Redundant seal for pressure vessels

摘要: A space vehicle booster has a lower section and an upper forming joint with seal assembly enclosing closed cavity. The flange joined to the section, collar disposed between flanges. flanges are by bolts, which slightly compress collar. blind slot, opens into cavity separates portion from portion. pressurized gas in urges against flange. inner pair of "O" rings outer rings. Upper chambers passageway exterior opening for evacuating testing integrity seals prior launch.