{"operation":"document","citation":"P-76-028","title":"NTSB Safety Recommendation P-76-028","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1976-06-23","effective_on":"1976-06-23","summary":"EXAMINE ITS PROCEDURES AND PRACTICES FOR VALVE AND PIPING CHANGES TO ASSURE THAT EACH CRITICAL ACTION IS CHECKED INDEPENDENTLY BY AT LEAST TWO PERSONS, ONE OF WHOM SHOULD BE A SUPERVISOR. (URGENT)","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-028.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-028.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-76-028","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-76-028","body":"NTSB safety recommendation P-76-028.\n\nEXAMINE ITS PROCEDURES AND PRACTICES FOR VALVE AND PIPING CHANGES TO ASSURE THAT EACH CRITICAL ACTION IS CHECKED INDEPENDENTLY BY AT LEAST TWO PERSONS, ONE OF WHOM SHOULD BE A SUPERVISOR. (URGENT)\n\nPriority: CLASS I\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1976-06-23\n\nAdopted Date: 1976-06-04\n\nOverall Date Closed: 1977-07-29\n\nSynopsis: ON JANUARY 7, 1976, EMPLOYEES AT THE MICHIGAN-WISCONSIN PIPE LINE COMPANY'S CEDARDALE, OKLAHOMA, COMPRESSOR STATION WERE DIRECTED TO OPEN A VALVE ON A SHUT-IN 12-INCH GAS-GATHERING PIPELINE IN AN ATTEMPT TO INCREASE THE FLOW INTO THE MAIN LINE. NATURAL GAS AND NATURAL GAS LIQUIDS AT 700-PSIG PRESSURE ROARED THROUGH THE VALVE, OUT THROUGH THE END OF AN OPEN 12-INCH PIPE, AND INTO A DITCH, WHERE SEVEN MEN WERE WORKING NEAR AN OPEN FLAME HEATER. THE NATURAL GAS LIQUIDS SATURATED THEIR CLOTHING AND THE HEATER SET THEM ON FIRE. FIVE MEN WERE KILLED AND TWO MEN WERE BURNED SERIOUSLY AS A RESULT OF THIS ACCIDENT.\n\nNtsbnumber: DCA76FP012\n\nReport Number: None\n\nAddressee Name: ANR Pipeline (formerly Michigan-Wisconsin Pipeline Company)\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1977-07-29\n\nAddressee Acronym: ANR\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1976-08-10\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: LTR. FROM MICHIGAN WISCONSIN PIPE LINE COMPANY: MICHIGAN WISCONSIN HAS EXAMINED ITS EMERGENCY PROCEDURES AND OPERATION AND MAINTENANCE PROCEDURES FOR THE PIPELINES AND COMPRESSOR STATION AND OUR PROCEDURE FOR ISOLATION OF FACILITIES NOW PROVIDES OPERATING PERSONNEL PERFORMING THE VALVING OR PIPING CHANGES WITH A WRITTEN INSTRUCTION THAT HAS BEEN REVIEWED BY AT LEAST TWO PERSONS AND APPROVED BY THE SUPERVISOR.","truncated":false,"body_characters":1799}