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HAZOP Worksheet Builder
Build structured HAZOP worksheets with guide words, risk ranking, and action items. Export to CSV for your study records.
Multi-node HAZOP structure
Standard IEC 61882 guide words
Risk ranking (S × L matrix)
Action item tracking
Export CSV for records
Print-ready report
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HAZOP
Worksheet Builder

Build structured HAZOP worksheets per IEC 61882. Define study nodes, apply guide words to process parameters, assess consequences, record safeguards, and generate action items — all in one shareable, printable document.

IEC 61882Multi-node Guide WordsRisk S×L Matrix Action TrackingCSV Export
IEC 61882 Guide Words
No/NoneMoreLess As Well AsPart OfReverse Other ThanEarlyLate BeforeAfter
📋 Study Details
0 rows 0 High 0 Med 0 Low

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Click + Add Node to define your first process node (e.g., "Feed line to reactor", "Separator overhead", "Pump P-101 discharge").
Each node gets its own set of deviations.

📚 HAZOP Reference — Guide Words, Risk Matrix & Parameters ▸ Expand
IEC 61882 Guide Words
Guide WordMeaning
No / NoneComplete negation of design intent
MoreQuantitative increase (flow, temp, pressure…)
LessQuantitative decrease
As Well AsQualitative increase — additional activity/component
Part OfQualitative decrease — only some of the intent
ReverseLogical opposite of the intent (reverse flow)
Other ThanComplete substitution — different material/phase
EarlyOccurs sooner than intended (relative to time)
LateOccurs later than intended
BeforeOccurs before in sequence
AfterOccurs after in sequence
Typical Process Parameters
ParameterCommon Deviations
FlowNo, More, Less, Reverse
TemperatureMore (high), Less (low)
PressureMore (high), Less (low), No
LevelMore (high), Less (low), No
CompositionAs Well As, Part Of, Other Than
PhaseOther Than (two-phase, solid)
Reaction rateMore (runaway), Less, No reaction
Time / SequenceEarly, Late, Before, After, Reverse
Agitation / mixingNo, Less, More, Reverse
Risk Matrix (Severity × Likelihood)
S = Severity (1=Negligible→4=Catastrophic) · L = Likelihood (1=Rare→4=Frequent)
L=1
L=2
L=3
L=4
S=4
4M
8H
12H
16H
S=3
3L
6M
9H
12H
S=2
2L
4L
6M
8H
S=1
1L
2L
3L
4M
H ≥9 — Immediate action M 4–8 — Action required L ≤3 — Monitor/acceptable

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This tool supports study preparation and record-keeping. A formal HAZOP per IEC 61882 / IEC 61511 requires a qualified, independent facilitator and a multidisciplinary team. SafeGuard Projects has led HAZOP studies across refinery, chemical, and midstream capital projects.

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