ACADIAN GAS PIPELINE SYSTEM
gas_transmission Incident — — May 5, 2021
Incident Information
| Incident Date | May 5, 2021 |
| Operator | ACADIAN GAS PIPELINE SYSTEM |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.89681, -92.06504 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $1,000 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON MAY 5, 2021 AT 22:08, ENTERPRISE OPERATIONS SUPERVISOR RECEIVED A PHONE CALL REPORTING A RELIEF VALVE DISCHARGE ON THE 30 INCH INLET PIPELINE TO THE SEA ROBIN GAS PLANT. THE SEA ROBIN OPERATIONS PERSONNEL VERIFIED THE PIPELINE PRESSURE WAS BELOW MAXIMUM ALLOWABLE OPERATING PRESSURE (MAOP) AND ISOLATED THE RELIEF VALVE TO STOP THE DISCHARGE. ON MAY 6, 2021 AT 01:38, ENTERPRISE DETERMINED THE INCIDENT TO EXCEED ESTIMATED REPORTABLE VOLUME REQUIREMENTS AND REPORTED TO THE NRC AT 02:31. THE VOLUME ESTIMATES WERE REDUCED BASED ON ADDITIONAL INFORMATION AFTER THE 48-HOUR NOTIFICATION. AFTER FURTHER INVESTIGATION OF THE PILOT VALVE, IT WAS DETERMINED THAT FLUID CONTAMINATED THE PILOT VALVE AND ALLOWED THE RELIEF VALVE TO ACTIVATE BEFORE THE MAOP SETTING. A NEW RELIEF VALVE AND ANDERSON GREENWOOD PILOT WAS INSTALLED TESTED AND PLACED INTO SERVICE. THE LA DNR WAS NOTIFIED ON 5/6/2021 AT 00:58. THE 48-HOUR UPDATE TO THE NRC TOOK PLACE ON 5/7/2021 AT 13:30 #1304523. THE NRC INCORRECTLY ENTERED RELEASED MATERIAL ON REPORT #1304523 AND ISSUED A CORRECTED REPORT #1304524.
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.