HAZOP and HAZID Studies
We run IEC 61882 guide word process hazard analysis, the workhorse study that anchors every risk decision that follows
HAZOP and HAZID
Studies
HAZOP and HAZID remain the most rigorously codified hazard identification techniques in the process industry, drawing on IEC 61882 for HAZOP, ISO 17776 for offshore HAZID and the CCPS Guidelines for Hazard Evaluation Procedures. A well run HAZOP is the upstream feedstock for LOPA, for SIL determination under IEC 61511, for Bow Tie barrier mapping and for the structure of your safety case argument. The value of the technique depends entirely on three execution disciplines that our team takes seriously, namely the independence and competence of the study leader, the quality of the P and IDs and the way nodes are selected, and the traceability of every recommendation through to close out. Recurring failure modes across the industry, including recycle loop blindness, neglect of batch modes, gaps on low frequency high consequence scenarios and underweighting of human factors, are what separate a defensible process hazard analysis from a paper exercise.
How the study is executed
A structured, facilitated process that runs from scope definition through close out and produces defensible, actionable outputs.
Confirm P&ID revision freeze, mark up node boundaries and study limits, verify HAZOP pre requisites, line list, equipment datasheets, MSDS, operating envelopes, and cause effect matrix, are issued for review before session kickoff.
Facilitate Study 1/2 HAZID at FEED using block flow diagrams, identify major hazard categories (inventory, reactivity, siting, layout, transport, utilities failure), issue concept hazard register as input to QRA / Bow Tie scoping.
Apply full IEC 61882 guide word × process parameter matrix per node, address reactive, batch, transient, and low frequency modes, document cause, consequence, safeguard, action with IPL credit pre screening per CCPS eligibility criteria.
Classify actions per CCPS R/I/D categories, assign risk matrix likelihood/consequence rating, identify High Priority actions requiring engineering response vs informational and deferred items, build close out tracking dashboard.
Screen safeguards against CCPS IPL independence, dependability, audit, and validation criteria, compile IPL eligibility register and handover dataset for LOPA, SIL allocation, and Bow Tie barrier identification.
Issue PHA Pro/Easy HAZOP workbook with full audit trail, node mark up set, action register, human factor dependency record, and revalidation trigger matrix covering MOC, 5 year statutory cycle, and event driven triggers.
What the study covers in full
Outcomes of HAZOP and HAZID Studies
- We surface the failure modes that escape walk through, what if and checklist methods
- We challenge silent design assumptions through rotating discipline scrutiny
- We anchor your LOPA, SIL and Bow Tie argument with traceable scenario data
- We build the abnormal and emergency chapters of your operating procedures from the real deviations we find
- We satisfy the OSHA PSM 1910.119(e) PHA element with worksheets that hold up to inspection
- We meet the IEC 61511 Clause 8 hazard and risk analysis prerequisite for your SIL claims
- We anchor the demonstrate ALARP argument in your COMAH and Seveso III safety case
- We give you documentation that satisfies Indian PESO, MoEFCC and CPCB scrutiny
- We catch the operability gaps that cause first year commissioning shortfalls
- We define the basis for trip settings, alarm priorities and operator action expectations
- We build the abnormal situation library that feeds your operator training simulator scenarios and shift drills
- We reduce MOC re litigation by establishing a defensible baseline scenario set
- We sequence HAZID then HAZOP so design issues are caught at FEED where they cost 10 to 100 times less to fix
- We help you avoid the post startup retrofit pattern documented at the Texas City cat cracker and the Buncefield tanks
- We help trim underwriter loadings through demonstrable study quality and close out rigour
- We keep you off the OSHA citation pathways tied to inadequate PHA execution and stale revalidations
Codes & standards we work to
Triggers that signal the need
Where HAZOP and HAZID Studies applies
Wellheads, separators, gas compression, FPSO topsides, produced water systems.
Distillation columns, reactors, heat exchangers, storage spheres, LPG handling.
Cryogenic exchangers, liquefaction trains, BOG compressors, storage and sendout.
Reactive systems, batch reactors, solvent handling, runaway reaction scenarios.
Boilers, HRSGs, steam headers, hydrogen systems, ammonia SCR units.
Sterile vessels, CIP/SIP, pressure fermenters, solvent recovery, spray dryers.
Tangible deliverables
- HAZOP and HAZID study workbook in PHA Pro, Easy HAZOP or an equivalent tool with a full audit trail
- P and ID node mark up set with study boundaries
- Action register classified per the CCPS recommended, information and deferred scheme with priority and ownership
- IPL eligibility matrix that feeds the LOPA workflow
- Cause, consequence and safeguard table per node
- Operator action and human factor dependency register
- Revalidation trigger matrix and five year schedule
- Close out tracking dashboard with risk rank gating
- Independent chair facilitation report and team competency record
Ready to start your project?
Speak with our team to scope an engagement tailored to your facility, regulatory context, and lifecycle stage.