HAZID
Worksheet (Excel)

A HAZID (Hazard Identification) worksheet is the per-scenario record produced during an early-phase qualitative hazard identification study, typically at concept, pre-FEED, or FEED stage. Unlike HAZOP, HAZID covers broad hazard categories (fire, explosion, toxic release, mechanical, electrical, natural events, security, construction, operations, decommissioning) before P&IDs are available. The team works from PFDs, plot plans, and project basis of design to identify hazards, score them on the risk matrix, credit existing safeguards, and recommend further engineering or follow-up studies. It is the upstream input to detailed-design HAZOP and LOPA.

Per CCPS Guidelines for Hazard Evaluation Procedures, standard columns: study reference, study phase, area or unit reference, plot plan and PFD reference, hazard category, hazard source (process inventory, stored energy, external event, human factor), scenario, initiating event, cause, consequence (safety, environmental, asset, reputation, business), risk rating (frequency, severity, priority), existing safeguards classified by layer (inherent, engineered, procedural, emergency), safeguard adequacy, recommendation, recommendation category (with inherently safer design called out), action owner, target closure date, downstream study trigger.

Pathnovo, an engineering document intelligence platform, auto-preps HAZID worksheets in 2 weeks by parsing the project basis of design, PFDs, plot plan, and HAZID checklist library, then pre-populating per-area worksheets with the relevant hazard categories, typical scenarios drawn from similar facility scope, and CCPS-aligned safeguard prompts. The HAZID team runs the workshop against the prepped worksheets, focusing on judgement rather than data entry. See the HAZOP and safety intelligence workflow for the full pipeline.

HAZID is qualitative, early-phase, broad-scope hazard identification per CCPS guidance, run at concept / FEED to influence layout and basis of design. HAZOP is qualitative, detailed-engineering, node-by-node deviation analysis per IEC 61882, run when P&IDs are issued for HAZOP-stage review. LOPA (Layer of Protection Analysis) is semi-quantitative per CCPS methodology, run after HAZOP on scenarios requiring a Safety Instrumented Function (SIF), to determine required SIL per IEC 61511. Each builds on the previous. See the HAZID standard reference, the LOPA standard reference, and the HAZOP node worksheet template.

HAZID recommendations classified as inherently safer design or major engineering change feed back into the project basis of design and PFD update before detailed engineering. Scenarios that need detailed evaluation feed HAZOP at IFR (Issued For Review) P&ID stage. Scenarios with high frequency or high severity feed LOPA for semi-quantitative SIL determination. Major release scenarios feed QRA (Quantitative Risk Assessment). Fire and toxic gas release scenarios feed Fire and Gas detector mapping per ISA TR84.00.07. The Downstream Study Required column captures the trigger.

For Indian refinery, petrochemical, fertiliser, and LNG projects under MoPNG and PNGRB jurisdiction, the HAZID worksheet additionally records OISD 118 (Layout for Oil and Gas Installations) impact for scenarios affecting layout, inter-distance, or hazardous area extent, and OISD 116 fire-fighting and emergency response impact. Brownfield HAZID for unit revamp captures legacy plant constraints (existing inter-distance non-conformances, legacy hazardous area classifications). See the OISD 118 compliance workflow.

HAZID is typically conducted at three points in the project lifecycle: concept HAZID (to inform site selection and broad layout), FEED HAZID (to inform plot plan and equipment placement before detailed engineering), and construction or pre-startup HAZID for major brownfield work or unit revamp. For Indian PSU brownfield projects, an additional revalidation HAZID is often run before turnaround scope freeze. The Study Phase column on the worksheet captures the lifecycle stage so the right hazard categories and risk matrix are applied.