MARKWEST JAVELINA PIPELINE COMPANY, LLC — Gas transmission and gathering — incident on 2015-04-28

Gas transmission and gathering incident in CORPUS CHRISTI, NUECES County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 833 HYDROGEN GAS released, $1,450,000 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: 20150071.

Operator ID: 9171.

Reported incident date: 4/28/2015 13:41.

Location detail: CITGO WEST

Cause detail: NON-THREADED CONNECTION FAILURE

Cause detail: AN IN-LINE INSPECTION OF THE HYDROGEN PIPELINE WAS BEING CONDUCTED AND PRIOR TO THE LAST RUN OF THE IN-LINE INSPECTION TOOL (MFL), HYDROGEN GAS WAS RELEASED AND IGNITED FROM A BLIND FLANGE CONNECTION FAILURE ON A TEMPORARY SEPARATOR FILTER INSTALLED AT THE RECEIVER SITE. THE FIRE WAS IMMEDIATELY IDENTIFIED BY ON-SITE PERSONNEL. THERE WERE NO INJURIES SUSTAINED AS A RESULT OF THE INCIDENT. THE PIPELINE SECTION WAS ISOLATED AND DE-PRESSURED TO THE FACILITY FLARE. LOCAL EMERGENCY RESPONDERS WERE DISPATCHED AND CONTAINED/EXTINGUISHED THE FIRE. THE FIRE AFFECTED THE STATION PIPING AND EQUIPMENT IN THE SURROUNDING AREA. REPAIRS AND/OR REPLACEMENT OF AFFECTED PIPING AND EQUIPMENT WERE COMPLETED AND RE-COMMISSIONED.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — NON-THREADED CONNECTION FAILURE.

PHMSA indexed costs: $1,451,027 reported total cost, $728,369.162 in 1984 dollars, $1,792,573.18 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.