FIELD: construction.
SUBSTANCE: underwater unit for fluid loading / unloading without berthing comprises a section of at least two steel pipelines connecting the offloading pump unit with the subsea distribution manifold. The manifold contains a drainage tank with shut-off valves, pressure relief valves and a drain pump. The drain vessel is made as a steel vessel the upper part of the housing of which contains the receiving and drain throats. The housing bottom has bypass holes. The inner space of the steel vessel is divided into two chambers by an orifice of elastic material. The receiving and drain throats are located on the same side of the orifice. The overflow holes are located on the other side of the orifice.
EFFECT: possibility for improvement of efficiency of protection of underwater pipelines from hydraulic impact phenomena while preventing the discharge into environment.
5 cl, 7 dwg
