Tank installation for the storage of liquids
A tank installation for the storage of liquids, especially oil in a floating storage or production installation, including a number of tanks which are connected to pipe systems for supply of liquid to or removal of liquid from the tanks. The installation includes a central section around which the tanks are arranged in such a manner that each tank has an inner sidewall portion bordering on the central section, and the pipe systems are arranged in the central section and include radially extending pipe lengths that are connected to respective tanks.
1. A tank installation for the storage of liquids, comprising a number of tanks which are connected to pipe systems for supply of liquid to or removal of liquid from the tanks, wherein the tank installation comprises a central section around which the tanks are arranged in such a manner that each tank has an inner sidewall portion bordering on the central section, and wherein the pipe systems are arranged in the central section and comprise radially extending pipe lengths that are connected to respective tanks, further wherein the tanks are arranged in several levels such that the inner sidewall portions of the tanks at the different levels lie above each other, and wherein the pipe systems include a ring conduit for each level of tanks, each ring conduit being connected to the tanks at the appurtenant level via short radially extending pipe lengths.
2. A tank installation according to claim 1 , wherein at least two ring conduits are connected to each other via a vertically extending pipe length.
3. A tank installation according to claim 2 , wherein the ring conduits are connected to the vertically extending pipe length via valves at the ends thereof.
4. A tank installation according to claim 1 , wherein the ring conduits are provided with valves between each of the radially extending pipe lengths, and also the radially extending pipe lengths are provided with valves.
5. A tank installation according to claim 1 , wherein some of the ring conduits are arranged to be connected with a filling line and with a discharge line for the liquid in question.
6. A tank installation according to claim 1 , wherein at least some of the ring conduits are connected to an appurtenant pump.
7. A tank installation according to claim 1 , wherein the installation is constructed as a floating unit, wherein the unit includes a number of ballast tanks arranged along the outer walls and the bottom of the unit, so that they have a generally L-shaped cross-section, the ring conduit at the bottom of the central section being connected to the ballast tanks via respective radially extending pipe lengths, and further is connected to a pump which may be connected alternatively to a sea chest at the bottom of the unit, or to a discharge line for ballast water.
8. A tank installation according to claim 1 , wherein said liquids comprise oil in one of a floating storage and production installation.