| 摘要 |
A firestopping sleeve (1, 1') for a conduit (4) extending through an opening (2) in a wall (3) has the conduit surrounded by a torus shaped fire-proof fabric tube (5) filled with intumescent material (13) which expands in the event of fire and sealingly closes off the opening (2). The fabric tube (5), has at least one tube section (6a, 6b) lying within the torus and closed with respect to the rest of the fabric tube (5). |
