Vent sizing and Emergency Relief System Studies are undertaken to verify the proper equipment and/or safety precautions utilized during the processing steps. To achieve this objective, the `study-scope` specification usually covers the aspects of vapour relief calculations, reaction hazard assessment and may include or exclude decomposition reactions depending on the requirement. The study consists of a number of discrete tasks shown below. The fire engulfment calculations form the most straight-forward aspect of the study. The chemical reaction hazards study is a considerably more detailed task and is usually broken down into a larger number of discrete tasks. This study requires basic data information on the processes also. Some indication of the tasks undertaken as part of the study are shown below

Task 1: Vent Sizing for Fire Engulfment Emergency Relief Vent Sizing Procedure

Task 2: Risk Ranking of Chemical Reactions

Task 3 : Experimental Characterisation of Chemical Reactions

Task 4 : Identification and Selection of Process Deviation Scenarios

Task 5 : Experimental Characterisation of Runaway Reactions

Task 6 : Vent Sizing for Runaway Reaction