(1) The specification material for flame retardant impregnation treatment, the amount of solid flame retardant grade A fire door wood per cubic meter is greater than 110 kg, grade B fire door wood per cubic meter is greater than 90 kg;

(2) Kiln dried wood;

(3) Processing of dried wood into specifications;

(4) Secondary drying of flame-retardant impregnated wood;

(5) The flame-retardant treatment specification material D2 is refined, sanding, milling groove, tenon, drilling, embedded expansion fire strip F, assembly;

(6) Inspection, packaging and warehousing.

The fire retardant problem of wooden fire door

In actual production, some enterprises reduce the content of flame retardant agent in wood of wooden fire door, or wood does not fire retardant treatment at all. The survey of some enterprises shows that it is a common practice in production to immerse the frame and frame of the door in a solution of flame retardant for several minutes after assembling the frame. Under normal temperature and pressure, the solution of flame retardant can only penetrate into the range of 2mm on the surface of most of the wood within 1 hour, and it has no obvious effect on improving the fire resistance limit of the wood of fire door.

The carbonization rate and flame retardancy of wood of different species vary greatly. Some enterprises use wood of willow tree and other tree species in type certification testing, but use wood of any tree species in production.

Fire door internal filling materials are mainly what kinds

Fire door internal filling materials are mainly: rock wool, aluminum silicate red cotton, perlite, silicon drill fire board, etc.. Fire prevention LAN's main accessories are smoke bar , door closers (keep the door closed, such as used in the regular door to play the role of the fire can quickly close the door), alignment device (in order to close the double door between the fan. Conventional accessories are fire lock, push rod lock, hinge, fire glass and so on.

The setting of fire doors in architectural design generally only clearly stipulates the requirements for the grade of fire doors, and does not specify the material requirements of the door. That is how to purchase in the actual configuration? Many users who purchased such products for the first time are confused. Where to use wood fire doors and where to use steel fire doors. Zonle wooden door will tell you:

Although the relevant building codes do not give clear requirements for the selection of fire door materials, there are still certain requirements in the actual configuration. Generally speaking, wood fire doors are generally used indoors and steel fire doors are mostly used outdoors, but this is not the case. , just the vast majority.

Wooden fire doors are generally used indoors mainly at stair entrances, where wooden class B fire doors are used; the pipeline wells are both strong and weak current wells, and wooden class C fire doors are used; the doors for crowded places and rooms, such as The doors of Internet cafes, cinemas, KTV private rooms and the firewalls in hospitals, schools and stations are made of wooden Class A fire doors.

The parts where steel Class A fire doors are used include power distribution rooms, transformer rooms, elevator rooms, diesel generator rooms, boiler rooms, etc.; Class B fire doors are mainly used in control rooms, ventilation machine rooms, fire doors in warehouse stairwells, etc. ; Ventilation ducts, garbage ducts, and inter-connected doors in the power transformation and distribution room are all steel Class C fire doors.

As mentioned earlier, the choice of fire door material is not clearly specified. The above list is only the common setting methods in the industry, and some places have different settings and use. In short, no matter which material fire door is selected, it must be according to the building And fire door specification requirements configuration.

The so-called wooden fire door is a kind of wooden fire door after special treatment. The solid wood fire door in the market is divided into three categories according to the fire resistance limit: A, B and C. The fire resistance requirements are 72min, 54min and 36min respectively. Solid wood fire doors have relatively high requirements for their wood materials, and their moisture content is generally required to be maintained at about 12%, so as to ensure the fire resistance of wood fire doors and not easily deformed during use.

In addition, the requirements for hardware accessories of fire doors are also quite high. The hardware accessories used to decorate solid wood fire doors must be fire resistant hardware accessories. The main hardware accessories are: fire hinges, fire latches, fire door locks, fire sequencers and Fire door closers, etc.; if the hardware accessories of the fire door do not have fire resistance, then the fire resistance of the fire door will not be guaranteed during use. The fire resistance of solid wood fire doors needs to meet certain standards. During the fire resistance test, the decorated solid wood fire doors should be able to meet the conditions specified in the standard within the time required for their fire resistance