TRUNKLINE GAS CO
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | TRUNKLINE GAS CO |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 30.59601, -93.22704 |
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 APRIL 30, 2024 AT APPROXIMATELY 5:52 PM, GAS CONTROL RECEIVED AN ALARM AND DISPATCHED ETE PERSONNEL TO THE LONGVILLE COMPRESSOR STATION. ETE FOUND THE ESD SYSTEM HAD BEEN SET OFF AND THE STATION WAS BLOWING GAS. MAIN FIRE GATE VALVE DID NOT SEAL OFF AND CONTINUED TO BLOW GAS FOR AN ADDITIONAL FORTY-THREE MINUTES UNTIL EMPLOYEES DETERMINED WHICH FIRE GATE VALVE WAS CAUSING THE STATION NOT TO BLOW DOWN. IT WAS DETERMINED THAT THE ESD SYSTEM WAS TRIGGERED BY A FAULTY WIRE CAUSED THE GAS DETECTION SYSTEM TO THE SOUTH GAS DETECTOR ON 4509 TO INDICATE A FALSE READING WITH UP TO 50% LEL AND OVER RANGE. AFTER FURTHER INVESTIGATION, IT WAS DETERMINED AT 4:15 PM ON MAY 1, 2024 APPROXIMATELY 67.68 MMSCF OF NATURAL GAS WAS RELEASED TO THE ATMOSPHERE. MAIN FIRE GATE PLUG VALVE WAS DISASSEMBLED, INSPECTED, REASSEMBLED AND GREASED, TESTED FOR FUNCTIONALITY AND SEALING OFF AGAINST POSITIVE PRESSURE. EQUIPMENT WAS RETURNED TO SERVICE. SUPPLEMENTAL/FINAL -UPDATED TIME IN A4 & A16A -UPDATED C3 TO VALVE
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.