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Safety Recommendation Details

Safety Recommendation P-78-045
Details
Synopsis: 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.
Recommendation: INSTALL PRESSURE GAUGES TO POSITIVELY IDENTIFY ALL GAS MAINS TO BE TAPPED WHENEVER THERE ARE TWO OR MORE MAINS IN THE SAME EXCAVATION THAT CANNOT BE POSITIVELY VERIFIED BY LOCATION, SIZE, KIND, OR TYPE OF COATING, ETC. (URGENT)
Original recommendation transmittal letter: PDF
Overall Status: Closed - Acceptable Action
Mode: Pipeline
Location: Mansfield, OH, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA78FP019
Accident Reports:
Report #: None
Accident Date: 5/17/1978
Issue Date: 8/21/1978
Date Closed: 2/23/1988
Addressee(s) and Addressee Status: NiSource, Inc. (formerly Columbia Gas) (Closed - Acceptable Action)
Keyword(s):

Safety Recommendation History
From: NiSource, Inc. (formerly Columbia Gas)
To: NTSB
Date: 2/23/1988
Response:

From: NTSB
To: NiSource, Inc. (formerly Columbia Gas)
Date: 2/23/1988
Response:

From: NTSB
To: NiSource, Inc. (formerly Columbia Gas)
Date: 12/14/1978
Response:

From: NiSource, Inc. (formerly Columbia Gas)
To: NTSB
Date: 9/25/1978
Response: COLUMBIA GAS OF OHIO LTR: COLUMBIA GAS AGREES WITH THE RECOMMENDATION. ACTION HAS BEEN TAKEN TO SEE THAT A PRESSURE GAUGE IS UTILIZED WHENEVER THERE ARE TWO OR MORE MAINS IN THE SAME LOCATION THAT CANNOT BE POSITIVELY IDENTIFIED.