Sweep-through purging

Purging process adds purge gas into a vessel at one opening and withdraws the mixed gas from the vessel to the atmosphere (or scrubber) from another opening. This process is generally used when the vessel or equipment is not rated for pressure or vacuum.
Reference: Chemical Process Safety – Fundamentals with Applications, 2nd Ed., Daniel A. Crowl/Joseph F. Louvar
Science/Flammability/Prevention Design/Inerting