Undertaking the HAZOP study
- A study team will consider part of a process
design for a number of deviations and guide words thus a study meeting
will follow through a series of steps repeatedly. The sequence of action
for the HAZOP can be represented as below :
- There are seven stages that are repeated many times during the HAZOP :
- a) Apply the guideword
b) Develop a deviation
c) Examine possible causes
d) Examine possible consequences- e) Consider hazards or operability problems
f) Decide upon action
g) Make a record of the discussion and decision - e) Consider hazards or operability problems
- When a study team decides that major redesign of a plant section is necessary it records the parameters for the redesigning and a HAZOP review is required when the redesign is complete.
- When the information data base contains a questionable fact it is best to assume that it is correct and note the appropriate action with a rider to the effect that the data should be verified first.
- If the leader or any team member believes that a particular system or P & ID should not be studied by the team either because it is identical to the system already studied or because it involves no additional hazards, this must be agreed upon by the team and the reasons recorded in the report.
- There are seven stages that are repeated many times during the HAZOP :
