Refinery MOC Safety Review and Closure Workflow
Refineries run on tightly coupled systems feed composition, heat integration, relief networks, control strategies, and human procedures all interact. When a change occurs, the Management of Change ( MOC ) process is the refinery’s mechanism for preventing unintended consequences. However, the value of MOC is realized only when safety review and closure are executed with rigor, traceability, and clear accountability. This workflow describes how a refinery can structure MOC safety review and closure so that hazid , hazop , and risk assessment outcomes translate into measurable risk management controls embedded in daily operations and sustained by process safety management . Read: What is Process Safety Management 1) MOC Initiation and Risk Screening Every MOC begins with a clear change definition: purpose, affected unit boundaries, equipment tags, control logic touched, and the operating modes impacted (startup, normal, upset, shutdown). A refinery should apply an initial sc...