WILLIAMS GAS PIPELINE - TRANSCO
gas_transmission Incident — — February 10, 2010
Incident Information
| Incident Date | February 10, 2010 |
| Operator | WILLIAMS GAS PIPELINE - TRANSCO |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.46089, -93.38698 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | THREADED CONNECTION/COUPLING FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $5,000 |
| Emergency Response | $250,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
6"" STRINER LID (YALE CAP CLOSURE) FAILED ALLOWING CONDENSATE AND GAS TO ESCAPE TO THE ATMOSPHERE. OPERATOR ON DUTY ISOLATED STRAINER POT WITH VALVING UPSTREAM AND DOWNSTREAM. GAS LOSS WITH CONDENSATE/SALTWATER WAS RELEASED. METALURGICAL REPORT REVEALED THE FOLLOWING FINDINGS: SEVERAL CIRCUMSTANCES WORKED IN COMBINATION TO ALLOW THE CAP TO FAIL AND COME OFF OF THE BARREL. THERE WAS A LOSS OF FIT-UP BETWEEN THE MATING THREADS ON THE CAP AND BARREL AS A RESULT OF CORROSION, WEAR, AND PRIOR MECHANICAL DAMAGE (POSSIBLE OVER-TIGHTENING AND/OR CROSSTHREADING).
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.