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TRANSCONTINENTAL GAS PIPE LINE COMPANY

gas_transmission Incident —

Incident Information

Report Date—
OperatorTRANSCONTINENTAL GAS PIPE LINE COMPANY
Commodity—
Pipeline Typegas_transmission

Location

State
Coordinates29.74247, -92.35308

Cause

CauseCORROSION FAILURE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

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

Location Map

Incident Narrative

APRIL 28TH A LEAK WAS DISCOVERED BY A TECHNICIAN WHILE PERFORMING OTHER MAINTENANCE ON SITE. END OF APRIL/EARLY MAY WILLIAMS BEGAN ASSESSING POTENTIAL OPTIONS TO STOP THE LEAK. AFTER IT WAS DETERMINED THAT A BLOWDOWN WAS TOO RISKY DUE TO LIQUIDS KNOWN TO BE IN THE PIPELINE, ALTERNATIVE METHODS WERE REVIEWED AND A CLAMP WAS SELECTED AS THE BEST OPTION. MID-LATE MAY MULTIPLE VENDORS WERE CONTACTED ABOUT THE CLAMP, AND SITE VISITS WERE CONDUCTED TO TAKE MEASUREMENTS BECAUSE OF THE FACT THAT IT WOULD HAVE TO BE A CUSTOM MADE/ENGINEERED CLAMP TO STOP THE LEAK. EARLY JUNE VENDOR SUPPLIED US WITH A QUOTE FOR THE CLAMP, BUT REQUESTED A SECOND SITE VISIT DUE TO CONCERNS OVER THE INITIAL MEASUREMENTS. ADDITIONAL MEASUREMENTS WERE TAKEN AND AN UPDATED DESIGN WAS SUBMITTED ON JUNE 11TH. PO ISSUED TO VENDOR TO BEGIN MANUFACTURING. EXPEDITED OPTION WAS SELECTED AND THE LEAD TIME WAS 8 WEEKS, WHICH LEADS TO AN EARLY AUGUST DELIVERY JULY 28TH VENDOR UPDATES WILLIAMS AND INFORMS THEM THAT THE CLAMP DELIVERY IS ON TRACK AUGUST 2ND VENDOR INFORMS WILLIAMS THAT THE HEAT TREATMENT FACILITY WAS EXPERIENCING DELAYS THAT WERE BEING WORSENED BY COVID IMPACTS, AND THAT THERE WAS NOW A 2-3 WEEK DELAY IN THE DELIVERY DATE. AUGUST 18TH THE CLAMP SHIPS FROM THE MANUFACTURER TO WILLIAMS CONTRACTOR WHO WILL BE INSTALLING IT IN THE FIELD AUGUST 23RD CLAMP ARRIVES AT CHET MORRISONS FACILITY IN HOUMA, LA END OF AUGUST CLAMP WAS TO BE INSTALLED BY THE END OF AUGUST, BUT HAD TO BE DELAYED DUE TO HURRICANE IDA EARLY SEPTEMBER CONTRACTORS SHOP WAS DIRECTLY IMPACTED BY HURRICANE IDA AND IT TOOK A FEW DAYS BEFORE WE COULD GET A HOLD OF THE CONTRACTOR AND DETERMINE IF THE CLAMP WAS STILL SECURED. MID-SEPTEMBER DUE TO HURRICANE IDA MANY BOATS IN THE SOUTH LOUISIANA AREA ARE HARD TO SECURE BECAUSE OF HIGH DEMAND. OUR CONTRACTOR IS FINALLY ABLE TO SECURE A BOAT AND A NEW MOBILIZATION DATE OF 9/12 IS COORDINATED. BOAT ARRIVED ON SITE AT THE SHORE SCRUBBERS ON 9/14, BUT IS ON STANDBY UNTIL WEATHER PASSES AND ALLOWS FOR INSTALLATION. 9/19 CLAMP INSTALLED, LEAK STOPPED.

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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