PSI is valuable only if it is correct, up to date, accessible, and used. PSI is collected from many places inside and outside operational sites, including research and development, engineers, operators, suppliers, handlers, reports The Beacon.
Operator and maintenance people should be involved in a Process Hazard Analysis, PHA. PSI is often in a stack of drawings, manuals, documents, and books informing the PHA team.
PS change management
PSI is often used in Management of Change (MOC) reviews. Employees should understand the existing system, to evaluate consequences of proposed changes.
For example, new valves must meet specifications for the pipe where it is installed. Valves, gaskets, bolts, and other components must be in line with design changes. Verify these according to piping specifications in PSI from the plant engineering design.
Investigations and PPE requirements
Other important examples of PSI include piping and instrumentation drawings, hazardous area classification drawings, reports from process hazard analyses, management of change reviews, incident investigations, personal protective equipment requirements, operating and maintenance procedures.
PSI check examples
Check your PSI for your plant regularly, using procedures like these examples;
• Updating piping drawings is serious work. A valve not shown on the drawing may save a life or prevent a spill. You could not close it if you did not know it was there.
• Operation differing from written procedure, must be reported. Modify operation or procedure to remain in line.
• Find and report errors on drawings.
• Drawings with many corrections require new drawings, verification of the new set, and replacement of older sets.
• Control system documentation is part of the PSI and must be updated when changes are made.
* Source; The Beacon, Sep 2010, AIChE.