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Page Title:
Table 4.15 Example HAZOP Study Process Parameters and Deviations |
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|  DOE-HDBK-1100-2004
Table 4.15 Example HAZOP Study Process Parameters and Deviations
PROCESS
PROCESS
DEVIATION
DEVIATION
PARAMETER
PARAMETER
No flow
Too long
Flow (rate)
Time
High flow
Too short
Low flow
Too late
Reverse flow
Too soon
Too much
Omit a step
Flow (quantity)
Sequence
Too little
Steps reversed
Extra step
High pressure
High pH
Pressure
pH
Low pH
High viscosity
High temperature
Viscosity
Temperature
Low viscosity
Low temperature
High level/overflow
High heat value
Level
Heat Value
Low level/empty
Low heat value
Too much mixing
Extra phase
Mixing
Phases
Not enough mixing
Phase missing
Loss of agitation
Reverse mixing
Component missing
Additional source
Location
High concentration
Additional destination
Low concentration
Wrong source
Wrong destination
Impurities present
No reaction
Purity
Reaction
Catalyst
Too little reaction
deactivated/inhibited
Too much reaction
Reaction too slow
Reaction too fast
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