ACADIAN GAS PIPELINE SYSTEM
gas_transmission Incident — — September 6, 2020
Incident Information
| Incident Date | September 6, 2020 |
| Operator | ACADIAN GAS PIPELINE SYSTEM |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.93014, -91.06528 |
Cause
| Cause | CORROSION FAILURE |
| Subcause | INTERNAL CORROSION |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $118,000 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON SEPTEMBER 6 AT 18:18, HOUSTON CONTROL CENTER (HCC) RECEIVED A LOW-PRESSURE ALARM AT THE ELM HALL REGULATOR STATION AND A PRESSURE DROP AT THE CHAPARRAL OAKLEY STATION. THE PIPELINE WAS NOT FLOWING AT THE TIME OF THE INCIDENT. HCC CONTACTED THE OPERATIONS SUPERVISOR WHO DISPATCHED TECHNICIANS TO CLOSE THE MANUAL VALVES AT THE ENDS OF THE PIPELINE. AT APPROXIMATELY 18:33, LOCAL EMERGENCY RESPONDERS WERE NOTIFIED OF THE INCIDENT. AT APPROXIMATELY 18:57, TECHNICIANS ARRIVED ONSITE AND FOUND THE PIPELINE HAD RUPTURED IN A SUGAR CANE FIELD. THE PIPELINE WAS ISOLATED AND VENTED TO ATMOSPHERE. ON SEPTEMBER 9, 2020, THE RUPTURED PIPELINE SEGMENT WAS CUT OUT AND REPLACED. METALLURGICAL ANALYSIS INDICATED PIPE WALL THINNING OCCURRED AS A RESULT OF INTERNAL PITTING AND CREVICE CORROSION. THE POTENTIAL MECHANISM FOR THE METAL LOSS COULD BE WATER AND CHLORIDE ACCUMULATION AT THE BOTTOM OF THE PIPE. THE NRC 48 HOUR NOTIFICATION TOOK PLACE ON SEPTEMBER 8, 2020 AT 17:26 CST, #1286817
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.