EXXONMOBIL PIPELINE COMPANY LLC
hazardous_liquid Incident — — October 11, 2024
Incident Information
| Incident Date | October 11, 2024 |
| Operator | EXXONMOBIL PIPELINE COMPANY LLC |
| Commodity | HVL OR OTHER FLAMMABLE OR TOXIC FLUID WHICH IS A GAS AT AMBI |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 30.25709, -91.25911 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | NON-THREADED CONNECTION FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $197,000 |
| Emergency Response | $24,100 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON OCTOBER 11, 2024 AT APPROXIMATELY 9:20 AM, AN ETHYLENE RELEASE TO ATMOSPHERE WAS DISCOVERED FROM LA-78. WORK HAD BEEN CONDUCTED TO REPLACE A BLOCK VALVE AND DURING RECOMMISSIONING OF THE PIPELINE THERE WAS A LEAK AT THE FLANGE CONNECTION. AT TIME OF RELEASE, THE SECTION OF PIPING WAS ALREADY ISOLATED, AND ETHYLENE WAS BEING FLARED AS A PART OF MAINTENANCE ACTIVITIES. AN ESTIMATED 13,300 LBS. OF ETHYLENE WAS RELEASED TO THE ATMOSPHERE. SUPPLEMENTAL UPDATE: INVESTIGATION DETERMINED THAT MISALIGNED FLANGES CAUSED UNEVEN LOADING ON THE GASKET AND PREVENTED A COMPLETE SEAL. PART E9B: ANSWERED ""NO"" TO THIS QUESTION BECAUSE MOTOR OPERATED VALVES WERE CLOSED AND POWERED OFF DUE TO THE MAINTENANCE ACTIVITIES AS DESCRIBED ABOVE."
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.