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Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...
Expanded polystyrene (EPS) concrete (also known as EPScrete, EPS concrete or lightweight concrete) is a form of concrete known for its light weight made from cement and EPS (Expanded Polystyrene). It is a popular material for use in environmentally "green" homes.
The deck (floor) is composed of four interlocking aluminum plates, which are fixed to the "thrust board" at the bow end and the transom at the stern. This rigid structure, spanning the entire internal area of the boat, prevents the hull from collapsing or "taco-ing" under power.
An inflatable boat is a lightweight boat constructed with its sides and bow made of flexible tubes containing pressurised gas. For smaller boats, the floor and hull are often flexible, while for boats longer than 3 metres (9.8 ft), the floor typically consists of three to five rigid plywood or aluminium sheets fixed between the tubes, but not ...
In the 1950s, polyurethane foam, a stiff, lightweight, buoyant material, was invented. Fisher imagined it as a replacement for the lightweight balsa used in small boat construction, and in 1954 he constructed a small sailing dinghy filled with the foam, with a design similar to the Sunfish.
An additional benefit of the coating was it acted as a sound dampener, containing the U-boat's own engine noises. [1] Alberich tiles as they appear on U-480. The coating had its first sea trials in 1940, on U-11, a Type IIB. [1] [5] U-67, a Type IX, was the first operational U-boat with this coating. [2]
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