Abstract: A large number of pipelines pass through walls and floors in high-rise buildings, and fire sealing at the penetrating parts is an important mean to block the spread of fire and ensure the safety of buildings and people. The current standards specify the performance requirements for fire sealing structures, but due to the unclear heat conduction and temperature distribution patterns of fire sealing structures and penetrations, the effectiveness of sealing schemes is difficult to ensure. In response to this issue, this article designed fire-resistant sealing specimens to conduct fire resistance tests, analyzed the test phenomena and temperature changes of fire-resistant sealing specimens during the fire process, compared the temperature differences of fire-resistant sealing structures and penetrations during the fire process, and proposed suggestions for the design of fire-resistant sealing structures and the revision of relevant standards.

Key words: fire sealing, penetration item, fire resistance performance, temperature field