Fire door classification

    According to the current national standard for fire door, fire door has a variety of different classification basis. In this paper, according to the classification of different standards will fire door briefly expounded.

    Fire door according to the function classification is divided into heat insulation fire doors and fire door.

    The heat insulation fire doors at the scene of the fire can within the prescribed period of time to keep the integrity of the fire and impermeability, effective isolation of ignition, to prevent the spread of the fire, in order to reduce the casualties and economic losses from the fire.

    Heat insulation fire doors in addition to have the fire door fire integrity and closure, also can effectively isolate heat transfer, make the door back on the surface of the fire temperature control within a certain range, thereby reducing fire damage reduced to a great extent. The fire door we see in daily life belong to this category.

    Fire door according to the different points of fire resistance. According to different fire endurance, the fire door international standard (ISO) points a, b, c three levels.

    (1) class a fire door, fire endurance for 1.5 hours.

    (2) class b fire doors, fire resistance for 1 hour.

    (3) class c fire doors, fire resistance for 0.5 hours.

    Fire door according to different materials, the divided into wood fire door, steel fire door, other materials fire doors, etc. Fire door manufacturer also can according to the actual situation of manufacturer in the case of the ministry of public security for the record to choose suitable materials market and company equipment. The current market can see fire door has the following kinds.

    (1) wooden fire door, door frame are made by the flame retardant processing timber production. Wooden fire door door and door frame can be used with wood grain adornment paper or board, wooden fire door can have higher ornamental. Wooden fire door frame and door for hinge fixed link, in use process is easy to appear the phenomenon such as weak, so the wooden fire door stair general use in residential and office buildings, or pipe using low frequency part of the well.

    (2) steel fire door, door frame and door are made of galvanized steel. Steel fire door based on the characteristics of the material is firm commonly used in shopping malls and other places of high dense and. High relative humidity and applied in the basement of the position such as the basement.

    (3) wooden fire door, steel door frame is made of galvanized steel plate, door adopt wood treated by fire. Steel wooden fire door both robustness and adornment sex, have been adopted in many projects.