HAZID (Hazard analysis)

Design and Engineering HAZARD Elimination hazard identification HAZID (Hazard analysis)

For any project in any company, HAZID is carried out first to access risk in a process. Identification of different types of hazards is the main objective of HAZID. A hazard is a possible condition and exists or not (probability is 1 or 0). It may in single/multiple existence or in combination with other hazards or sometimes called events and conditions become an actual Functional Failure or Accident. The way this exactly happens in one particular sequence is called a scenario.

This scenario has a probability (between 1 and 0) of occurrence. Every so often a system has many possible failure scenarios. It also is assigned a classification, based on the worst case severity of the end condition. Risk is the combination of probability and severity.

Preliminary risk levels can be provided in the hazard analysis. The validation, more precise prediction and acceptance of risk is determined in the Risk assessment. The main goal of both is to provide the best selection of means of controlling or eliminating the risk. The term is used in several engineering specialties, including avionics, chemical process safety, safety engineering, reliability engineering and food safety.

Hazard Identification (HAZID) shall be executed by inter-disciplinary project team to identify anticipated hazards and effects in line with EP 95-0312. From this assessment risk reduction measures shall be identified such that work methods or practices, emergency contingency plans and other activities can be planned.  A Hazard and Effects Register shall be developed following the HAZID.  The HAZID report shall be updated including closing of any pending actions.

The HAZID shall review the potential hazards to the new facilities and those between the project and the existing plant following a list of guidewords which fall under the following categories:

  • External and environmental hazards
    • Facility hazards
    • Health hazards
    • Project implementation issues
HAZID Hazard Analysis

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