TRANSCONTINENTAL GAS PIPE LINE COMPANY
gas_transmission Incident — — October 28, 2019
Incident Information
| Incident Date | October 28, 2019 |
| Operator | TRANSCONTINENTAL GAS PIPE LINE COMPANY |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 31.58280, -89.49620 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | NON-THREADED CONNECTION FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $80,000 |
| Emergency Response | $1,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON 10/28/2019 AT APPROXIMATELY 1:15 PM, GAS WAS HEARD RELEASING FROM THE 70-30 VALVE YARD. THE RELEASE WAS DETERMINED TO BE IN THE VICINITY OF THE MAINLINE A BLOCK VALVE IN THE 70-30 VALVE YARD. THE AREA NEAR THE CO2 CROSSOVER VALVE WAS HAND EXCAVATED AND BUBBLING WAS OBSERVED IN RAIN/WATER PUDDLE NEAR THE CO2 CROSSOVER VALVE AND 16 INCH INSULATING FLANGE. THE WILLIAMS' SECURITY OPERATIONS CENTER WAS CONTACTED AND NRC NOTIFICATION 1262447 WAS MADE AS IT WAS DETERMINED REPAIR COSTS WOULD BE EXPECTED EXCEED $50,000. THE DOWNSTREAM CROSSOVER HEADER WAS ISOLATED, BLOWN DOWN, AND LEAKING CEASED. THE AREA NEAR THE CO2 CROSSOVER VALVE AND 16 INCH INSULATING FLANGE WAS EXCAVATED. THE GASKET WAS REPLACED AND THE 16 INCH FLANGE WAS TIGHTENED TO SPECIFICATIONS. THE DOWNSTREAM CROSSOVER HEADER WAS PRESSURED UP AND LEAK TESTED. NO FURTHER RELEASE OF GAS WAS IDENTIFIED. THE EXCAVATED AREA WAS PROPERLY BACK-FILLED AND DOWNSTREAM CROSSOVER HEADER WAS BROUGHT BACK ON LINE."
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.