NATURAL GAS PIPELINE CO OF AMERICA (KMI)

Incident Narrative

ON AUGUST 21, 2019 THE NATURAL GAS PIPELINE COMPANY OF AMERICA, LLC (NGPL) 20-INCH INDIAN BASIN PIPELINE EXPERIENCED AN IN-SERVICE FAILURE RESULTING IN A PIPELINE RUPTURE AND LIQUID SPRAY (A MIXTURE OF CONDENSATE AND USED OIL), BUT NO FIRE. AUGUST 21, 2019: 17:41 - RIVERSIDE FIRE DEPARTMENT (NM) DISPATCHED 17:51 - A MEMBER OF THE PUBLIC WORKING IN THE LOCO HILLS NEW MEXICO AREA CONTACTED NGPL GAS CONTROL AND REPORTED AN EVENT IN THE AREA OF THE PIPELINE. 17:55 - RIVERSIDE FIRE DEPARTMENT (NM) ARRIVES ON SCENE. ON ARRIVAL, UNITS STAGED UPWIND AND SECURED ALL ROADS GOING TOWARDS THE PIPELINE. 17:57 TO 18:04 - CALLS MADE TO DEPLOY NGPL PERSONNEL TO THE REPORTED EVENT LOCATION (NGPL TECHNICIAN 3) AND TO CLOSE THE UPSTREAM AND DOWNSTREAM VALVES (NGPL TECHNICIANS 1 AND 2). 18:32 - INTERNAL EMERGENCY RESPONSE LINE (ERL+) CALL NOTIFICATIONS INITIATED PER COMPANY PROCEDURES TO DISCUSS THE INCIDENT. DURING THE CALL, IT WAS COMMUNICATED THAT THE LOCAL FIRE DEPARTMENT ON-SITE HAD CLOSED HILLTOP ROAD AND HIGHWAY 82. 18:51 - CALL TO NRC INITIATED (#1255973) 19:15 - NGPL TECHNICIAN 1 ARRIVES AT MLV IB-3, AUTOMATIC VALVE FOUND FULLY OPEN. 19:16 - NGPL TECHNICIAN 1 CLOSES MLV IB-3 AND IN ROUTE TO MLV IB-4. 19:20 - NGPL TECHNICIAN 2 ARRIVES AT MLV IB-2 AND VERIFIES THAT THE VALVE IS CLOSED AND IN ROUTE TO MLV IB-1. MLV IB-2 TO MLV IB-3 ISOLATED. 19:29 - NGPL TECHNICIAN 3 ARRIVES AT THE GENERAL INCIDENT LOCATION. 19:35 - NGPL TECHNICIAN 3 ON THE FAILURE SITE, VERIFIES FAILURE, REPORTED NO GAS BLOWING. 19:45 - NGPL TECHNICIAN 1 VERIFIES MLV IB-4 CLOSED AND STANDING BY AT SITE. 20:05 - NGPL TECHNICIAN 2 ARRIVES AT MLV IB-1 AND CLOSES THE VALVE. 20:20 - RIVERSIDE FIRE DEPARTMENT (NM) LEAVES THE SCENE. AUGUST 29, 2019: 12:00 - PIPE REPLACED AND COVERED. METALLURGICAL REPORT COMPLETED NOVEMBER 13, 2019. THE RESULTS OF THE METALLURGICAL ANALYSIS INDICATE THAT THE FAILURE OCCURRED AT AN AREA OF WALL THINNING IN THE LONGITUDINAL SEAM WELD DUE TO EXTERNAL CORROSION. THE WALL THINNING LED TO A BRITTLE FRACTURE INDUCED BY THE OPERATING PRESSURE. THE BRITTLE RUPTURE BEHAVIOR OF THE LONGITUDINAL SEAM WAS DUE IN PART TO THE LOW TOUGHNESS AND ALSO THE STRAIN RATE OF THE RUPTURE EVENT. MULTIPLE CORROSION MECHANISMS WERE OBSERVED AT THE RUPTURE INITIATION SITE, INCLUDING LOCALIZED CORROSION IN THE FORM OF SELECTIVE SEAM WELD CORROSION (SSWC), PITTING CORROSION AND GENERAL CORROSION. UPDATE NRC REPORT 1255979 AND 48-HOUR NRC REPORT 1256183. NOTE THAT FORM PHMSA F 7100.2 (REV 09-2019) PART J, Q1 WHEN A POSITIVE RESPONSE IS ENTERED FOR AN INTERNAL INSPECTION TOOL THEN BOTH A MOST RECENT AND A PREVIOUS ENTRY IS REQUIRED. NGPL RAN A GEOMETRY/DEFORMATION TOOL IN 2017 BUT DID NOT HAVE A PRIOR TOOL RUN OF THIS TYPE. IN ORDER TO SUBMIT THIS FORM THE 2017 RUN HAS BEEN ENTERED TWICE IN THAT SECTION.