TEXAS GAS TRANSMISSION, LLC
gas_transmission Incident — — February 19, 2021
Incident Information
| Incident Date | February 19, 2021 |
| Operator | TEXAS GAS TRANSMISSION, LLC |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 32.84123, -91.95089 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | FAILURE OF EQUIPMENT BODY (EXCEPT COMPRESSOR), VESSEL PLATE, OR OTHER MATERIAL |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $400,000 |
| Emergency Response | $1,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON 2/19/2021, TEXAS GAS' GAS CONTROL RECEIVED NOTIFICATION FROM A MEMBER OF THE GENERAL PUBLIC REPORTING A LOUD NOISE AT TEXAS GAS' BLOCK VALVE YARD. FIELD OPERATIONS PERSONNEL WERE DISPATCHED AND CONFIRMED A LEAK ON TEXAS GAS' ASSET. APPROPRIATE NOTIFICATIONS WERE MADE TO AUTHORITIES AND CUSTOMERS. THE SYSTEM WAS ISOLATED AND PRESSURE RELIEVED WHILE CUSTOMER IMPACT WAS EVALUATED. ON 2/20/2021, THE SITE WAS EXCAVATED AND THE CAUSE, A CRACKED BLOCK VALVE (IDENTIFIED AS BLOCK VALVE 2), WAS IDENTIFIED. PLANS WERE MADE TO ADDRESS THE INCIDENT AND CUSTOMERS WERE UPDATED. PRESSURE WAS MAINTAINED AT APPROXIMATELY 145 PSI FROM BLOCK VALVE 2 TO BASTROP TO SUPPLY THE CUSTOMER UNTIL OUTAGE OCCURRED. ON 3/3/2021, THE BLOCK VALVE WAS REPLACED AND THE SEGMENT WAS RESTORED TO SERVICE. 6/7/2021 FINAL REPORT SUBMITTED FOR THE FOLLOWING: UPDATED TO CORRECT LAT/LONG AND 48-HOUR FOLLOW-UP NRC CALL NUMBER PER PHMSA REQUEST. UPDATED PROPERTY DAMAGE COSTS. UPDATED TO INCLUDE RESULTS OF ROOT CAUSE ANALYSIS. AFTER PERFORMING THE ANALYSIS, THE METALLURGICAL LAB CONCLUDED THAT THE FAILURE WAS LIKELY DUE TO FATIGUE THAT CONCENTRATED AT THE TOE OF A MACHINED CHAMFER. THIS CHAMFER, MEASURED AT APPROXIMATELY 60
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.