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Base de datos CISDOC

ID (ISN) del documento46202
Número CIS 86-909
ISSN - Título de la serie 0016-5581 - Gazovaja Promyšlennost
Año 1985
Número de serie
Autor(es) Sultanovič A.I., Hačukaev Ė.M., Polomošnov A.K.
Título Electrostatic factors in working with open flames on gas pipelines
Título original Ėlektrostatičeskie faktory pri ognevyh rabotah na gazoprovodah [en ruso]
Información bibliográfica Mar. 1985, No.3, p.32-33. Illus.
Resumen Gas pipelines are blocked off by spherical rubber plugs when cutting or welding operations are to be performed. When the plugs are withdrawn at the end of the operation, detonation frequently occurs when gas mixes with the residual air in the pipe. Laboratory experiments with a section of typical piping showed that electrostatic fields of 1kV can be produced by withdrawal of a plug. At the observed surface charge density of 0.0006C/cm2, this is sufficient to produce a discharge with an energy above the minimum ignition energy of a gas-air mixture. Electrostatic charging could be reduced to safe levels by reducing the diameter of the tube through which the plug is retrieved and by wetting the space around the plug. Because thunderstorms can strongly ionise the atmosphere and produce substantial electrostatic charges even at high relative humidity, cutting and welding work on pipelines should be avoided in stormy weather.
Descriptores (primarios) electricidad estática; tuberías; conservación y reparación; distribución del gas; eliminación de la electricidad estática; prevención de las explosiones; soldadura y corte con soplete
Descriptores (secundarios) métodos de trabajo y seguridad
Tipo de documento D - Artículos periódicos
Tema(s) Incendios, explosiones
Broad subject area(s)
Navegación por categoria(s) Compressed gases and pressure vessels
Power generation and distribution
Welding and cutting