TRANSCONTINENTAL GAS PIPE LINE COMPANY
gas_transmission Incident — — February 15, 2021
Incident Information
| Incident Date | February 15, 2021 |
| Operator | TRANSCONTINENTAL GAS PIPE LINE COMPANY |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 41.51272, -77.98396 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $100 |
| Emergency Response | $0 |
| Other Costs | $650 |
Location Map
Incident Narrative
"ON MONDAY (2/15/2021) THE 535 CONTROLLER RECEIVED AN ALARM INDICATING A POSSIBLE RELIEF VALVE ACTUATION. THE CONTROLLER CALLED THE ON-CALL PERSON FOR SUPPORT AT WHO WAS ALREADY AT STATION 535. THIS PARTICULAR COMPRESSOR FACILITY IS A CONSTANTLY MANNED FACILITY. THE CONTROLLER DISCOVERED PSV 15030 FROZEN OPEN THEY PROCEEDED TO SHUT IN WITHDRAW FROM THE CPR IN ORDER TO STOP THE GAS FLOW THROUGH THE PSV. THE CONTROLLER THEN CLOSED SDV50114 TO ISOLATE THE SECTION OF PIPE CONNECTED TO PSV 15030. AT THAT TIME, PSV 15030 FULLY RESEATED AND STOPPED VENTING. THE STATION WAS RETURNED THE STATION TO SERVICE AFTER PROPER ISOLATION OF PSV 15030 WAS CONFIRMED. NRC NOTIFICATION WAS MADE UPON DETERMINATION THAT THE EVENT QUALIFIED AS A DOT INCIDENT. THE PSV WAS RETURNED TO SERVICE ON 2/15/2021. UPSTREAM OF THE PSV IS THE OPP DEVICE THAT PROTECTS THE MAOP FOR THIS SYSTEM. PSV 15030 IS NOT THE PRIMARY OVER PRESSURE PROTECTION DEVICE."
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.