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Consulting firm

4 Square Engineering Consultancy

HAZOP chairHAZOP scribeSIL determinationLOPAPHSERDSEAR & HAC

Bo'ness, West Lothian, Scotland, UK · Listed August 6, 2026 · See all HAZOP consultants in UK →

Where they fit

A Scottish consultancy that supplies both the chair and the scribe for HAZOP sessions and handles the study set-up, pairing HAZOP with SIL/LOPA and DSEAR support for COMAH-regulated sites.

About

4 Square Engineering Consultancy is a Scottish process-safety and engineering consultancy that provides both chair and scribe for HAZOP studies, using PHA-Pro software for real-time recording and tracking of actions. Alongside HAZOP it offers SIL assessment via LOPA and risk graph, safety instrumented system design, semi-quantitative risk assessment, PHSER project reviews, and DSEAR and COMAH support.

At a glance

RegionsUK
IndustriesChemicals, Oil & gas, Manufacturing
ServicesHAZOP chair, HAZOP scribe, SIL determination, LOPA, PHSER, DSEAR & HAC
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