The Allentech HC Full Contact IFR is a premium Honeycomb Full Contact Aluminum IFR.
The Allentech HC is designed in accordance to API650 and EN14015 with a minimum buoyancy ratio of 2x against the roof dead load plus friction force exerted by perimeter seals using a drag coefficient of no less than 3 lbs/ft. The roof is capable of staying afloat while having two adjacent flotation compartments flooded. The roof buoyancy is based on a Specific Gravity of 0.7 or the stored product, whichever is less.
The panel modules are 5ft x 10ft x 1.5in deep (1524mm x 3048mm x 38.1mm). Rim modules are designed to match the tank shell radius. Each sandwich-module consists of a top and bottom layer of .050in aluminum sheet with an internal honeycomb structure to provide stiffness. A high quality aluminum extrusion forms a frame around the sheet and honeycomb, and this is completely seal welded into a fully enclosed buoyant compartment.
Each module contains a resealable vapor detection port for pressure testing in our factory, and also for future testing during out-of-service maintenance. Damaged panels that are installed can be easily replaced during future maintenance. Every module is fully inspected and pressure tested with helium leak detection equipment prior to shipment.
The Hook and Pin design of the modules allows for quick installation and forms an high strength bolted seam with extremely low seam emission losses.
