Abstract: Provided is a swivel joint for flare system of offshore plant which can be semi-permanently operated even with grease injected once. The swivel joint for flare system of offshore plant proposed comprises a cylindrical body; and first and second connecting members coupled to opposite sides of the cylindrical body, respectively. The swivel joint has an advantage that it can be actually semi-permanently used with the grease initially injected and then the sealing made.

Abstract: A nozzle for a burner boom water spray system of an offshore plant that can more efficiently shield a high heat source generating when combusting gas generating upon drilling crude oil is provided. The nozzle includes: a front ejecting portion having a first nozzle tap at the center; a first side ejecting portion formed at a lower side of the front ejecting portion; a second side ejecting portion formed at a lower side of the first side ejecting portion; and a fastening portion formed at a lower side of the second side ejecting portion and coupled to a member for supplying a nozzle injection fluid. The nozzle provides a side ejecting portion of two stages in addition to a front ejecting portion, and thus an efficient water curtain pattern can be embodied.