MAGELLAN OPERATING COMPANY, LLC
hazardous_liquid Incident — — August 28, 2019
Incident Information
| Incident Date | August 28, 2019 |
| Operator | MAGELLAN OPERATING COMPANY, LLC |
| Commodity | REFINED AND/OR PETROLEUM PRODUCT (NON-HVL) WHICH IS A LIQUID |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 29.72993, -95.16130 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $17,500 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON 8/27/19, IN PREPARATION FOR NEW VALVE INSTALLATIONS, A 42"" TANK VALVE WAS CLOSED TO ISOLATE TANK 1606 FROM NEW CONSTRUCTION ACTIVITIES AT THE PASADENA WATERFRONT FACILITY. ADDITIONAL VALVES WERE LOCKED OUT/TAGGED OUT TO ISOLATE THE TANK LATERAL AND THE LINE WAS DRAINED UP. ON 8/28/19, LOCAL OPERATIONS OBSERVED PRODUCT LEAKING FROM A 2"" VENT VALVE LOCATED ON TOP OF THE LATERAL LINE. FURTHER INVESTIGATION OBSERVED PRODUCT ALSO BEING RELEASED FROM THE FLANGE CONNECTION ON A NEW 36"" VALVE LOCATED ON THE TANK LATERAL IN THE MANIFOLD VAULT. THE RELEASED PRODUCT WAS FULLY CONTAINED WITHIN A CONCRETE VAULT AREA. CLEANUP ACTIVITIES WERE INITIATED. LOTO WAS REMOVED FROM THE 42"" TANK VALVE. THE TANK VALVE WAS FURTHER TIGHTENED, THUS STOPPING ADDITIONAL PRODUCT FROM BEING RELEASED AT THE LEAK SITE. ACIDENT INVESTIGATION REVEALED THE ACTUATOR HAD BEEN SET TO CLOSE BASED ON POSITION WHICH LED TO INCOMPLETE CLOSURE OF THE VALVE. PRODUCT MIGRATED FROM THE TANK INTO THE SECTION OF LINE WHERE NEW VALVES WERE BEING INSTALLED. CONSTRUCTION ACTIVITIES PLANNED FOR THE DAY WERE TO INCLUDE PROPER FIT UP AND FINAL TORQUEING OF THE VALVE FLANGES. SINCE THE NEW VALVE FLANGES HAD NOT BEEN COMPLETELY TORQUED, A RELEASE OCCURRED IN THE FLANGE CONNECTION OF A NEW 36"" VALVE. THE ACTUATOR ON THE 42"" VALVE WAS ADJUSTED TO INCREASE THE TORQUE. THE VALVE WAS CYCLED AND VERIFIED IT SEATS PROPERLY. SIMILAR NEW CONSTRUCTION WORK (INSTALLATION OF NEW VALVES ON TANK LATERALS) HAS BEEN PERFORMED AT THIS FACILITY WITHOUT INCIDENT, WITH OTHER TANK VALVES HOLDING BACK PRODUCT AND SEATING PROPERLY. SUPPLEMENTAL/FINAL 11/20/19: UPDATED PART G6-6 AND PART H
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.