What is typically the first step in the HAZOP process?

The HAZOP (Hazard and Operability Study) process is a systematic and structured method used to identify potential hazards and operability issues in a process design. The first step in this process involves selecting a node in the process, which typically represents a specific part of the system or a defined section of the operation.

This selection is crucial because it establishes the focus for the analysis. By defining nodes, teams can isolate sections of the process to evaluate potential hazards without ambiguity, making the subsequent steps more manageable and organized. Each node will then go through the analysis where guide words are applied, consequences of deviations are reviewed, and equipment is assessed, building a comprehensive safety assessment for that particular section of the process.

Thus, selecting a node serves as the foundation for the entire HAZOP study, guiding the team's focus and ensuring a thorough and structured evaluation of each part of the process under consideration.