COLUMBIA GAS TRANSMISSION CORP
gas_transmission Incident — — February 27, 2011
Incident Information
| Incident Date | February 27, 2011 |
| Operator | COLUMBIA GAS TRANSMISSION CORP |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 37.65469, -82.03597 |
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
ON FEBRUARY 27TH, 2011 AT APPROXIMATELY 10:30, GAS CONTROL NOTICED A LOSS IN PRESSURE AT GRANT COMPRESSOR STATION. COMPANY PERSONNEL WERE NOTIFIED AND REPORTED ON SITE AT 11:00 AM. A BLOW DOWN VALVE WAS FOUND OPEN AND VENTING GAS TO ATMOSPHERE. THE VALVE WAS MANUALLY SHUT. THE SITE WAS SECURED AT 11:30 . AN INVESTIGATION INTO THE CAUSE OF THE FAILURE WAS INITIATED AND THE RELIEF VALVE ON THE SCHAFER OPERATING SYSTEM WAS FOUND TO BE LEAKING AND BLOCKED WITH DEBRIS. THE PLUGGED/MALFUNCTIONING RELIEF VALVE WAS REPLACED WITH A NEW ONE. SYSTEM WAS PLACED BACK IN SERVICE AND ALL NEEDED HORSEPOWER WAS PUT BACK ON LINE AT 13:15. A ROOT CAUSE ANALYSIS REPORT WAS INITIATED AND THE FOLLOWING RECOMMENDATIONS WERE REPORTED. MODIFY MAINTENANCE PLAN TO INCLUDE THOSE RELIEF VALVES. CURRENT RECOMMENDATION IS TO REPLACE THESE VALVES ONCE A YEAR DURING THE ANNUAL ESD TEST. THIS RECOMMENDATION NEEDS TO BE SHARED WITH ALL STATIONS IN NGT&S THAT MAY HAVE SIMILAR SCHAFER OPERATOR CONFIGURATIONS.
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.