{"operation":"document","citation":"P-78-023","title":"NTSB Safety Recommendation P-78-023","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1978-07-06","effective_on":"1978-07-06","summary":"DEVELOP AND ISSUE GUIDELINES TO PIPELINE OPERATORS CONCERNING THE NUMBER AND LOCATION OF EMERGENCY VALVES IN HIGH-PRESSURE GAS DISTRIBUTION SYSTEMS.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-023.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-023.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-78-023","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-78-023","body":"NTSB safety recommendation P-78-023.\n\nDEVELOP AND ISSUE GUIDELINES TO PIPELINE OPERATORS CONCERNING THE NUMBER AND LOCATION OF EMERGENCY VALVES IN HIGH-PRESSURE GAS DISTRIBUTION SYSTEMS.\n\nPriority: CLASS II\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1978-07-06\n\nAdopted Date: 1978-05-18\n\nOverall Date Closed: 1985-07-29\n\nSynopsis: ON DECEMBER 1, 1977, A 12-INCH, CAST-IRON HIGH-PRESSURE GAS MAIN OWNED BY THE ATLANTA GAS LIGHT COMPANY WAS RUPTURED BY AN 8-INCH STEEL I-BEAM PILE, WHICH WAS DRIVEN THROUGH THE PIPE AT A CONSTRUCTION SITE IN DOWNTOWN ATLANTA, GEORGIA. WITHIN MINUTES, NATURAL GAS AT 10-PSIG PRESSURE MIGRATED THROUGH THE GROUND, ENTERED SEWER LINES AND ELECTRIC CONDUIT SYSTEMS, AND SPREAD INTO NEARBY BUILDINGS. THE GAS DID NOT IGNITE, BUT THOUSANDS OF PEOPLE WERE EVACUATED FROM NEARBY OFFICE BUILDINGS.\n\nNtsbnumber: DCA78MP003\n\nReport Number: PAR-78-03\n\nAddressee Name: American Society of Mechanical Engineers\n\nAddressee Status: Closed - Acceptable Action\n\nAddressee Date Closed: 1985-07-29\n\nAddressee Acronym: ASME\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1978-09-06\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: ASME LTR: ASME-GPSC IS REVIEWING THIS RECOMMENDATION.\n\nAddressee Acronym: ASME\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1985-09-12\n\nCommunication Type: Official Correspondence\n\nAddressee Acronym: ASME\n\nAddressee Organization Type: A-Associations\n\nCommunication Date: 1985-07-29\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":1544}