PANHANDLE EASTERN PIPELINE CO

Incident Narrative

ON OCTOBER 13, 2014 AT APPROXIMATELY 10:09 AM CST, THE PANHANDLE EASTERN PIPE LINE COMPANY 22-INCH LOUISBURG 100 LINE EXPERIENCED AN IN-SERVICE RELEASE WHICH SUBSEQUENTLY IGNITED IN JOHNSON COUNTY, MO JUST WEST OF THE RURAL COMMUNITY OF CENTERVIEW. THERE WERE NO INJURIES; HOWEVER, THERE WAS ONE SELF-EVACUATION OF A RESIDENT CLOSEST TO THE SITE AS A PRECAUTIONARY MEASURE. THE RELEASE OCCURRED IN A RURAL AREA AND WITHIN A PASTURE. THE CLOSEST STRUCTURE INTENDED FOR HUMAN OCCUPANCY IS ABOUT 500 FEET NORTHWEST (LANDOWNER RESIDENCE). THIS STRUCTURE WAS UNDAMAGED; HOWEVER A BARN LOCATED APPROXIMATELY 221 FEET TO THE NORTHWEST HAD MINOR DAMAGE FROM FLYING DEBRIS. THE RELEASE APPEARED TO HAVE INITIATED BY PIPE MOVEMENT OUT OF THE MECHANICAL DRESSER COUPLINGS. THE PIPE SEGMENT INVOLVED DOES NOT CONTAIN AN HCA. THE PRESSURE AT THE TIME OF THE RELEASE WAS 441 PSIG AT THE LOUISBURG 105 GATE; THE MAOP OF THIS SEGMENT IS 475 PSIG. GAS CONTROL ALARMS ACCOMPANIED BY A COINCIDENT CALL FROM JOHNSON COUNTY 911 SET IN MOTION A RESPONSE BY LOCAL EMPLOYEES WHICH HAD THE AFFECTED SEGMENT ISOLATED ON THE UPSTREAM (105 GATE) AND DOWNSTREAM (106 GATE) SIDES BY APPROXIMATELY 11:25 AM. LOCAL LAW ENFORCEMENT AND FIRE FIGHTERS RESPONDED TO THE EVENT AND PERFORMED ADMIRABLY AS THEY SECURED THE INCIDENT SITE AND WORKED COOPERATIVELY WITH LOCAL PEPL EMPLOYEES. THIS SUPPLEMENTAL REPORT UPDATES THE PART G APPARENT CAUSE BASED ON THE ROOT CAUSE ANALYSIS. THE DIRECT CAUSE OF THIS INCIDENT SHOULD BE CATEGORIZED AS A CONSTRUCTION FAILURE. THE PIPE WAS CONSTRUCTED IN 1931 WITH AN OVER BEND AT THE COUPLING THAT EXCEEDED THE COUPLING MANUFACTURER DEFLECTION RECOMMENDATIONS. THE PIPE DISENGAGED AT THE COUPLING DUE TO THAT DEFLECTION EXCEEDANCE COMBINED WITH AN UPWARD COMPONENT FORCE DUE TO INTERNAL PRESSURE. ALSO A CONTRIBUTING FACTOR WAS INADEQUATE RESISTIVE FORCES ON THE PIPE AS A RESULT OF CHANGES IN SOIL PROPERTIES DUE TO WATER SATURATION. ADDITIONAL UPDATES WERE MADE TO PART C, 3; PART D - COSTS 7B, AND 7D; PART E 2A; AND PART G - CAUSE. THE SUPPLEMENTAL/FINAL REPORT DATED 10/20/16, UPDATES WERE MADE TO THE FOLLOWING SECTIONS: PART A - (4) AND (7); PART B (11) - DEPTH-OF-COVER; PART C - (3)H COATING TYPE. THE SUPPLEMENTAL/FINAL REPORT DATED 10/27/16, UPDATES WERE MADE TO THE FOLLOWING SECTIONS: PART A - (4) AND PART C - (3)H COATING TYPE.