Method for combined gas fill and proof test of pressure vessels

Fluent material handling – with receiver or receiver coacting mea – With testing or weighing receiver content

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141 3, 141 20, 141 95, 141 99, 73 494, 53403, B65B 130, B65B 326

Patent

active

055884725

ABSTRACT:
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.

REFERENCES:
patent: 4002054 (1977-01-01), Grenci
patent: 4090394 (1978-05-01), Herman et al.
patent: 4577487 (1986-03-01), Dooley
patent: 5370159 (1994-12-01), Price

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