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.

Pontoon type floating roofs are the most economical type of floating roofs in the market. Double deck pontoon roofs which are designed with concentric annular pontoons with radial bulkheads in each pontoon section. The sketches shown illustrate the above single deck and double deck floating roof with the critical components for these structures. 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.

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. 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. Types of external floating roof consist of.

The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area. 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. External floating roof tank double deck type an external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate.

Figure 1 4 single deck pontoon type floating roof bob.