SEARCH Articles Figures Tables 1 shows general risk categorization process, in which Fig. I 3.4.3-1A can be considered as general standard model, whereas Fig. I 3.4.3-1B and C show how scenario changes when categorization changes. Keeping this in mind, it is better to understand the same with the help some examples of various risk categories encountered in industrial process plants. These have been shown in Fig. I 3.4.3-2, to [Publishers Imprint]