The characteristic of the EI 180 fireproof sleeve (otherwise called collar) (EN 1366-3) is that it is made of intumescent material (wrapped in a galvanized steel sheet bracelet) which, in the event of a fire, expands to compress the tube avoiding the passage of flames, vapors and combustion gases. The fire resistance of the sleeve is established through tests carried out according to an international reference standard, EN 1366-3. The resistance class, i.e. the sealing time of the sleeve, is attributed through different test configurations, i.e. with pipes open and / or closed between two rooms, both for the floors and for the walls. In the case of Bampi fire-resistant sleeves, the fire resistance class is EI 180 in U / C configuration (open / closed).

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