown are as follows: • Level 1: Emergency shutdown and depressurisation of the overall plant • Level 2: Emergency shutdown for a process unit within the plant • Level 3: Process shutdown for a process unit within the plan • Level 4 Process train shutdown within a unit • Level 5: Shutdown of Individual equipment and utilities The safety system for some plants may not require all five levels of shutdown due to the plant being of a …