HAZOP Action Register Digitisation for OISD 118 Compliance
Indian Petrochemical Plant — Indian Petrochemical Plant
Audit passed. Zero process safety findings.
2,400
Pages Processed
1,847
HAZOP Actions Extracted
31
Superseded Nodes Found
Zero
Safety Findings
An Indian petrochemical plant faced an upcoming OISD 118 audit. Their 2,400-page HAZOP study, completed in 2019, had not been updated despite two P&ID revision cycles. The plant needed proof that all HAZOP actions were tracked and that no nodes referenced superseded drawings.
The Challenge
A 2,400-page HAZOP study completed in 2019 — never structured into a queryable register.
The plant had undergone two full P&ID revision cycles since the study was written. Node references were potentially outdated.
An upcoming OISD 118 audit required proof that all HAZOP actions were tracked and no nodes referenced superseded drawings.
Manual review was estimated at six weeks for four engineers — and the audit was eight weeks away.
Our Approach
Ingested the entire 2,400-page HAZOP study — a mix of tabular data, narrative text, and P&ID node references.
Extracted 1,847 individual HAZOP actions into a structured, queryable register with action owner, status, and deadline fields.
Mapped every P&ID node reference in the HAZOP study to the current P&ID revision set.
Identified 31 nodes that referenced superseded drawings — meaning the HAZOP conclusions for those nodes were based on outdated process conditions.
Flagged all 31 nodes for re-HAZOP review with specific references to what changed between revisions.
Delivered the structured register with full traceability back to source documents and page numbers.
Results
1,847 HAZOP actions extracted into a structured, queryable register — the first time the plant had this capability.
All node references mapped to current P&ID revisions with revision-level traceability.
31 nodes referencing superseded drawings identified and flagged for re-HAZOP — the plant had no prior awareness of these.
OISD 118 audit passed with zero process safety findings.
Completed in 4 weeks — half the estimated time for manual review.
The register is now maintained as a living document, updated automatically as P&ID revisions are issued.
“For the first time, our process safety team had a structured, queryable HAZOP register linked to current P&ID revisions. We found 31 nodes referencing superseded drawings we had never known about.”
PSProcess Safety Manager
Indian Petrochemical Plant
Documents Processed
HAZOP Study (2,400 pages)
P&IDs (current and superseded revisions)
Capabilities Used
Target System
Structured HAZOP Register with P&ID Revision Linkage
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