ENABLE GAS TRANSMISSION, LLC
gas_transmission Incident — — May 5, 2020
Incident Information
| Incident Date | May 5, 2020 |
| Operator | ENABLE GAS TRANSMISSION, LLC |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 34.43422, -92.90370 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | THREADED CONNECTION/COUPLING FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $500 |
| Emergency Response | $500 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON MAY 5TH, 2020 AT 18:30 ENABLE GAS TRANSMISSION SYSTEM CONTROL RECEIVED AN ALARM THAT A RELIEF WAS VENTING AT THE LAKE CATHERINE POWER PLANT. AT 18:35 AN ENABLE O&M TECH WAS DISPATCHED TO THE SCENE. THE O&M TECH REPORTED THAT THE RELIEF VALVE BELONGED TO ENABLE (BM-28) AND CONFIRMED IT WAS VENTING WHEN HE ARRIVED. THE RELIEF WAS ISOLATED AT 19:20 CEASING THE GAS RELEASE. A 3/4' BROKEN NIPPLE ON A GAS SENSING LINE IS THE CAUSE FOR THE MALFUNCTION. IT WAS DETERMINED BY FIELD ENGINEERS THE NIPPLE MOST LIKELY FAILED DUE TO A MIXTURE OF VIBRATION AND THE LENGTH OF THE NIPPLE. THE NIPPLE WAS REPLACED, AND FIELD ENGINEERING IS ACQUIRING A SPECIAL TEST VALVE FOR REPLACEMENT TO ELIMINATE THE POSSIBILITY OF THIS INCIDENT HAPPENING AGAIN. THE GAS RELEASE WAS CONFIRMED TO BE OVER 3,000 MCF ON MAY 5TH AT 21:24 PROMPTING THE NRC TO BE NOTIFIED (MAY 5TH AT 22:04 CST # 1276720). A FINAL GAS LOSS TOTAL (4,862 MCF) WAS DETERMINED ON MAY 6TH AND PROVIDED TO THE NRC DURING THE 48 HOUR FOLLOW UP (MAY 7TH AT 8:12 CST #1276794).
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.