LIQUID STORAGE SYSTEM

摘要

14 LIQUID STORAGE SYSTEM A storage system for liquid is disclosed which includes an external containment vessel which is open on top and an internal storage tank mounted within the external containment vessel so as to extend above it. The internal tank and the containment vessel are constructed and arranged so as to have a substantial outer storage space formed between them. This storage space is covered by a roof structure which extends from a point below the top of the internal storage tank to cover the containment vessel. A venting structure is provided at a location on the internal tank above the roof structure, where it is exposed to the atmosphere, and a drainage structure provides liquid coupling from the venting structure to the outer storage space.