Abstract: A pressure vessel for storing high-pressure gas has a structure including: a nozzle body which is coupled to a vessel body that defines an inner wall surface of the pressure vessel, and has an inner flow path through which gas flows inside and outside of the pressure vessel; and a locker which is fastened to a lower portion of the nozzle body, and the structure is configured to provide dual sealing including sealing at an inclined surface by fastening force of the locker generated by an inclined pressing end of the locker, and sealing in the locker by sealing members.

Abstract: Disclosed is a resin impregnation apparatus. The apparatus includes: a resin supply unit for supplying a resin having a predetermined viscosity downwards; a film formation unit provided at a lower side of the resin supply unit and configured to form the resin supplied from the resin supply unit into a film shape while the resin passes between a pair of rollers spaced apart from each other. The apparatus further includes a fiber supply unit for unwinding a reinforcing fiber and bringing the reinforcing fiber into contact with the film-shaped resin so that the resin is impregnated into the reinforcing fiber to form a resin-impregnated reinforcing fiber.

Abstract: There is provided a pressure vessel. The pressure vessel may include a nozzle-boss comprising a neck part including a hollow portion and a flange part extended outward from the neck part, a liner coupled with the nozzle-boss to provide a space filled with a fluid therein, and a sealing part inserted into a lower end of the neck part to prevent a spillage of the fluid via a boundary between the nozzle-boss and the liner by preventing a direct contact between the fluid and the boundary.

Abstract: There is provided a pressure vessel. The pressure vessel may include a nozzle-boss comprising a neck part including a hollow portion and a flange part extended outward from the neck part, a liner coupled with the nozzle-boss to provide a space filled with a fluid therein, and a sealing part inserted into a lower end of the neck part to prevent a spillage of the fluid via a boundary between the nozzle-boss and the liner by preventing a direct contact between the fluid and the boundary.