Fire protection of smoke exhaust ducts
Fire protection of ventilation systems – First of all, a measure that will prevent the spread of smoke, fire and harmful combustion products. Ventilation in case of fire contains two dangers – rapid spread of smoke and re-ignition of flammable materials. Both the first and the second not only complicate rescue operations, but also increase damage. That is why, when commissioning a facility, fire protection measures should be taken for the emergency ventilation system in order to increase its resistance to the effects of extremely high temperatures.
Which premises require fire protection first and foremost?
The gases released during a fire can reach critical temperature values. Of course, one of the most important conditions for the use of emergency ventilation– ability to withstand for minutes t 600 °С.
First of all, the following structures require fire protection:
1
Buildings with high traffic – shopping and entertainment complexes, cinemas, business centers, educational institutions, etc.
2
Residential multi-storey buildings;
3
Structures located underground;
4
Premises intended for storage of flammable and lubricating products;
5
Steel and chemical foundries, plasma cutting shops and other production facilities involving the use of open fire.
Household premises also require fire protection – boiler rooms, baths, rooms with fireplaces.
What materials are used for fire protection
To carry out fire protection measures, the following materials are most often used:
1
Mineral wool in any form (rolls or sheets);
2
Specialized intumescent paints;
3
Mastics;
4
Thermal insulation barriers;
5
Combinations of rolled insulation and paints.
Fire protection of forced ventilation involves the use of vibration-resistant soundproof materials, because such installations make a lot of noise and vibrate.
Basalt slabs
Fire protection is achieved by using mineral wool, vermiculite mats, basalt, foil, gypsum fiber cloth and asbestos cement. Installation is carried out using screws, clamps, wire. However, if the pipes fit tightly to the walls or are located in a corner, then this option will most likely have to be abandoned. The reason is that these materials increase the weight and size of the pipes.
Fire protection with paint and varnish
Special paints and varnishes that swell under high temperatures are often used for fire protection of ventilation. The resulting coating has high thermal insulation characteristics. The compositions can be applied without problems even in inaccessible places. The disadvantages include a high price and lower efficiency compared to other methods.
Mastic
The pipes are coated with mastics based on silicates, phosphates, mineral wool, and nepheline. The recommended layer thickness is 10-50 mm. This method is affordable, quite effective, and easy to implement. However, applying the mastic requires equipment, which means that such work should be entrusted to specialists.
Fire protection by creating a barrier
If a fire protection barrier is created, the following methods are used: concreting, plastering on a grid and arranging a brick box. These methods are gradually losing popularity, because they make the structures much heavier and require reinforced fasteners.
The fire protection compound “Fibrogein“, PROMATECT-L500 boards, Pirex paint, and Izovent rolls are especially popular. It is better to discuss the choice of one or another option with a specialist.
To apply any fire protection, it is necessary to prepare the surface – clean, level, dry. The glue is usually applied in two layers, the material – with a slight offset and also in two layers.
The specialists of the Server Service company know everything about smoke exhaust ducts! We design emergency ventilation systems, manufacture air ducts for them and carry out installation and commissioning work.
You can learn more about all the services we provide and the equipment supplied to the Uzbek market in the “About Us” section.
Server-Service is your reliable partner in creating a comfortable climate in your home, office or enterprise!
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Contacts:
Telephone: +998 (71) 502 01 32, +998 (98) 128 42 00;
Telephone: +998 (70) 202 01 32,
Email: manager.serverservice@gmail.com
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