Floating Roof Double Deck

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

Floating roof double deck. Double deck roof figure 1 7 consists of upper and lower steel membranes separated by a series of circumferential bulkhead which is subdivided by radial bulkhead. However i would highly recommend that you consider a that the epdm is lying flat on the roof subfloor without any sharp objects that can puncture the edpm once sleepers are laid over top and placed under load. Double deck pontoon roofs which are designed with concentric annular pontoons with radial bulkheads in each pontoon section. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.

You can do a floating deck and is really your only option. The sketches shown illustrate the above single deck and double deck floating roof with the critical components for these structures. Double deck roof is much heavier than single deck one hence it is more rigid. 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.

I m not surprised that steel floating roofs change shape when they are floated or when their temperature changes rapidly. 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 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.

In the same sealing condition compared with external floating roof tank internal floating roof tank can further reduce the volatilization loss as a result of that compared with double deck floating roof on external floating roof tank shaded by fixed roof and the gas phase layer between fixed roof and internal floating plate have a more significant effect on heat insulation. Different roof configurations were shown in figure 100 1. The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks. A stiffer floating roof pontoon or double deck would suffer much less than a frying pan type.

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.