oversgas
Oversgas is a term used in process and safety engineering to describe a transient condition in gas-handling systems where gas pressure or flow temporarily exceeds the intended setpoint. It arises when the response of valves, actuators, and control loops lags behind a demand change, causing an overshoot before the system settles to the desired operating point. The phenomenon can occur in pipelines, reactors, purging sequences, or any closed-loop gas system.
Causes of oversgas include control-loop instability, valve stiction or saturation, compressor surge, upstream supply disturbances, and
Impacts range from unnecessary energy use and process deviations to increased mechanical stress on equipment and
Management and mitigation rely on robust process control and hardware design. Techniques include proper PID tuning
See also: process control, gas safety, venting and relief systems.