CTS full contact internal floating roofs


	Tank seals	Internal floating roofs	Petrochemical domes	Floating suction lines	Dry break couplers	Architectural domes	Bulk storage domes
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Full contact internal floating roofs

In recent decades internal floating roofs have developed into important systems to reduce emissions. When looking at internal floating roofs there are 2 basic designs available, being either a full contact roof or non-contact internal floating roof. The non-contact floating roofs are the most widely installed roofs world wide, for economic reasons. Typically they are based on aluminium pontoons, covered with a vapour tight deck skin to prevent product vapours to migrate in the space on top of the floating roof. The more recent developmen is the full contact aluminium roof. Where non conact roofs have a vapour area, Full contact roofs completely seal the space above the floating roof, preventing the evaporation at the most efficiont point, the source.

Full contact roofs have several advantages over a non-contact roof. These are the most important:

-	high emission reduction, as the roof eliminates the product – air interaction over large areas, thus preventing evaporation of the stored productat the source
-	strong and rigid roof, therefore better suited for blending and Nitrogen pigging operations
-	better corrosion resistance as a result of higher deck skin material thicknesses
-	low building height as a result of the roof displacing liquid over its entire surface, so any submergence result in even buoyancy on the complete surface
-	only rim seal fire protecting foam systems required for metallic full contact roofs (NFPA11)
-	emission reduction of Volatile Organic Carbons exceeding 98%
-	complies fully with API 650 (2003) Appendix H standard
-	suitable for high filling and emptying rates as well as Nitrogen pigging, mixing and blending operations
-	can be equipped with several different seal designs in an extensive range of materials

The CTS direct contact roofs are manufactured from aluminium panels, incorporating a light weight but strong honeycomb aluminium stiffening structure. The individual panels are fully welded and pressure tested prior to shipment, so the all important integrity of the panels is guaranteed. On the jobsite the panels are positioned into the tank and easily assembled using a state-of-the-art hook and pin design to interconnect the elements. Apart from being very effective a direct contact roof is also low in height, maximising storage capacity for the tank involved.