Single Deck Floating Roof Tank

Fabricate install new single deck annular pontoon floating roof the screening estimates are based upon the following assumptions.

Single deck floating roof tank.

External floating roofis where the roof floats on the product in an open tank and the roof is open to atmosphere. No hours are included for a dedicated fire safety watch. Floating roof atmospheric storage tanks. There are 2 types of floating roof.

These include new builds together with the evaluation of existing roof designs for suitability such as analysing the various flotation cases and repair. Internal floating roofis where the roof floats on the product in a fixed roof tank. The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks. A single deck type floating roof has an annular pontoon around the edge and a deck of single thickness in the center as seen in the diagram.

There is a annular space with seal gland between the floating roof and the tank wall to separate air when stored liquid float up or down on the roof greatly reducing evaporation loss in the storage process. Good access exists to tank for equipment and materials. A double deck roof is appreciably stronger than a single deck roof. Doorsheet is a minimum of 8 high x 8 6 wide.

The annular pontoon is divided into several chambers by radial bulkheads. 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 is difficult to design pontoons for smaller di ameters and single deck roofs with larger diameters can be too flexible.