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ANR PIPELINE CO

gas_transmission Incident —

Incident Information

Report Date—
OperatorANR PIPELINE CO
Commodity—
Pipeline Typegas_transmission

Location

State
Coordinates30.46632, -92.52258

Cause

CauseINCORRECT OPERATION
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage—
Lost Commodity—
Public/Private Damage—
Emergency Response—
Environmental Remediation—
Other Costs—

Location Map

Incident Narrative

ON SEPTEMBER 23, 2021, AN UNINTENTIONAL RELEASE OF APPROXIMATELY 7.9 MILLION CUBIC FEET NATURAL GAS OCCURRED WHEN VALVE 1-25 OPENED AS PART OF COMMISSIONING ACTIVITIES. VALVE 1-25 WAS UNINTENTIONALLY OPENED ALLOWING GAS TO ENTER PIPING THAT WAS INTENDED TO BE ISOLATED. THE SEGMENT WAS ISOLATED DUE TO CONSTRUCTION AND ABANDONMENT WORK OCCURRING ON THE DOWNSTREAM PIPING WHERE A CAP THAT HAD BEEN TACKED IN PLACE WAS DISLODGED AND PROPELLED THROUGH A COMPRESSOR BUILDING WALL. IMMEDIATE ACTIONS AT THE TIME OF THE INCIDENT INCLUDED CLOSING VALVE 1-25 WITHIN 90 SECONDS, STOPPING THE RELEASE OF GAS AND SECURING THE SITE. THE SITE WAS SECURED SUBSEQUENTLY WITH A NEW ISOLATION PLAN IMPLEMENTED PRIOR TO ANY ADDITIONAL WORK CONTINUING AT THE STATION. FOLLOWING THE EVENT, NINE PERSONNEL ON SITE AT THE TIME WERE SENT FOR DRUG AND ALCOHOL TESTING AND OPERATOR QUALIFICATIONS WERE SUSPENDED. IT WAS DETERMINED THAT DURING THE EVENT, VALVE 1-25 WAS ABLE TO BE OPENED BECAUSE IT WAS NOT DISCONNECTED FROM POWER GAS, LOCKED OUT, OR TAGGED OUT IN ACCORDANCE WITH TC ENERGY'S ""LOCKOUT AND TAGOUT PROCEDURE (CAN-US-MEX)"". TC ENERGY DETERMINED THAT ITS LOCKOUT AND TAGOUT (LOTO) PROCEDURES AND THE ISOLATION PLAN DEVELOPED FOR THE PROJECT WERE NOT FOLLOWED. TC ENERGY (OWNER OF ANR PIPELINE COMPANY) HAS COMPLETED A REVIEW OF THE EVENT AT EUNICE COMPRESSOR STATION AND IS CURRENTLY UPDATING PROCEDURES AND PROCESSES. TO PREVENT RECURRENCE OF SIMILAR EVENTS IN THE FUTURE, TC ENERGY IS CREATING A NEW LOCKOUT AND TAGOUT PROCEDURE (US) AND UPDATING THE GAS HANDLING PROCEDURE (US). THESE UPDATES ARE TARGETED TO BECOME EFFECTIVE JULY 1, 2022. IN ADDITION, TC ENERGY HAS CREATED NEW POSITIONS WITHIN THE ORGANIZATION CALLED THE ENERGY ISOLATION & GAS HANDLING TECHNICAL (EIGHT) ADVISOR. THESE ADVISORS WILL BE PLACED THROUGHOUT TC ENERGY'S/ANR PIPELINE COMPANY'S US GAS OPERATIONS AND WILL PROVIDE PROACTIVE SUBJECT MATTER EXPERT SUPPORT ON ENERGY ISOLATION AND GAS HANDLING. TC ENERGY INTENDS TO HAVE THE ADVISOR ROLES FILLED BY END OF YEAR 2022.

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.

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