Hazard and Operability Study (HAZOP)
A structured, systematic examination of planned or existing process designs using standardized guide words to identify operational deviations, potential hazards, and protective safeguards.
Purpose of the assessment or study
To systematically identify process deviations (such as High Pressure, Low Flow, Reverse Flow, High Temperature) that could lead to equipment damage, toxic releases, explosions, or unplanned shutdowns, and to evaluate the adequacy of engineered and procedural safeguards.
Applicable facility types
Chemical processing plants, petrochemical facilities, pharmaceutical active pharmaceutical ingredient (API) units, oil and gas installations, refineries, and continuous automated process manufacturing lines.
Proposed study scope
Systematic nodal analysis covering designated piping and instrumentation diagrams (P&IDs), process flow diagrams (PFDs), operating parameters, automated trip interlocks, pressure relief valves, and operational procedures agreed during project scoping.
Scope is structured as a technical proposal framework for client review and adjusted to your facility layout.
Methodology overview
Multi-disciplinary team workshops facilitated by a qualified study leader. The team selects process nodes, applies standard parameter guidewords (More, Less, None, Reverse, As Well As, Part Of), investigates credible causes and consequences, reviews existing safeguards, and formulates prioritized action recommendations.
Client inputs and site visit arrangements
Information required from client
Up-to-date Piping & Instrumentation Diagrams (P&IDs), Process Flow Diagrams (PFDs), Mass & Energy Balances, Process Safety Information (PSI), operating philosophies, interlock logic diagrams, and equipment design datasheets.
Site visit arrangements
Initial physical walkthrough of the process unit to verify P&ID as-built status, field instrument locations, and local manual intervention valves.
Indicative deliverables
Comprehensive HAZOP study report, node-by-node structured study worksheets, prioritized risk action recommendation register, safeguard summary, and attendance logs, subject to agreed scope.
Frequently asked questions
Who should participate in a HAZOP workshop from the client team?
At what project stage should a HAZOP study be conducted?
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