{"operation":"document","citation":"P-78-048","title":"NTSB Safety Recommendation P-78-048","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1978-08-21","effective_on":"1978-08-21","summary":"REVIEW WITH ITS CONSTRUCTION CREWS AND OTHERS ENGAGED IN TAPPING OPERATIONS THE IMPORTANCE OF IDENTIFYING POSITIVELY THE TYPE OF GAS MAIN INVOLVED BEFORE TAPPING IT. (URGENT)","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-048.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-048.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-048","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-78-048","body":"NTSB safety recommendation P-78-048.\n\nREVIEW WITH ITS CONSTRUCTION CREWS AND OTHERS ENGAGED IN TAPPING OPERATIONS THE IMPORTANCE OF IDENTIFYING POSITIVELY THE TYPE OF GAS MAIN INVOLVED BEFORE TAPPING IT. (URGENT)\n\nPriority: CLASS I\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1978-08-21\n\nAdopted Date: 1978-08-08\n\nOverall Date Closed: 1988-02-23\n\nSynopsis: ON MAY 17, 1978, A COLUMBIA GAS OF OHIO, INC., CONSTRUCTION CREW, MISTAKING AN 8-INCH, LOW-PRESSURE STEEL GAS MAIN FOR AN 8-INCH, HIGH-PRESSURE STEEL GAS MAIN, DRILLED A SMALL PILOT BIT HOLE THROUGH THE WALL OF THE LOW-PRESSURE GAS MAIN AND BEGAN TO CUT INTO THE PIPE WALL WITH A LARGE DIAMETER BIT. GAS FROM THE HIGH PRESSURE GAS SYSTEM ENTERED THE 14-INCH WATER COLUMN LOW-PRESSURE GAS MAIN AND RAPIDLY INCREASED THE PRESSURE IN THE LOW-PRESSURE SYSTEM IN A 4.8-SQUARE-MILE AREA OF MANSFIELD. THE MANSFIELD FIRE DEPARTMENT BEGAN RECEIVING REPORTS OF FIRES CAUSED BY EXCESSIVELY HIGH APPLIANCE FLAMES ON GAS APPLIANCES. THERE WERE NO FATALITIES OR INJURIES REQUIRING HOSPITALIZATION. PROPERTY DAMAGE TO 16 HOUSES RESULTED FROM THE IGNITION OF NEARBY COMBUSTIBLES BY HIGH PILOT FLAMES; 5 OF THESE HOUSES WERE EXTENSIVELY DAMAGED.\n\nNtsbnumber: DCA78FP019\n\nReport Number: None\n\nAddressee Name: NiSource, Inc. (formerly Columbia Gas)\n\nAddressee Status: Closed - Acceptable Action\n\nAddressee Date Closed: 1988-02-23\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1978-09-25\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: COLUMBIA GAS OF OHIO LTR: COLUMBIA AGREES WITH THE RECOMMENDATION. THIS INCIDENT HAS BEEN REVIEWED WITH SUPERVISIONS WITH RENEWED EMPHASIS ON POSITIVE IDENTIFICATION. CONSTRUCTION CREWS HAVE BEEN RECEIVING THE SAME INFORMATION.\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1988-02-23\n\nCommunication Type: Official Correspondence\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1978-12-14\n\nCommunication Type: Official Correspondence\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1988-02-23\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":2139}