ONEOK GAS TRANSPORTATION, LLC — Gas transmission and gathering — incident on 2014-01-06

Gas transmission and gathering incident in DEPEW, CREEK County, OK. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 39400 NATURAL GAS released, $180,000 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: 20140015.

Operator ID: 31286.

Reported incident date: 1/6/2014 10:57.

Cause detail: EXTERNAL CORROSION

Cause detail: THE ONEOK GAS TRANSPORTATION (OGT) LINE A-26 PIPELINE FAILED AND ESCAPING GAS IGNITED APPROXIMATELY 1.5 MILES SOUTH OF MILFAY, OK AT 1057 HOURS ON JANUARY 6, 2014. OGT FIELD OPERATIONS PERSONNEL WORKING AT THE ONEOK GAS STORAGE DEPEW STORAGE FACILITY WERE THE FIRST TO RECOGNIZE THE EVENT AND NOTIFIED GAS CONTROL WITHIN FIVE MINUTES. GAS CONTROL CONFIRMED THIS ALSO WITH THE DATA COMING IN ON THEIR SCADA SCREENS. OGT PERSONNEL WERE DISPATCHED TO THE SITE ARRIVING AT 1120 HOURS. LOCAL LAW ENFORCEMENT AND FIRE DEPARTMENT ALSO RESPONDED. THERE WERE NO FATALITIES OR INJURIES. THE 10.7 MILE PIPE SEGMENT WAS ISOLATED AT 1155 HOURS. NATURAL GAS SERVICE WAS DISRUPTED TO 48 UTILITY CUSTOMERS IN MILFAY AND 13 RURAL FARM TAP CUSTOMERS WERE ALSO IMPACTED. A NEW SECTION OF PIPE WAS INSTALLED AND THE PIPELINE RETURNED TO SERVICE ON JANUARY 9, 2014. UPDATE: THIRD PARTY FAILURE ANALYSIS DETERMINED THE FAILURE WAS CAUSED BY GENERAL AND INTERGRANULAR EXTERNAL CORROSION THAT OCCURRED UNDER COLD APPLIED TAPE COATING. THIS CAUSED A REDUCTION IN THE PIPELINE WALL THICKNESS TO THE POINT THE MATERIAL WAS NO LONGER CAPABLE OF CONTAINING THE GAS PRESSURE AND FAILURE OCCURRED.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — EXTERNAL.

PHMSA indexed costs: $418,165 reported total cost, $242,632.781 in 1984 dollars, $456,441.515 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.