FMEA for Submersible Pumps

FMEA for submersible pumps starts by listing all functions, then identifying how each function can fail, what causes each failure mode, and what the effects would be on safety, operations, and maintenance. Each mode receives severity, occurrence, and detection ratings that multiply into a risk priority number. Modes exceeding the RPN threshold receive specific mitigation actions with assigned owners.

The FMEA for submersible pumps should be reviewed after any failure that reveals a previously unidentified failure mode, after design modifications to the submersible motor, impeller stages, thrust bearing, and cable assembly, and at minimum annually as part of the reliability program review. Operating experience and new condition monitoring data may reveal that occurrence or detection ratings need adjustment, changing the prioritization of mitigation actions.

Three triggers. First: rising trend on any key measurement (vibration amplitude up 30 percent over six months, wear metals climbing, IR megger declining). Second: a recent repair on the asset — post-repair baseline needs reconfirmation. Third: a process upset that may have exposed the equipment to conditions outside design (overload, contamination, thermal event). Any of the three justifies a 60-90 day check instead of waiting for the next scheduled analysis on new assets and after major modifications round.

Severity × occurrence × detection (RPN). For Submersible Pumps specifically, the signals to watch are IR megger decline, motor amp drift, flow degradation. A typical FMEA report on Submersible Pumps reports against the SAE J1739 and AIAG-VDA FMEA Handbook framework. Findings tie back to specific failure modes from the Submersible Pumps failure population: bearing failure, seal degradation, motor insulation.