Fire doors can be divided into normally open fire doors and normally closed fire doors according to their opening state.
Normal open fire door:
● Function: Normally open fire doors remain open under normal circumstances to facilitate the circulation of personnel and materials. When a fire occurs, the fire door is closed by automatic devices such as smoke detectors or temperature detectors to prevent the spread of fire and smoke.
● How to use: The reliability of the automatic closing device needs to be checked regularly to ensure that it can be closed automatically in an emergency.
Normal closed fire door:
● Function: Normally closed fire doors remain closed under normal circumstances to increase safety. Usually used in places such as fire passages that need to be kept closed.
● How to use: No need to rely on automatic devices, but it is necessary to ensure that it can be closed manually and quickly in an emergency.
Installation and acceptance standards:
The installation of fire doors should be the responsibility of professionals. After installation, it is necessary to conduct detailed acceptance in accordance with relevant national and local standards to ensure that the function and quality of the fire doors meet the requirements.