As the North American oil and gas infrastructure ages, changes have been made to facilities during their lifetime, which may not have been transferred to the official recorded drawings of the facilities. Government regulations have also changed during the life of the facilities, rendering some system components noncompliant.

Forward thinking companies have decided to review facilities and correct any deficiencies and to record drawings to ensure that recorded drawings reflect the actual facility, and they have decided to perform a process hazards analysis (PHA) on the facilities to identify potential hazards and/or operability problems.

The PHAs produced a list of recommendations that are required to be acted on to resolve the issues in the recommendations. The studies indicate that significant deficiencies exist at older facilities, and those repairs and/or modifications are required. Significant cost is associated with the drawing updates, PHA processes, and recommendation resolution.

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