ANR PIPELINE CO
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | ANR PIPELINE CO |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 35.44607, -89.28548 |
Cause
| Cause | NATURAL FORCE DAMAGE |
| 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 FEBRUARY 1, 2023 A SEVERE COLD WEATHER STORM WITH HEAVY RAIN AND SNOW MIX PASSED THROUGH THE BROWNSVILLE, TN AREA. AT 02:50 CT, A MEMBER OF THE GENERAL PUBLIC AND LOCAL LANDOWNER HEARD GAS VENTING FROM BROWNSVILLE COMPRESSOR STATION YARD AND MADE A CALL TO 811, WHICH WAS DISPATCHED TO THE CALL TO TC ENERGY GAS CONTROL CENTER. IN RESPONSE, A TECHNICIAN WAS DEPLOYED TO THE COMPRESSOR STATION TO INVESTIGATE THE REPORTED EVENT. UPON ARRIVAL AT THE SITE AT 04:35 CT, THE TECHNICIAN FOUND THAT THE REGULATOR ON VALVE 501-33-J HAD FROZEN, RESULTING IN AN OPEN VALVE RELEASING GAS TO ATMOSPHERE AND MANUALLY CLOSED THE OPEN VALVE. VALVE 501-33-J IS A BLOWOFF VALVE ASSOCIATED WITH THE EMERGENCY SHUTDOWN (ESD) SYSTEM. FOLLOWING THE EVENT, STATION TECHNICIANS INSPECTED THE VALVE, POWER/PILOT GAS LINES, REGULATOR COMPONENTS, LINES, FITTINGS AND MECHANICAL FUNCTIONALITY. IT WAS DETERMINED THAT ICE FORMATION FOUND INSIDE THE REGULATOR BODY AND SPRING COMPONENTS CAUSED THE REGULATOR TO FAIL TO OPERATE AND RESULTED IN A PARTIALLY CLOSED ESD VALVE. THE VALVE REGULATOR IS EQUIPPED WITH SPARE VALVE DISK REVERSAL CAPABILITIES, AND THE SPRING-LOADED DISK WAS REPLACED AND REGULATOR PLACED BACK INTO NORMAL OPERATION ON FEBRUARY 1, 2023.
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.