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Safety Recommendation Details

Safety Recommendation P-78-053
Details
Synopsis: ON MARCH 29, 1978, THE OKLAHOMA NATURAL GAS COMPANY (ONG) DISPATCHED A CREW TO SHUT OFF GAS SERVICE TO A SHOPPING CENTER IN OKLAHOMA CITY. THE CREW WAS UNABLE TO CLOSE A VALVE, SO THEY DISCONNECTED THE LINE ON THE LOW-PRESSURE SIDE OF THE REGULATOR AT A 2-INCH UNION AND PLUGGED THE LINE WITHOUT FIRST STOPPING THE FLOW OF GAS. ON APRIL 24, 1978, ONG ASSIGNED A DIFFERENT CREW TO RESTORE GAS SERVICE TO THE SHOPPING CENTER. TWO EMPLOYEES WERE OVERCOME BY GAS WHILE ATTEMPTING TO RECONNECT THE 2-INCH UNION WITHOUT FIRST STOPPING THE FLOW OF GAS INSIDE THE VAULT. THREE OTHER ONG EMPLOYEES ENTERED THE VAULT THROUGH THE 19-INCH OPENING TO RESCUE THE MEN AND WERE ALSO OVERCOME; THE CREW DID NOT HAVE A RESPIRATOR AT THE JOB SITE. ONE MAN WAS PULLED OUT OF THE VAULT BY OTHER ONG WORKERS AND WAS REVIVED AT THE SCENE; HOWEVER, THE OTHER FOUR MEN DIED OF ASPHYXIATION.
Recommendation: REQUIRE ITS EMPLOYEES TO USE VALVES OR OTHER MEANS TO STOP THE FLOW OF GAS BEFORE DISCONNECTING OR RECONNECTING ACTIVE GAS LINES. (URGENT)
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Pipeline
Location: Oklahoma City, OK, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: FTW78FP008
Accident Reports:
Report #: None
Accident Date: 4/24/1978
Issue Date: 8/28/1978
Date Closed: 12/19/1978
Addressee(s) and Addressee Status: Oklahoma Natural Gas Corporation (Closed--No Longer Applicable)
Keyword(s):

Safety Recommendation History
From: NTSB
To: Oklahoma Natural Gas Corporation
Date: 12/19/1978
Response:

From: Oklahoma Natural Gas Corporation
To: NTSB
Date: 9/6/1978
Response: OKLAHOMA NATURAL GAS COMPANY LTR: OUR MODIFIED POLICY REQUIRES OUR EMPLOYEES TO USE A VALVE OR OTHER MEANS TO STOP THE FLOW OF GAS BEFORE DISCONNECTING OR RECONNECTING ACTIVE GAS LINES IN CONFINED SPACES.