LEAKAGE MEASUREMENT INTO A GAS-CHARGED CONTAINER

摘要

Apparatus and method for measuring a rate of leakage from a closed vessel enclosed in a container. Air is expelled from the container and a charge of helium-free gas is introduced. The preferred container is comprised of flexible sheets with mating edges sealed together. The flexible container is collapsed when air is expelled, and then limply charged with a known volume of heliumfree gas. The vessel is pressurized with helium, the rate of accumulation of which is measured in the container gas to determine the leakage from the vessel.