Process Safety Gap Assessment
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A process Safety Gap Assessment is carried out to understand gaps in 100 % inherently safe virtual design against actual process design at site.
Although, this assessment is not intended to fully undertake a Process safety gap assessment the miniature analysis can be carried out to understand weather the full exercise is required at site or not.
A process safety gap analysis involves identification of deviations that can lead to
1. Containment failure of chemical process due to
- Runaways,
- Design pressure inadequacy,
- Pressure relief system inadequacy (includes improper maintenance and design of the same),
- Heating utility system control failure,
- Etc.
2. Ignition of flammable atmosphere
- Presence of ignition sources + flammable atmosphere + oxidants together
3. Exposure to personnel, unintentional loss of environment due to
- Lack of diligence to the same in design
- Failure of containment of system due to faulty design, inadequate upkeep
One such example questionnaire for verifying the above is provided below:
1. Weather the pressure relief system design is adequate or not in terms of
- Materials of construction,
- Design pressure of vessel for which pressure protection provided,
- Installation philosophy
- Set pressures,
- Design cases considered (external fire, utility failures, electrical over heating, etc.)
- Containment of material ejected from pressure protection devices,
- Etc.