What is a common purpose of Process Hazard Analysis (PHA) in relation to incompatibilities?

• A. To design experiments
• B. To identify and evaluate potential incompatibilities and their consequences
• C. To categorize materials by color
• D. To train operators on safety drills

Answer: (B)

PHA focuses on systematically uncovering where incompatible materials or conditions could interact dangerously and what those interactions could lead to. In relation to incompatibilities, the goal is to identify substances and operating conditions in the process where a reaction could occur or a hazardous consequence could result, such as heat generation, pressure buildup, fire, toxic release, or formation of unstable products. The analysis evaluates both the likelihood of such interactions and the severity of their consequences, so that appropriate safeguards can be put in place. These safeguards include storing and handling materials separately, choosing chemically compatible materials, controlling temperature and mixing, ensuring adequate ventilation and containment, and installing emergency relief or quench options. While other safety activities like experimental testing, color-coding materials, or operator drills are important, they do not define the primary purpose of a PHA, which is to identify incompatibilities, assess their potential outcomes, and implement preventive controls.