TENNESSEE GAS PIPELINE COMPANY — Gas transmission and gathering — incident on 2016-05-21

Current as of 2016-05-21 Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

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Gas transmission and gathering incident in Not Within a Municipality, WAYNE County, TN. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 32147 NATURAL GAS released, $0 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: 20160050.

Operator ID: 19160.

Reported incident date: 5/21/2016 15:52.

Location detail: STATION 555

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: ON MAY 21, 2016, AN UNINTENTIONAL RELEASE OF NATURAL GAS OCCURRED AT THE TGP COLLINWOOD COMPRESSOR STATION 555 IN WAYNE COUNTY, TENNESSEE WHEN THE STATION EXPERIENCED AN EMERGENCY SHUT-DOWN (ESD) DUE TO A FAILED GAS DETECTOR AND SUBSEQUENT FAILURE OF AN ESD ISOLATION VALVE TO PROPERLY CLOSE. THIS RESULTED IN A RELEASE OF 32,147 MCF OF NATURAL GAS. STATION EMPLOYEES RESPONDED AND SHUT IN THE AFFECTED VALVE. A FAILED GAS DETECTOR WAS IDENTIFIED AS THE CAUSE OF THE ESD. THE REPORTABLE RELEASE OF NATURAL GAS RESULTED WHEN THE ESD ISOLATION VALVE FAILED TO CLOSE. FAILURE OF THE ESD ISOLATION VALVE TO PROPERLY CLOSE RESULTED FROM THE IMPROPER INSTALLATION OF THE UNIT POWER GAS LINES. PRIOR TO RETURNING THE STATION BACK TO SERVICE, THE POWER GAS LINES WERE PROPERLY RE-INSTALLED AND THE GAS DETECTOR COMPONENTS WERE REPLACED (CONTROLLER AND SENSORS). THE VALVE AND GAS DETECTOR WERE TESTED AND THE STATION WAS RETURNED TO SERVICE AT 1:03 AM CST THE FOLLOWING DAY.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $56,435 reported total cost, $59,320.134 in 1984 dollars, $73,665.54 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.

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.