purging

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purging

[′pərj·iŋ]
(engineering)
Replacing the atmosphere in a container by an inert substance to prevent formation of explosive mixtures.
(medicine)
The condition in which there is rapid and continuous evacuation of the bowels.
(science and technology)
The act or process of cleaning and purifying.

purging

1. The process of voiding a pipe of fuel gas and replacing it with air.
2. The process of replacing the air in a gas pipeline with fuel gas.