Test gas supply for tightness test of hollow bodies - uses flushing gas to create distribution flow in tested cavity and test gas supply into distribution flow

A container (1) has a bung hole (2) with a screw-in lid. A lance-shaped component (L) projects into the container and consists of two tubes (3, 4) with a series of jets (5, 6) as outlets for flushing and test gases. The tubes are bound together by straps (7, 8) control valves (11, 12) are mounted in the inlet pipes (9, 10). After insertion of the lance-shaped component (L) into the container a dispersing flow of flushing gas is introduced through the respective jest (5). Into this flow a test gas is introduced through the second series of jets (6). The supply tubes are then removed and the bung hole sealed. The vessel is then transferred to a testing container. Helium or chlorinated hydrocarbons may be used for the test gas and air, nitrogen or carbon dioxide for the flushing gas.