Hazard identification flow diagram

Figure 5.1 Overview of a Hazard Identification Flow Diagram. Adapted from Hazard Identification Flowchart, Safety and Health Management - Safety Pays Program, (n.d.). Adapted and modified Roughton Crutchfield (2013).

Process safety information is compiled and made available to ah employees to facilitate the understanding and identification of hazards. This information includes block flow diagrams or process flow diagrams, process chemistry, and process limitations, such as temperatures, pressures, flows, and compositions. Consequences of process deviations are also required. This... 

Process flow diagrams of the entire manufacturing process are produced and identification of the CCPs is determined. The assessments include typical hazards and corrective actions. The fact that the thought process and procedures are in place before a crisis occurs offers great benefit. It is a proactive rather than reactive system approach. This same approach can be applied as a tool for the quality assessment of pharmaceutical operations. Examining the systems and procedures using this tool may assist in identifying previously unidentified problems and deficiencies. 

The following tables give initial identification of hazards after study of the process flow diagrams (PFD) and basic engineering documents (BED). These tables are only for illustration purposes. 

System Structure Analysis. After the identification of subsystems to be examined and the definition of undcsired events within the context of preliminary hazard analysis, events which lead to incidents are investigated. These event sequences can be represented as logic structure in a block diagram, a flow diagram, a fault tree, or a decision table. In the presentation which follows (Table 4.9.). a decision table was used. It contains, column by column, the combinations of system states which lead to the undesired event. The presentation permits qualitative identification of weak points in the system. In general, for example, the probability of a system state will decline with the growing number of failed components. The logic structure presentation could form the basis for further quantitative analyses. 

HAZOP analysis utilizes use key guidewords and system diagrams (design representations) to identify system hazards. Adjectives (guide words) such as more, no, and less, are combined with process/system conditions such a speed, flow, and pressure, in the hazard identification process. HAZOP analysis looks for hazards resulting from identified potential deviations in design operational intent. A HAZOP analysis is performed by a team of multidisciplinary experts in a brainstorming session under the leadership of a HAZOP team leader. 

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