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Comment PDF Environment, Health, Safety & Security

Facts At Your Fingertips: Process Hazard Identification Methods

By Scott Jenkins |

Process hazards analyses (PHAs) are structured reviews during the engineering design process intended to detect potential hazards that were not addressed by the design team. This one-page reference describes commonly employed PHA methods. PHA methods PHAs are often conducted or moderated by a specialist, with participation by the design team, owner’s employees or experienced operators. Several PHA methodologies exist, each suitable for specific purposes and for certain phases of project development and plant lifecycle (Figure 1). FIGURE 1. Typical hazards analyses that are used throughout a CPI project lifecycle[/caption] Consequence analysis. This method quantitatively assesses the consequences of hazardous material releases. Release rates are calculated for the worst-case and alternative scenarios. Toxic points are defined and release duration is determined. Hazard identification analysis (HAZID). HAZID is a preliminary study performed in early project stages when hazardous material, process information, flow diagrams and plant location are known. It is generally used later on to design the preliminary piping and instrumentation diagrams (P&IDs). What-if. This is a brainstorming method that uses questions starting with…
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