ONEOK GAS TRANSPORTATION, LLC
gas_transmission Incident — — February 7, 2019
Incident Information
| Incident Date | February 7, 2019 |
| Operator | ONEOK GAS TRANSPORTATION, LLC |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 35.74738, -97.63883 |
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
THURSDAY FEBRUARY 7TH AT 3:00 AM THE 8' RELIEF VALVE PROTECTING A-4002 FROM A-1129 WENT OFF AT 729 PSI WITH A 740 PSI SET POINT. MERCER VALVE HAD TESTED THE RELIEF VALVE WEDNESDAY FEBRUARY 4TH. THE EVENT LASTED FOR 15 MINUTES AT 729 PSI THROUGH A 8' RELIEF WITH AN APPROX. 6MMCF GAS LOSS. MERCER HAS RETESTED THE RELIEF VALVE AND FOUND TO BE SET AT 740 PSI SET POINT. THE FREEZING COLD TEMPERATURES AND PRESSURES WITHIN 11 PSI OF MAOP MAY HAVE BEEN THE LEADING CAUSE OF EVENT.
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.