WILLIAMS GAS PIPELINE - TRANSCO
gas_transmission Incident — — December 30, 2010
Incident Information
| Incident Date | December 30, 2010 |
| Operator | WILLIAMS GAS PIPELINE - TRANSCO |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.11111, -94.40417 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | THREADED CONNECTION/COUPLING FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $154,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON 12/30/2010 AT 10:45, GAS CONTROL WAS NOTIFIED BY USCG THAT BUBBLES WERE REPORTED NEAR A WILLIAMS PIPELINE IN BLOCK HI206. A DIVE BOAT WAS MOBILIZED TO INVESTIGATE BUBBLES. DIVERS FOUND A 1"" PLEECO BLEEDER VALVE LEAKING GAS FROM VALVE LW856 BLIND FLANGE. SUB-SEA ASSEMBLY VALVE LW855 & LW856 WERE CLOSED AND PIPING BLED DOWN. THREADS WERE DAMAGED/CUT BY GAS LEAK THAT INCREASED IN SEVERITY OVER TIME. 1"" PLEECO BLEEDER VALVE WAS REPLACED. SUB-SEA ASSEMBLY WAS REPRESSURED, VERIFIED NO LEAKS AND JOB WAS COMPLETED. THIS IS A RARE OCURRENCE AND IF FUTURE SIMILAR FAILURES OCCUR THE ASSESSMENT OF COMPREHENSIVE CORRECTIVE ACTION WILL BE REVISITED.
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.