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In many pipeline operations, engineers working on site often see flow variations and unsteady pressure readings caused by debris and residue inside the line. For instance, small solids and corrosion products may build up on pipe walls, causing pressure drops and even hammer effects on valves during low-flow conditions. Over time, these deposits narrow the flow path and reduce a pipeline’s efficiency while increasing its risk of internal corrosion or failure . If unchecked, this can lead to unexpected system shutdowns or leaks. In the field, a common sign of such problems is fluctuating differential pressure across control valves or hard-to-move valve stems when a pig passes. Engineers on routine inspections often note slightly increased actuator torque or brief vibration as a pig scrapes through a half-open valve. These real-world observations underscore the need for proper pigging valve selection and sizing. By choosing a suitably robust, full-port valve, operators can maintain steady