{"operation":"document","citation":"P-77-028","title":"NTSB Safety Recommendation P-77-028","source_type":"guidance","agency":"National Transportation Safety Board","status":"guidance","official":true,"published_on":"1977-10-31","effective_on":"1977-10-31","summary":"INSPECT EMERGENCY SHUTDOWN VALVES AND THEIR COMPONENTS AT COMPRESSOR STATIONS AT MORE FREQUENT INTERVALS THAN 1 YEAR (MONTHLY OR QUARTERLY) UNTIL EQUIPMENT OF PROVEN RELIABILITY HAS BEEN INSTALLED, TESTED, AND SHOWN TO BE RESPONSIVE FOR LONGER PERIODS OF INACTIVITY.","machine_formats":{"json":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-028.json","markdown":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-028.md"},"app_url":"https://regulus.evalyn.ai/document/ntsb-recommendation-p-77-028","source_url":"https://data.ntsb.gov/carol-main-public/sr-details/P-77-028","body":"NTSB safety recommendation P-77-028.\n\nINSPECT EMERGENCY SHUTDOWN VALVES AND THEIR COMPONENTS AT COMPRESSOR STATIONS AT MORE FREQUENT INTERVALS THAN 1 YEAR (MONTHLY OR QUARTERLY) UNTIL EQUIPMENT OF PROVEN RELIABILITY HAS BEEN INSTALLED, TESTED, AND SHOWN TO BE RESPONSIVE FOR LONGER PERIODS OF INACTIVITY.\n\nPriority: CLASS II\n\nOverall Status: Closed - Acceptable Action\n\nIssued Date: 1977-10-31\n\nAdopted Date: 1977-10-13\n\nOverall Date Closed: 1978-11-21\n\nSynopsis: ON DECEMBER 7, 1976, A NATURAL GAS COMPRESSOR FAILED AND THEN EXPLODED AND BURNED AT AN EXXON GAS SYSTEM, INC., STATION NEAR ROBSTOWN, TEXAS. AN EMERGENCY SHUTDOWN SYSTEM WAS ACTIVATED, BUT FOUR AUTOMATED FIRE GATE VALVES DID NOT CLOSE. ANOTHER EMERGENCY CONTROL SYSTEM ALSO FAILED TO AUTOMATICALLY CLOSE THE SHUTOFF VALVES, LEADING TO TWO OF THE FIVE COMPRESSORS IN THE STATION. A SECOND EXPLOSION OCCURRED WITHIN THE BURNING BUILDING. THE FIRE KILLED ONE PERSON, INJURED TWO PERSONS, AND DESTROYED THREE ENGINE-DRIVEN COMPRESSORS AND THE COMPRESSOR BUILDING.\n\nNtsbnumber: DCA77MP005\n\nReport Number: PAR-77-03\n\nAddressee Name: ExxonMobil Corporation\n\nAddressee Status: Closed--No Longer Applicable\n\nAddressee Date Closed: 1978-11-21\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1977-12-20\n\nCommunication Type: Official Correspondence\n\nCommunication Contents: LTR FROM EXXON GAS SYSTEM: EXXON HAS SET UP A MONTHLY VISUAL INSPECTION WITH PHYSICAL OPERATION OF EACH EMERGENCY SHUTDOWN SYSTEM. THEY ARE CHECKED FOR RESPONSE TO \"FIRE\", \"MANUAL\", \"HIGH SCRUBBER LIQUID LEVEL\", \"VALVE OUT OF POSITION\", AND WHERE APPLICABLE, \"GAS DETECTED\" SIGNALS. MONTHLY TESTS WILL CONTINUE UNTIL THE RELIABILITY OF ALL COMPONENTS IN THE ESD SYSTEM HAVE BEEN PROVEN FOR LONGER PERIODS OF INACTIVITY.\n\nAddressee Organization Type: P-Private Industry\n\nCommunication Date: 1979-01-05\n\nCommunication Type: Official Correspondence","truncated":false,"body_characters":1894}