Fireproof coating Isovent®. Fire retardant building insulation Advantages of basalt heat and fire retardant coatings
Fire retardant coating is used to prevent fire from entering the ventilation system and the subsequent spread of combustion products throughout the building.
Ventilation that entangles any building (from a small apartment to a huge factory) can spread combustion products in a matter of minutes, exacerbating the situation. Fire retardant duct systems are used to help contain a fire.
Which areas need protection first?
Premises in which it is necessary to install fire protection of air ducts is, first of all:
- Warehouses for fuels, lubricants and flammable materials.
- Crowded places: office buildings, business centers, residential apartment buildings, shopping centers.
- Buildings with high temperatures: baths, saunas, boiler rooms.
The ventilation system, which conducts air through the floors, has several compartments with valves and upholstered with fireproof materials. In this way, isolation of each individual room is achieved.
Cover with insulating materials required pipes for ventilation, air conditioning and smoke exhaust systems. The latter are made to remove smoke from the building, so they need increased protection.
Why do you need fire protection for air ducts?
According to statistics, during a fire, the greatest harm to people is caused by smoke, not fire.
Since air conditioning and ventilation are an integral part of any room, they become extremely dangerous during a fire, as they quickly spread smoke. The fire protection of blowers is primarily designed to delay the time for combustion products to enter the ventilation.
Its second purpose is to isolate the fire so that it "suffocates" without receiving the necessary oxygen. The third is smoke removal, the removal of combustible gases from the room.
The material that covers ventilation ducts outside, during excessive heating, it foams, thereby creating additional thermal insulation. Fire-retardant plaster, impregnation for fabric coatings, special paint are common. These materials are designed to provide fire protection for finishing materials, which tend to be highly flammable and give off toxic smoke.
Rules and regulations for the operation of fire protection of air ducts
The set of rules set legislative act SP 7.13130 of 2013 on fire safety, regulates the installation of ventilation, heating and air conditioning systems.
When laying ventilation systems, it is allowed to use only non-combustible insulating and facing materials "A" class. Within one fire compartment, fire-retardant class B materials can be used. "B1" - semi-fire-resistant materials are allowed for use in air ducts that do not pass:
- through ceilings (including suspended ones) and walls;
- in corridors and escape routes.
According to these rules, the ventilation system, in addition to the fire-retardant coating, must have: air locks, fire dampers. According to the technical regulations for fire safety, fire protection must withstand heating during the evacuation time. For each individual case, a certain time interval is calculated.
Materials must be certified according to fire resistance standards. The fire resistance of a structure is determined by the time from the onset of excessive heating until the destruction of the surface. The fire protection material must withstand temperatures up to 1000º, considering the average temperature of a fire in a room of 850º.
The use of sheet perlite-phosphogel, asbestos-cement, gypsum fiber, gypsum board, basalt slabs, special spraying and fire-retardant paintwork increases the time of ultimate fire resistance up to 240 minutes. According to the regulations, this time cannot be less than 150 minutes.
Methods and materials for protection
Now let's figure out what means can be used for fire protection:
- Basal protection.
- Fire retardant paint.
- sprayed material.
Let's look at each option in more detail below.
Balsat fire protection of air ducts
Basalt is a substance of volcanic origin, which includes impurities of iron, calcium, magnesium and 47% silicon dioxide. It is thanks to silica that basalt is widely used as a fire protection. When exposed to high temperatures, the material does not lose its shape, properties solid body and does not emit hazardous substances.
Basalt fiber, which is used to insulate pipes from fires, is created from the original rock without the participation of extraneous additives that reduce its natural properties.
The most popular and reliable brands are:
- Rockwool (Wired Mat). Hydrophobized heat-insulating boards, light and rigid, are produced in rolls. Size of 1 roll: 800x600x50 mm.
- Pro Vent. Roll dimensions: 10000x1000-1200x20-80. There are options for one-sided lining: foil, reinforced foil, glass, basalt, silicon fabric, metal mesh.
- TIZOL. Roll sizes: 1000-1200x500-600x40-200. Laminated with fiberglass and foil. The price is on average from 326 rubles / m².
- Buffalo. Roll size: 6000x1000x20-80. The material can be lined with basalt, silicon, glass, aluminum foil, metal mesh. Price from 200 rubles / m².
- MBF. Maximum length roll 31000x1000-1500x5-20. The material has a foil coating. Price from 320 rubles / m².
Advantages of using basalt fire protection:
- comparative cheapness;
- high degree of protection;
- non-toxicity;
- incombustibility.
The main downside is requirement for additional fasteners. As a rule, metal staples are used for this, which are destroyed at high temperatures, from which the insulation simply falls off the ventilation duct. It is most reliable to glue rolls of basalt protection on fire-resistant adhesives.
Among other disadvantages: the comparative difficulty of installation, the weight of the structure.
Installation is carried out in several stages:
- Surface preparation. Cleaning, leveling, drying, removal of rust, unevenness.
- Application of adhesive. One layer is sufficient for 30-150 minutes fire resistance, for more a second layer is needed.
- The material is glued in strips. Material consumption per 1 m² is 1.1 m². When installing double protection, the layers come with offset joints relative to each other and the consumption is 2.05 m².
- If glue is not used, then the roll is unwound over the entire surface of the pipe and fixed with metal brackets.
For basalt rolls, the fire resistance limit is 180 minutes with a thickness of 70 mm. The greater the thickness, the higher the protection, and vice versa. Foil options increase resistance to heat energy. Application in conjunction with paint or sprays provides comprehensive and most reliable protection..
The use of rolled basalt fire protection (video)
fire retardant paint
During strong heating, when exposed to temperatures in the region of 100º, such paint foams, forming new layers of carbon fire protection and additional thermal insulation.
Popular brands:
- Thermal barrier. Paint consumption for a minimum protection of 45 minutes - from 0.95 kg / m² depending on the thickness metal structure(the thicker the duct, the less paint required).
- Kedr-Met-V. Consumption averages 1 kg/m².
- Ecofire. Average consumption: 1.11 kg/m².
- KROZ. Average consumption: 1.37 kg/m².
Advantages of fire retardant paint:
- ease of application;
- speed of repair after a fire;
- the structure does not weigh down.
The first minus is that the thickness and integrity of the coating must be constantly monitored, since the paint peels off, falls off, and drains over time. Water-based paints may not have time to foam if the fire is carbon-type (if the temperature rises sharply in the first five minutes). In this case, the paint is ineffective, and the possibility of this type of fire should be considered in advance.
Water-based paint is applied by spraying or brushing. It provides protection for 120 minutes at a thickness of 0.8 mm. The greater the layer of paint applied, the higher the time of ultimate fire resistance.
The more paint is applied to the surface, the more often it needs to be revised and checked for integrity.
The result of applying fire-retardant paint for wood (video)
Sprayed flame retardant material
Spray-on composition for surface fire protection. It is created from mineral microfibrous substances, inorganic binder and additives with a very high fire resistance limit (2-3 hours).
Famous brands:
- POLINOR;
- Thermospray;
- Corundum.
- no need for preparatory work;
- good adhesion to the surface;
- spraying can be painted, covering with an additional layer of protection;
- the most durable method (the layer can remain effective for up to 50 years).
Today, our plant produces two types of fire protection for ventilation systems:
- (with a fire resistance limit of EI 30 - 180) a two-component integrated fire protection system consisting of rolled MBOR basalt material and Kleber fire retardant adhesive.
The main advantages of fire protection of air ducts:
Aesthetics (no external fastening elements are required, except for aluminum adhesive tape for sealing joints, the material looks smooth, beautiful) and the possibility of installation in hard-to-reach places, for example, if the air duct is located close to the wall at a distance of 1-2 cm. In such cases, glue can be applied with the required flow directly onto the material, stretch the resulting workpiece between the duct and the wall and fix it on the duct.
- Heat (with a fire resistance limit of EI 60 - 180) - heat and fire retardant coating, is a stitched mat made of super-thin basalt fiber (BSTV) without the addition of a binder.
The main difference and advantage of this material- improved thermal insulation properties. Where there is a big temperature difference environment and transported air in the air duct, to prevent overheating / cooling of transported air and the formation of condensate and metal corrosion, it is better to use this material. For example, if the air duct runs along the street, where in winter the temperature can drop to -30°C, and the temperature in the ventilation system must not be lower than +20°C.
Non-combustible fire protection of ventilation based on basalt fibers solves the following tasks:
- increases the stability of structures in case of fire (fire resistance limit)
- the development and spread of fire in buildings and structures (loss of integrity and bearing capacity) is prevented.
Basalt mats are flexible and, as a result, have a tight fit to the protected object. Installation of fire protection and thermal insulation of air ducts is simple and meets all the requirements of SNiP and fire safety.
The sizes of basalt mats are produced 1.2 m wide and 6 - 20 meters long. The mats are additionally lined with foil, metal mesh, glass, basalt or silica fabric. This provides the material with additional protection and, at the same time, an aesthetic appearance.
As fasteners, a metal mesh, a steel wire or tape bandage and adhesive compositions that are immune to fire are used.
BOS creates secure solutions that are now trusted by large enterprises throughout Russia. Our products can be purchased in Kazan, Moscow, St. Petersburg, Nizhny Novgorod, Perm, Chelyabinsk, Novosibirsk, Samara, Krasnodar, Rostov-on-Don and other cities of the country. A large volume of production and the constant availability of goods in the warehouse allow us to maintain an optimal ratio of quality and price.
If you have any questions or need advice, please contact the BOS manager in your region.
Ventilation systems, air ducts and a chimney are perhaps the most important in the construction, as they allow people inside the room to breathe, provide a constant supply of fresh air and smoke removal, unpleasant odors etc.
This section presents the fire protection of air ducts and smoke removal, which is necessary for all these systems to work efficiently and smoothly.
Thermal insulation of chimneys
This section of the catalog presents refractory materials for chimney insulation.
On the one hand, the fire protection of the chimney protects the building and the people in it from fire, and on the other hand, it protects the chimney itself, since without reliable insulation it wears out much faster.
Insulating a chimney in a ceiling begins with a well-organized design of the chimney itself and the pipe. It is important that the temperature at the junction of the pipe with the roof does not exceed 50°C. If you want to brick pipe, then to comply with this condition, you will have to make it very thick. That is why many prefer metal pipes.
Subsequently, it is very important to sheathe the entire box with insulating materials that will protect both from fire and from elevated temperatures, as well as from condensation and other possible negative influences. For protection, materials such as fire-retardant boards Termoizol, Superizol, Silka, etc. are used. It is important that the materials are non-combustible!
High-quality fire protection of smoke exhaust is necessary wherever heating is carried out using stoves or fireplaces. And, of course, the isolation of the chimney of the bath deserves special attention, since today there are saunas and baths in almost every suburban area.
Fire insulation of air ducts
Another important and extensive topic is the fire insulation of air ducts. Here we are talking about almost every building, whether it is a residential building or a restaurant, an office center or a music club, etc.
Fire insulation of air ducts is necessary because this system, as it were, permeates the entire building, connecting various rooms, which means that in the event of a fire and lack of insulation, the air duct can be quickly destroyed, which will play a tragic role for people in the premises.
Modern air duct fire protection materials are represented by a wide group of mineral wool boards, pierced mats, roll insulation and other products that can reliably protect these systems from fire and high temperatures.
As a rule, the price of these products is not so high, and the degree of protection they provide is simply priceless!
Isovent ® is a combined fire retardant coating based on basalt rolled material laminated with aluminum foil and PVK-2002 adhesive composition. At the request of the customer, the material is laminatedaluminum foil, polyester reinforced aluminum foil or other type of covering material (metal mesh, glass, basalt or silica fabrics, etc.).
Fire resistance and coating thickness
| Limit fire resistance | Thickness coatings, mm | Layer thickness PVC-2002, mm | Consumption PVK-2002 for 1 m² of surface, kg |
| EI 30 | 5 | 0,45 | 0,60
|
| EI 60 | 10 | 0,45 | |
| EI 90 | 13 | 0,45 |
0,60 |
| EI 150 | 16 | 2 | 2,05 |
| EI 180 | 50 | 2,5 | 3,05 |
Isovent ® is used for fire protection of air ducts in ventilation and smoke exhaust systems.
 |  |
Ease
Isovent ® basalt fire-retardant material has a low density, as a result of which it provides minimum load to air ducts.
Environmental friendliness
Isovent ® is non-toxic and does not form toxic compounds with other substances. Does not contain phenol-formaldehyde resins.
"3 in 1"
Fireproof material Isovent ® provides the air duct with additional heat and sound insulation.
Durability
The service life of the fire-retardant material Isovent ® is comparable to the service life of an air duct.
Mounting
The adhesive composition PVC-2002 is applied to the air ducts. A basalt roll material is applied to the wet layer of the composition and wrapped around the air duct. At the joints, the material is overlapped with an overlap of at least 50 mm. The edges of the roll material are fixed with aluminum tape.
Elements of fastening air ducts to enclosing structures (studs, brackets) are also protected with Isovent ® material.
More detailed description works you will find in the Technological regulations.
| Parameters | Limit fire resistance | Values |
|---|---|---|
| Roll length, mm | EI30; EI 60; EI 90 EI180 | 20000±100 6000±100 |
| Roll width, mm, no more | EI30; EI 60; EI 90; EI180 | 1000±20 |
| Mat thickness, mm |
EI30; EI 60; EI 90 | 30 |
| Bond strength of PVC-2002 adhesive composition with base, MPa, not less than | EI30; EI 60; EI 90; EI180 | 0,10 |
