PIPELINE JOINT FOR UNDERWATER TRANSITION Russian patent published in 2007 - IPC F16L1/00 

FIELD: construction of pipeline transportation system, in particular, construction of underwater main pipeline transition sites.

SUBSTANCE: each of main pipeline and parallel reserve pipeline of equal diameter is equipped with unit for connecting said pipelines, and fittings. Each of pipeline connection units is made in the form of hollow truncated cone with convex cover and flanges joined respectively with flanges of said pipelines. Cover is provided with branch pipes arranged at an angle to one another, symmetrically around axis of main pipeline, with main and reserve pipelines making continuation of branch pipes. Smaller base of cone and central protrusion formed on cover are equipped with cylindrical supports. Inserted journal with sealing members is mounted on cylindrical supports within cone. Curved tubular adapter is built into inserted journal in such a manner that its one end is permanently communicating with main pipeline while its opposite end is alternatively communicating with said branch pipes which form angular Y-shaped pipes of pipelines, said Y-shaped pipes making parallel portions. Curved tubular adapter has longitudinal slit openings having total area making 90-100% or cross-sectional area of main pipeline.

EFFECT: wider operational capabilities of joint.

3 dwg