| abstract |
A fire protection sleeve ( 1 ) for a pipeline ( 4 ), which extends through an opening ( 2 ) in a wall ( 3 ), is surrounded circumferentially at least partly by intumescing material ( 10 ) contained in a fire-resistant folded fabric tube ( 5 ). The fabric tube ( 5 ) forms several circumferential, unilateral inner folds ( 6 ) and the folds ( 6 ) are sewn in each case with a yarn ( 8 ), to an opposite side of the tube, and the yarn melts or burns in the event of a fire. |