UPDATING THE PROCESS HAZARD ANALYSIS

Each PrHA must be updated and revalidated at least every 5 years to make sure it accurately reflects current processes and operating experiences. 

The order in which the initial PrHAs are performed is based on the level of perceived risk. Initial PrHAs must be completed, at least, in increments of 25 percent, as shown in Table 7.1. A 5-year review schedule should be based on the initial rankings. Following this schedule means that PrHA updates are completed annually for at least one-fourth of the processes. 

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