ENTERPRISE PRODUCTS OPERATING LLC
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | ENTERPRISE PRODUCTS OPERATING LLC |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 30.00885, -97.41884 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
ON 3/4/2015 AT 23:00 THE 8 INCH RELIEF VALVE AT THE HILBIG REGULATOR STATION FOR LINE 36 PREMATURELY ACTUATED VENTING NATURAL GAS TO THE ATMOSPHERE. A NEARBY RESIDENT REPORTED THE EVENT TO ENTERPRISE PIPELINE CONTROL AT 23:08 AND AN ENTERPRISE TECHNICIAN WAS DISPATCHED TO THE HILBIG REGULATOR STATION. UPON TECHNICIAN'S ARRIVAL AT 00:05 ON 3/5/2015, THE TECHNICIAN FOUND THE RELIEF VALVE HAD RESET ITSELF. UPON FURTHER INVESTIGATION, IT WAS DISCOVERED THAT THE RELIEF VALVE OPERATED PREMATURELY BELOW ITS SET POINT. THE CAUSE FOR THE PREMATURE ACTUATION WAS DUE TO HYDRATES FREEZING IN THE PILOT REGULATOR/SENSING LINE. LATER ON 3/5/2015, THE RELIEF VALVE WAS TESTED SEVERAL TIMES AND FUNCTIONED PROPERLY EACH TIME AT THE DESIRED SET POINT. THE CORRECTIVE ACTION TO PREVENT FUTURE RECURRENCE INCLUDES REPLACING PILOT WITH ONE MORE SUITABLE FOR COLDER TEMPERATURES AND INSTALLING A KNOCK-OUT CYLINDER IN SENSING LINE. CORRECTIVE ACTION TAKEN: INSTALLED NEW REGULATOR WITH FILTER.
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.