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|Title:||National Fuel Gas Company, natural gas explosion and fire, Sharpsville, Pennsylvania, February 22, 1985.|
|All Authors / Contributors:||National Transportation Safety Board. Bureau of Accident Investigation.|
|Notes:||Misc. No.: NTSB/PAR-85/02.
Accession No.: 70743.
|Year:||October 25, 1985.|
|Publisher:||Washington, DC : The Board,|
|Class Descriptors:||LC Class No.: TN880.5 .U58 85/02|
|Corporate Author:||National Transportation Safety Board. Bureau of Accident Investigation.|
|Series:||Pipeline accident report; Variation: Pipeline accident report.|
The National Transportation Safety Board determines that the probable cause of the accident was the gas company's failure to understand the limitations of the restraining-type coupling in holding plastic pipe during thermal contraction, which led to the pullout allowed natural gas under 50-psig pressure to escape, to migrate through the soil, to accumulate in two nearby buildings, and to ignite from an undetermined source. Contributing to the accident was the gas company dispatcher's slowness, due to lack of training and guidelines, in perceiving the severity of the gas leak and in requesting the local police, already on site, to evacuate and to ventilate nearby buildings.