ENABLE GAS TRANSMISSION, LLC — Gas transmission and gathering — incident on 2018-03-27

Gas transmission and gathering incident in MAGNET COVE, HOT SPRING County, AR. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4600 NATURAL GAS released, $500 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20180036.

Operator ID: 602.

Reported incident date: 3/27/2018 18:40.

Location detail: BM-28

Cause detail: DEFECTIVE OR LOOSE TUBING OR FITTING

Cause detail: ON MARCH 27TH, 2018 AT 18:43 ENABLE GAS TRANSMISSION SYSTEM CONTROL RECEIVED A CALL FROM THE LAKE CATHERINE POWER PLANT THAT A RELIEF VALVE WAS VENTING. AT 18:45 AN ENABLE O&M TECH WAS DISPATCHED TO THE SCENE. THE O&M TECH REPORTED THAT THE PILOT CONTROLLED RELIEF VALVE BELONGED TO ENABLE (BM-28) AND IT WAS VENTING WHEN HE ARRIVED. BROKEN PILOT STAINLESS STEEL TUBING WAS DETERMINED TO BE THE CAUSE FOR THE VENTING. THE CAUSE OF THE TUBING TO BREAK IS DUE TO VIBRATION. THE O&M TECH REPLACED THE TUBING AND FITTINGS AND THE RELIEF VALVE WAS PLACED BACK IN SERVICE. THE GAS RELEASE IS ESTIMATED TO BE 4.6 MMCF. THE NRC WAS NOTIFIED AT 20:09, (NRC #1207823). A 48 HOUR FOLLOW UP (NRC #1207860) WAS PROVIDED ON MARCH 28TH AT 11:01 CST.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — DEFECTIVE OR LOOSE TUBING/FITTING.

PHMSA indexed costs: $13,528 reported total cost, $12,176.413 in 1984 dollars, $15,540.657 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.