Floating Roof Double Deck Pontoon

Sketches are provided in the article depicting the pan type pontoon and double deck arrangement for external floating roof tanks.

Floating roof double deck pontoon.

Figure 1 4 single deck pontoon type floating roof bob. The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area. Double deck pontoon roofs which are designed with concentric annular pontoons with radial bulkheads in each pontoon section. In my humble opinion the double deck arrangement would be a more robust design but may cost extra and a detailed techno economic evaluation would be needed to arrive at the optimum option.

Over the years jm dixon associates has undertaken the design of many floating roofs both double and single deck for world renowned clients such as philips 66 exxon mobil and ineos. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid. The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks. A double deck type floating roof has two complete decks covering the entire liquid surface.

Pontoon type floating roofs are the most economical type of floating roofs in the market. The roof is consisted of a portion divided by the ring and radial bulkheads into several compartments and a portion called the flexible bay. Types of external floating roof consist of. These include new builds together with the evaluation of existing roof designs for suitability such as analysing the various flotation cases and repair.

Ergil storagetech internal floating roofs which minimize the evaporation losses of stored products such as jet fuels gasoline diesel and crude oil can be supplied as aluminium or stainless steel.