ONEOK WESTEX TRANSMISSION, LLC
gas_transmission Incident — — December 26, 2016
Incident Information
| Incident Date | December 26, 2016 |
| Operator | ONEOK WESTEX TRANSMISSION, LLC |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 31.27520, -103.07338 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
DURING AN IN-DEPTH GAS VOLUME REVIEW IN APRIL OF 2017 FOR THE ONEOK WESTEX PIPELINE SYSTEM, WESTEX IDENTIFIED A RELEASE (DESCRIBED BELOW) THAT OCCURRED IN DECEMBER 2016 AT THE ROADRUNNER COMPRESSOR STATION THAT WESTEX OPERATES. THIS WAS NOT INITIALLY RECOGNIZED AND REPORTED BY OPERATIONS AS AN EVENT THAT EXCEEDED 3MMCF, AND THEREFORE NEITHER A CALL TO NRC NOR A 30-DAY REPORT WAS MADE. BECAUSE THE DISCOVERY IN APRIL 2017 WAS FOR AN EVENT THAT OCCURRED IN DECEMBER 2016, AN NRC REPORT ALSO WAS NOT MADE IN APRIL 2017. ON 12/26/2016, AN O-RING IN A DISCHARGE PRESSURE RELIEF VALVE (PRV) ON COMPRESSOR UNIT 200 FAILED. THE FAILED O-RING DID NOT ALLOW THE VALVE TO SEAL PROPERLY AND CAUSED THE PRV TO ACTUATE. THE OPENED VALVE VENTED TO ATMOSPHERE UNTIL AN EMPLOYEE ARRIVED ON LOCATION ON 12/27/2016. THE RELIEF VALVE WAS CLOSED, THE O-RING WAS REPAIRED, AND IT WAS RETURNED TO SERVICE ON 12/28/2106.
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.