根据中华人民共和国《建筑设计防火规范》国家标准,防火门既是保持建筑防火分隔完整的主要物体之一,又常是人员疏散经过疏散出口或安全出口时需要开户的门。因此,防火门的开启方式、方向均应满足紧急情况下人员迅速开启、快捷疏散的需要。高层建筑和大型建筑常设有封闭楼梯间和防烟楼梯间,防烟楼梯间和封闭楼梯间的门多数采用防火门。防火门按其耐火极限可分为甲级、乙级和丙级防火门。防火门在火灾中起到很重要的作用,但是经常发现防火门在安装使用和维护过程中存在诸多问题, According to the People’s Republic of China “Building Design Code of Fire Prevention,” the national standard, fire doors are not only one of the main building to keep the building fire separated, and often evacuation through the evacuation exit or safety exit need to open an account of the door. Therefore, the opening of fire doors, the direction should meet the rapid emergency personnel to open, the need for quick evacuation. There are enclosed staircases and smoke-free stairways in high-rise buildings and large buildings. Most of the doors to smoke-proof stairwell and enclosed stairwell use fire-rated doors. Fire doors according to their fire resistance can be divided into Class A, B and C fire doors. Fire doors play a very important role in the fire, but often found in the installation and maintenance of fire doors there are many problems,