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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 170122048 - Employee Killed During Natural Gas Explosion

Accident: 170122048 -- Report ID: 0454734 -- Event Date: 05/08/1991
InspectionOpen DateSICEstablishment Name
11106595905/09/19919311Knoxville Utility-Job Site
A gas-leak repair crew of the Knoxville Utilities Board's gas division was installing a pipe drop in a 6 inch natural gas pipeline. The drop had to be installed because a contractor that was laying a large 18 inch concrete tile drain in the gas line ruptured the cast-iron pipeline. The drop consisted of a 6 inch plastic pipe with 90 degree elbows that allowed the new line to go under the tile drain. The newly installed plastic pipe was attached to a stub of cast-iron pipe that went into an old undisturbed cast-iron fitting. Stresses on the plastic pipe caused the old stub to pull out (separate), allowing the full flow of a 6 inch pressurized gas line to flow over the workers. The gas line was ignited by a propane torch in the work area. An explosion and fire ensued, killing Employee #1.
Keywords: installing, fire, natural gas, propane torch, explosion, pipeline
Employee # Inspection Age Sex Degree Nature Occupation
1 111065959 Fatality Burn/Scald(Heat) Structural metal workers

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