| 摘要 |
<p>PURPOSE:To eliminate the variance in the installed condition and shorten the period of installation by forming with graphite having a hole for passing a piping through and causing volumetric expansion at high temperatures. CONSTITUTION:A fixing device for penetrating a fireproof partition is disposed in a wall through hole 5. A sheath pipe 54 is slightly smaller than the inner diameter 21 of a fixing frame and is sealed so that expansion graphite does not leak outside. When a fire environment reaches a high temperature range, expansion graphite is heated to expand. This pushes a flexible pipe in, closes the inner hole of the flexible pipe, stops the supply of oxygen, and prevents fire from spreading further.</p> |
