Hazard Identification Study (HAZID) in Brief

Hazard Identification (HAZID) is a brainstorming workshop with a multi-disciplinary team to identify potential hazards, and may be broad in their scope and thus have a wide applicability. HAZID typically examines all reasonably possible sources of hazard during project design, construction, installation, and decommissioning activities, and for proposed changes to existing operations. The HAZID is one technique within a suite of hazard evaluation and risk management tools. This process is at a higher level compared to a HAZOP, What-If or bowtie study. In addition, be conducted at a unit or system level with little documentation other than a design concept.

The objectives of HAZIDs are numerous and includes: identify potential hazards, determine potential consequences of the hazards, identify safeguards that are in place to provide hazard prevention, control or mitigation (including planned safeguards depending on the stage of the project), propose recommendations, as needed, to eliminate, prevent, control, or mitigate hazards, provide early safety and risk input into design and safety management requirements for an activity, and Provide a clear basis for major accident event screening as part of subsequent formal safety assessment studies.

A HAZID study may be conducted during the late select stage or early define stage of a project, when conceptual design layouts are nearing completion. It can be conducted in four simple steps: Groundwork: to gather all relevant information about the project like drawings, decisions the HAZID is to support, client standards and expectations. Preparation and Terms of Reference (TOR): to prepare a document that contains HAZID objectives, scope, proposed nodes, methodology, and workshop venue etc. Then, Workshop Sessions: perform workshop per client-approved TOR and record session worksheets. Finally, Reporting: to prepare a HAZID report document based upon the TOR and the workshop session recordings highlighting key findings.

Implementation of HAZID study need a team with leader, scribe, team members like Custodian, Follow up Coordinator, Discipline Engineer, and Safety Engineer. Often a HAZID will require a preliminary risk assessment to be undertaken to be able to prioritize the hazards identified based on the inherent risk associated with the hazard, and sometimes there is a requirement to provide an assessment of residual risk. At the end, the study generates a report with worksheets, team members, guide words, risk assessment, matrix, and key findings & recommendations.

Finally, there are two main types of HAZID: Conceptual HAZID and Detailed HAZID. Conceptional is performed when we have very high-level information available on the design – such as block flows. But, detailed HAZID, design work would normally have progressed to the point where Process Flow Schemes (PFS) have been developed and some thought has been given to plot layout, hazardous inventories, utility requirements, etc.

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