Divided by function: access control fire door, indoor fire door, explosion-proof fire door, fast closing fire door, fire fast opening fire door in case of fire, fire insulation door, etc.;



Divided by technology: electronic fire door, built-in fire door closed multi-function fire door, etc.;



According to the structure: fire door with fire glass on the door, fire door with bright window, fire door with glass with bright window, no glass fire door, etc.;



According to the opening mode, it is divided into: flat fire door and push-pull fire door;



Divided by material: wood fire door, steel fire door, steel fire door, glass fire door, other materials fire door;



According to fire resistance: from the original classification according to A, B and C, to the new version according to thermal insulation fire doors (class A), - partial thermal insulation fire doors (class B), non-thermal fire doors (class C).

The role of fire door filling material



1, rock wool material



Rockwool originated in Hawaii. After the volcanic eruption of Hawaii Island, the residents of the island found a wisp of melted soft rock on the ground, which is the rockwool fiber originally recognized by human beings. The production process of rockwool actually simulates the natural process of the volcanic eruption of Hawaii. After melting at high temperature above 1450℃, the international advanced four-axis centrifuge is used to centrifuge fiber at high speed. At the same time, a certain amount of binder, dust-proof oil, and water-repellent agent are sprayed into the cotton collector, collected by the pendulum process, and solidified and cut after laying cotton by three-dimensional method, forming rock wool products with different specifications and uses.



2, perlite fire door core plate



Perlite fire door core plate This product is non-toxic, tasteless, non-combustible, non-corrosive steel plate, 1100℃ high temperature does not melt and does not deformation, the combustion performance reaches A level. The perlite fireproof board meets the requirements of the new standard for fire door filling materials.



(1), good fire performance, can better play the role of fire prevention, environmental protection materials all environmental protection products, no pollution, this product and glass fiber reinforced materials and inorganic binder composition.



(2), with non-combustible, non-explosive, water resistance, oil resistance, chemical corrosion resistance, non-toxic and good mechanical strength, the product can be sawing, drilling, planing and other mechanical processing. High fire resistance, in the simulated combustion test, the flame does not deform when the higher temperature reaches 800 degrees, and has good fire resistance and flame resistance.



(3), the product material is cheap, suitable for a variety of fireproof materials, perlite fireproof board is made of expanded perlite powder a

Class A fire door: the fire resistance limit is not less than 1.5 hours, which is used in other fire partitions (firewalls, fire compartments, atrium, etc.), densely populated places (cinemas, auditoria, etc.), important warehouse doors (confidential rooms, archives, etc.), etc. Class B fire door: the fire resistance limit is not less than 1 hour, used for opening the door on the safety exit (closed stairwell, smoke prevention stairwell and front room, etc.), entertainment building doors (KTV, entertainment halls, etc.), places with high risk of fire homes (kitchens in public buildings, attached warehouses in civil buildings, etc.), room doors used by vulnerable groups (operating rooms, delivery rooms), etc. Class C fire door: the fire resistance limit is not less than 0.5 hours, which is used for shaft protection (pipe well door, etc.), internal communication door and the door of some equipment rooms open to the outside (transformer and distribution room, etc.). For safety reasons, it is recommended to buy fire door brand products.

According to the provisions of the "Code for Fire Protection Design of high-rise Civil Buildings", when the fire protection roller curtain including the temperature rise of the back fire surface is used as the fire resistance limit determination condition, the fire resistance limit is not less than 3 hours. The steel fire shutter is difficult to meet such requirements, therefore, many places require the use of super fire shutter. Therefore, the amount of steel fire retardant roller blinds is becoming less and less.



However, because the steel fire shutter also has its own advantages, therefore, although the amount of steel fire shutter will be less and less, it will still exist on the market, it may eventually be fixed at 10%-20% such a small market share, the main reason is that the steel fire shutter in the state of no need for fire, it can be used as an anti-theft door. For example, the shopping mall can use the fire curtain at the entrance and exit as an anti-theft door, and the cloth fire curtain can only prevent fire but not anti-theft.

The difference between different grades of fire doors is not too obvious in appearance, and it is not easy to distinguish, but we, as engineering practitioners, need to learn to judge.



There are three methods commonly used to distinguish the grade of fire doors on site.



First, check the fire door acceptance data



Check the product inspection report, certificate, production license, fire door electronic ID card and other fire acceptance data when the fire door leaves the factory, which indicates the material and fire door grade.



Second, check the fire door nameplate



Check the manufacturer's nameplate on the fire door frame, which indicates the name, address and contact information of the manufacturer, and also marks the material and fire rating.



Three, measurement of fire door specifications



In order to further confirm the grade of the fire door, it can also be verified by measuring the specifications of the fire door. The thickness of the steel grade A door frame is generally 12cm, and the thickness of the door fan is 5cm; The thickness of the steel B grade door frame is generally 11cm, and the thickness of the door fan is 4.5cm; The thickness of the steel grade C door frame is generally 10cm, and the thickness of the door fan is 4.2cm; The thickness of the wooden class-A door frame is generally 10cm, and the thickness of the door fan is 4.5-5.5cm; The thickness of the wooden B grade door frame is 10cm, and the thickness of the door fan is 4-5cm; The thickness of the wooden class C door frame is also 10cm, and the thickness of the door fan is 4cm.

Fire doors, as one of the measures of fire separation in buildings, are usually used on fire walls, stairwell entrances or pipe well openings to prevent the spread and spread of smoke and fire.



1. Set class-A fire doors on firewalls and fire components that need to be opened



2. Class B fire doors are set up in the evacuation stairs and front room



Fire protection zone to the entrance of the refuge walkway should be set up smoke front room, the use of the front room area should not be less than 6.0 square meters, open the front room door should use a Class A fire door, the front room open to the refuge walkway door should use Class B fire door. When a fire occurs, the fire door can block the spread of fire and smoke within a certain period of time to ensure the escape of personnel.



3. Class C fire doors are set up in vertical pipe Wells



Vertical well such as cable well, pipeline well, flue, exhaust passage, garbage passage, etc., need to set Class C fire door to prevent fire and smoke from spreading through the shaft or pipeline well.



4, important equipment room need to set the corresponding level of fire doors



Fire doors must be set up in important equipment rooms to protect the safety of the equipment. Commonly used equipment rooms include: power distribution room (Class A), ventilation air conditioning room (Class A), fire pump room (Class A), elevator room (Class A), power generation room (Class A), oil storage room (Class A), fire control room (Class B), and fire extinguishing equipment room (Class B).