Method for combined gas fill and proof test of pressure vessels

摘要

A method of filling and proof testing pressure vessels, such as hybrid air bag inflators, with gas. A method of filling a pressure vessel where the volume and temperature of the gas going into the vessel are controlled to ensure a consistent fill mass. By setting the controlled temperature high enough to cause this fill pressure to exceed the required proof pressure, the vessel can be sealed immediately after filling and the pressure will decrease as the contents cool. If a required hold time is specified in connection with the proof test, the temperature can be set high enough to allow for cooling of the contents during the hold time. The need for a separate proof test step is eliminated and cycle time is greatly reduced.