NUSTAR PIPELINE OPERATING PARTNERSHIP L.P.
hazardous_liquid Incident — — January 31, 2021
Incident Information
| Incident Date | January 31, 2021 |
| Operator | NUSTAR PIPELINE OPERATING PARTNERSHIP L.P. |
| Commodity | HVL OR OTHER FLAMMABLE OR TOXIC FLUID WHICH IS A GAS AT AMBI |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 30.08247, -90.92077 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $500 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
AT APPROX. 8:40 AM NUSTAR TECHNICIAN IN COMMUNICATION WITH MOSAIC OPERATIONS RECEIVED WORD OF AN AMMONIA RELEASE TO NUSTAR'S FLARE. THE RELEASE WAS ORIGINATING FROM NUSTAR'S LINE PRESSURE RELIEF VALVE. NUSTAR TECHNICIAN IMMEDIATELY INFORMED NUSTAR CONTROL CENTER TO SHUTDOWN DELIVERY TO MOSAIC. NUSTAR OPERATOR INFORMED THE MOSAIC OPERATOR TO ISOLATE NUSTAR'S RELIEF VALVE. RELEASE VOLUME WAS ESTIMATED AT 100 POUNDS. ALL AGENCY NOTIFICATIONS WERE MADE. UPON ARRIVAL TO THE FACILITY, NUSTAR'S TECHNICIAN DETERMINED THAT THE LINE PRESSURE RELIEF VALVE HAD FAILED. NUSTAR TECHNICIAN REMOVED THE FAILED RELIEF VALVE AND INSTALLED A NEW ONE AND VERIFIED THAT IT OPERATED AT THE CORRECT PRESSURE SETTING. NUSTAR TECHNICIAN ALSO VERIFIED THAT THE METER PRESSURE SWITCH, LINE PRESSURE SWITCH AND CUSTOMER FAULT SWITCH WERE OPERATING PROPERLY AND ALL ASSOCIATED INTERLOCKS WERE ALSO OPERATING PROPERLY. AFTER THE RELIEF VALVE WAS REPLACED DELIVERIES TO MOSAIC WERE RESUMED TO NORMAL.
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.