MARATHON PIPE LINE LLC
hazardous_liquid Incident — — January 29, 2025
Incident Information
| Incident Date | January 29, 2025 |
| Operator | MARATHON PIPE LINE LLC |
| Commodity | REFINED AND/OR PETROLEUM PRODUCT (NON-HVL) WHICH IS A LIQUID |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 40.67634, -81.34791 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | PUMP OR PUMP-RELATED EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $7,500 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
"EAST SPARTA UNIT 6 SHUT DOWN UPON GENERATION OF A PUMP SEAL FAILURE ALARM. UNIT WAS ISOLATED AND DRAINED. MPL AND THE MANUFACTURER ARE INVESTIGATING THE CAUSE OF THE FAILURE. SEAL MATERIALS STATIONARY FACE: SILICON CARBIDE ROTATING FACE: CARBON SUPPLEMENTAL FINAL UPDATE: THE SEAL FAILURE WAS CAUSED BY A FAILURE IN THE PIN MECHANISM DESIGNED TO HOLD THE PRIMARY STATIONARY FACE IN PLACE, ALLOWING IT TO SHIFT AND BECOME MISALIGNED WITHIN THE LOCK RING. THIS MISALIGNMENT LED TO LOSS OF FLUID FILM, EXCESSIVE WEAR/HEAT, AND EVENTUAL LEAKAGE. TO PREVENT RECURRENCE, THE LOCKING MECHANISM WILL BE REDESIGNED TO SECURE THE STATIONARY FACE, AND ALL MECHANICAL SEALS FROM THIS MANUFACTURER ARE BEING REVIEWED FOR SIMILAR DESIGN FLAWS, TRACKED FOR PERFORMANCE, AND MONITORED FOR MEAN TIME BETWEEN FAILURES."
About This Pipeline Incident
Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.