PHILLIPS 66 PIPELINE LLC

Incident Narrative

ON WEDNESDAY, MAY 29, 2019 AT APPROXIMATELY 8:45 AM DURING A ROUTINE ANAMOLY DIG, THE CREW WAS REMOVING COATING AND WRAP AND HEARD A HISSING NOISE COMING FROM A PIN HOLE LEAK NEAR A STOPPLE FITTING ON THE PR-01 PIPELINE. THE CREW EXITED THE DITCH AND MADE NOTIFICATIONS. THE LINE WAS IMMEDIATELY SHUT DOWN AND ISOLATED AND THE LEAK AREA WAS MONITORED. TO REPAIR THE LEAK, THE PIPELINE WAS PURGED WITH NITROGEN PURGE AND THE SECTION OF THE PIPELINE WITH THE LEAK WAS REPLACED. THE PIPELINE RESTARTED AT APPROXIMATELY 6 PM ON SUNDAY, JUNE 2, 2019. THE TOTAL LEAK VOLUME WAS ESTIMATED AT 0.98 BARRELS. THE SECTION OF PIPE THAT WAS REMOVED HAS BEEN SENT TO A LAB FOR METALLURGICAL ANALYSIS TO DETERMINE THE CAUSE OF THE PINHOLE. THIS REPORT WILL BE FINALIZED FOLLOWING OBTAINING THE RESULTS OF THE ANALYSIS. 02/26/2020 UPDATE RECEIVED PRELIMINARY METALLURGICAL ANALYSIS SHOWS THAT THE FAILURE APPEARS TO HAVE BEEN CAUSED BY SOIL SIDE SELECTIVE SEAM CORROSION. A MECHANICAL TEST IS IN PROGRESS TO VERIFY THE RESULTS. 3/30/2020 UPDATE. UPDATED DEPTH OF COVER DUE TO DISCREPANCY IN API REPORTS--TF 6/3/2020 FINAL ANALYSIS. FINAL ANALYSIS CONCLUDED THAT THE PIPE LEAKED DUE TO SELECTIVE ERW SEAM WELD CORROSION. THE CORROSION WAS ENTIRELY EXTERNAL AND HIGHLY LOCALIZED IN A SMALL ZONE OF APPARENT COATING FAILURE AT THE 6:00 O'CLOCK POSITION. THE ERW SEAM WELD WAS OF GOOD QUALITY WITH NO HOOK CRACKS OR EXCESSIVE INTERNAL FLASH. INTERNAL CORROSION WAS MINIMAL AND THE PIPE MET THE CHEMISTRY AND MECHANICAL PROPERTIES REQUIREMENTS FOR API 5L GR. X-42. 9-10-2020 UPDATE REQUEST FROM AID UPDATED THE UNKNOWN FREQUENCY, YEAR AND MANUFACTURE OF PIPE. CORRECTED G-5 TO A YES BECAUSE THERE WAS DAMAGED COATING. --TF 9-15-2020 UPDATE DUE TO ERROR IN PIPE MANUFACTURE REPORTING--TF