Single Deck Pontoon Floating Roof

The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area.

Single deck pontoon floating roof.

The upper surface of the pontoon is slanted down toward the center for drainage purposes and the lower surface. Double deck pontoon roofs which are designed with concentric annular pontoons with radial bulkheads in each pontoon section. Single deck floating roof with ring of pontoons in the periphery and many pontoons upon the membrane this kind of roof combines the strengths of the single deck and double deck floating roofs. Single deck pontoon type floating roof 9 figure 1 5.

The sketches shown. The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks. These include new builds together with the evaluation of existing roof designs for suitability such as analysing the various flotation cases and repair. The deck of single deck floating roofs shall be designed to be in contact with the storage liquid during normal operation regardless of the service.

Single deck roofs which have distributed buoyancy across the entire roof area through the provision of localized buoyancy chambers which are welded to the top side of the roof center deck. No hours are included for a dedicated fire. Main two types of floating roof tanks single deck floating roof in single deck roof which is also called pontoon roof the buoyancy is derived by the pontoons according to api 650 3. Tank is clean gas and lead free and ready for hot work.

Single deck floating roof tank 12 figure 1 7. Fabricate install new single deck annular pontoon floating roof the screening estimates are based upon the following assumptions. 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. Doorsheet is a minimum of 8 high x 8 6 wide.

Schematic sketch of the stabilised condensate tank 17. Good access exists to tank for equipment and materials. Double deck type floating roof 10 figure 1 6. Having thus described my invention what i claim as new and desire to secure by letters patent of the united states is.

A in region with increased wind pressure where it is possible to tear the membrane from the product and it must be prevented. Single deck type. The annular pontoon is divided into several chambers by radial bulkheads. 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.

Different roof configurations were shown in figure 100 1.