ENTERPRISE PRODUCTS OPERATING LLC
gas_transmission Incident — — December 11, 2011
Incident Information
| Incident Date | December 11, 2011 |
| Operator | ENTERPRISE PRODUCTS OPERATING LLC |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.02887, -97.95594 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $120,000 |
| Emergency Response | $0 |
| Other Costs | $15,000 |
Location Map
Incident Narrative
"ON DECEMBER 11, 2011 AN ENTERPRISE PRODUCTS PIPELINE, BURNELL TO ADKINS LINE 9122, OVERPRESSURED AND HAD A FAILURE. THE OVERPRESSURIZATION WAS CAUSED TO BOTH MONITOR AND REGULATOR STATION VALVES FAILING TO FUCTION PROPERLY AT THE SAME TIME. THE PIPELINES ESTABLISHED MAOP IS 612 PSIG. DUE TO THE FAILURE OF THE PIPELINE REGULATORS THE PIPELINE WAS PRESSURED UP TO 847PSIG BEFORE FAILING. ONE CITY, PANNA MARIA, TX, LOST GAS SUPPLY FOR APPROXIMATELY 2 DAYS. THE TOTAL NUMBER OF RESIDENTS WITHOUT GAS DURING THIS TIME PERIOD WAS ABOUT TEN HOUSEHOLDS. THE PIPELINE WAS OUT OF SERVICE FOR TWENTY DAYS. IT WAS STARTED BACK UP ON DECEMBER 31, 2011. SUPPLEMENTAL/FINAL REPORT 8-7-12 THE FAILURE INVESTIGATION IDENTIFIED DEBRIS LODGED IN THE PRESSURE SENSING TUBES ON BOTH REGULATORS. THE INVESTIGATION ALL INDICATED THAT THERE WAS NOT A HIGH PRESSURE ALARM IN PLACE TO NOTIFY OF THE INCREASE IN PRESSURE. TO ADDRESS THESE ITEMS, REDUNDANT PRESSURE SENSING CONTROLS WERE INSTALLED AT THIS SITE AND A HIGH PRESSURE ALARM WAS ADDED TO THE CONTROL LOGIC."
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.