Inspection
Work Planning
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A defined operating limit established to minimize equipment degradation and preserve mechanical integrity throughout the asset lifecycle.
An Integrity Operating Window (IOW) defines the operating limits within which equipment must be maintained to control degradation mechanisms and ensure continued mechanical integrity. IOWs establish acceptable ranges for process variables such as temperature, pressure, flow, corrosion rate, pH, chemical composition and other operating conditions that influence equipment deterioration. Exceeding an IOW may trigger investigation, corrective action or additional inspection.
Integrity Operating Windows provide operational limits that protect equipment from accelerated degradation and support long-term mechanical integrity.
IOWs are developed using engineering analysis, process knowledge and historical operating data and are integrated into integrity management programs, operating procedures and plant monitoring systems to proactively manage equipment health.
An Integrity Operating Window focuses on preventing equipment degradation, whereas an Operating Envelope defines the broader safe operating limits required for reliable process operation.
Mechanical Integrity; Process Safety; Operations.
Process plants.; Refining.; Petrochemical facilities.; Corrosion management.; Asset integrity.
API RP 584
VisualAIM connects glossary concepts to the asset records, inspection histories, and workflows they describe.
