CONNECTION OF SUBMERGED CROSSING PIPELINES Russian patent published in 2004 - IPC

FIELD: construction engineering; submerged pipelines. SUBSTANCE: proposed crossing contains main and parallel standby pipelines of equal diameter, pipeline connecting units and shutoff valves. Pipeline connecting units are made in form of hollow truncated cone with flanges on ends connected, respectively, with mating flanges of main pipeline. Concave cover is furnished with branch pipes located at angle relative to each other and symmetrically relative to axis of main pipeline, main and standby pipelines being extensions of branch pipes. Smaller base of cone central projection of cover are furnished with cylindrical supports on which swivel with sealing members is mounted inside cone. Curvilinear tubular sub is built into swivel so that its one end constantly communicates with main pipeline, and opposite end communicates in turn with branch pipes by means of which angular forks of pipelines are formed curvilinear changing into parallel sections. EFFECT: enlarged range of technical means. 4 cl, 3 dwg