Method for providing a combustible gas inflator

A combustible gas inflator and a method for filling and sealing the inflator are provided. The inflator includes an enclosure (112) configured to receive and store the combustible gas under pressure. The enclosure (112) has an outer wall (192) comprising an exterior surface, an interior surface, and a fill aperture (194) extending therethrough. The fill aperture (194) has a first aperture portion (198) and a second aperture portion (196). The first aperture portion (198) is proximate the exterior surface and the second aperture portion (196) is proximate the interior surface, wherein the first aperture portion (198) is larger than the second aperture portion (196). The inflator further includes a sealing member (113) configured to seal the fill aperture (194). The sealing member (113) has a first portion (130) and a second portion (128). The first portion (130) is configured to sealingly engage a portion of the second aperture portion (196) and the second portion (128) is configured to sealingly engage a portion of the first aperture portion (198). The first portion (130) seals the combustible gas within the enclosure (112) and the second portion (128) is configured to be welded to the enclosure (112) by a welding process that would ignite the combustible gas if the combustible gas were exposed to the welding process.