NEREFCO (BP-TEXACO JOINT VENTURE) ORDERS DIRECT CONTACT ROOF FROM CTS:
Internal floating roofs have developed in recent decades 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.
Being a reliable and economic roof, many of these have been installed at terminals worldwide in both petroleum and chemical service |
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Full contact roofs have several advantages over a non-contact roof. Some of the more important features for a full contact roof are the following |
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high emission reduction, as the roof eliminates the product – air interface over large areas, thus automatically preventing evaporation of the product stored |
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strong and rigid roof, therefore better suited for blending and Nitrogen pigging operations |
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better corrosion resistance as a result of higher deck skin material thicknesses |
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low building height as a result of the roof displacing liquid over its entire surface, so any submergence result in equivalent buoyancy on this complete surface |
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only rim seal fire protecting foam systems required for metallic full contact roofs |
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Honeycomb panel based full contact roof:
Within the product range of CTS there is an excellent Honeycomb structure aluminium full contact roof. 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.
Based on these engineering features CTS will install a 36 m. internal floating roof for Nerefco (BP-Texaco joint venture) early 2006 in cooperation with Mercon.
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