Fireproof glass, mainly used to control the spread of fire or smoke, is a measure typeFireproof materialThe fire prevention effect is evaluated by fire resistance.It is processed and treated by special process, and can maintain its integrity and thermal insulation in the specified fire resistance testSpecial glass。Float plane glass can be used as the original piece of fireproof glass,Tempered glass，Composite fireproof glassOptionalSingle piece fireproof glassmanufacture.
On March 15, 2024, the March 15 evening party of China Central Radio and Television Station in 2024 exposed the fire resistant glass, which was falsified.[1]
On March 16, 2024, in view of the exposure of the "March 15" party of China Central Radio and Television Corporation, the market supervision departments in Tianjin and Hebei, together with the public security organ, carried out on-site investigation on the production and sales enterprises of unqualified fireproof glass, and seized 24 barrels of fireproof liquid, 468 pieces of composite fireproof glass, 5 pieces of single fireproof glass, and 122 pieces of single fireproof glass logo impressions.The public security organ summoned 17 relevant personnel and took criminal coercive measures against 3 suspects involved.
There are five kinds of fireproof glass, one is laminated composite fireproof glass, the other is wired fireproof glass, the third is special fireproof glass, the fourth is hollow fireproof glass, and the fifth is high-strength single-layer cesium potassium fireproof glass.
By product category
Fireproof glass
Fireproof glass can maintain its integrity during specified fire resistance testSpecial glass, divided into three categories according to product types:
Class A
Simultaneously meetFire integrity, fire insulationFire resistant glass as required.includeComposite fireproof glassandPoured fireproof glassTwo.This kind of glass has the properties of light transmission, fire resistance (smoke, fire and heat radiation shielding), sound insulation and impact resistance, and is suitable for building decoration steel and woodfire-proof door, window, ceiling, partition wall, daylighting roofhang wallL , perspective floor and other building components that need to be both transparent and fireproof.
Category B
At the same time, the fireproof glass meets the requirements of fire integrity and thermal radiation intensity.This kind of fireproof glass is mostly composite fireproof glass with the characteristics of light transmission, fire prevention and smoke separation.
Class C
Single piece fireproof glass that only meets the requirements of fire resistance integrity.This kind of glass has the characteristics of light transmission, fire prevention, smoke separation and high strength.Applicable toNo thermal insulation requirementsFireproof glass partition wall, fireproof window, outdoorcurtainEtc.
Fireproof glass is divided into composite fireproof glass (grouting type and composite type, with good thermal insulation performance of grouting fireproof glass and good fireproof performance of composite fireproof glass) and single piece fireproof glass.
composite
It is composed of two or more layers of glass sheets and one or more layers of water soluble inorganic fireproof adhesive interlayer.
Fire prevention principleflameIsolate high temperature and harmful gas.Finished products can be ground, punched, and cut by changing the ruler.
When it is applicable to external windows and curtain walls, the design scheme shall consider the fire resistant glass andPVB laminated glassUsed in combination.Scope of application: fireproof doors and windows, fire compartments and important parts of building rooms, corridors and passagespartition wall。
Monolithic
Single piece fireproof glass is a kind of fireproof glass with single layer glass structure.Keep the fire resistance integrity within a certain period of time, block the open fire and toxic and harmful gases on the fire facing surface, but do not have the function of temperature insulation.
It is applicable to external curtain wall, outdoor window, daylighting roof, smoke retaining wall, fireproof glass frameless door, and partition wall without thermal insulation requirements.
Perfusion type
It is made of two layers of glass (three layers of glass can also be used for special needs) and sealed with special flame retardant adhesive tape around.The fireproof glue filled in the middle is solidified into transparent jelly and bonded to the glass.
Fire prevention principle: in case of high temperature, the transparent gelatinous fireproof adhesive layer in the middle of the glass will harden rapidly, forming an opaque sheetFire insulation board。While preventing the flame from spreading, it also prevents the high temperature from transmitting to the back fire surface.This kind of fireproof glass not only has fire and heat insulation performance, but also has excellent sound insulation effect.It can be processed into an arc.
It is applicable to fireproof doors and windows, building patio, atrium, shared space, and partition wall of fire compartment in computer room.
Important note: black sealing frame is exposed around the glass, which is suitable for inlaying installation of surrounding layering.Consult the manufacturer in advance for reasonable suggestions when it is used for unshielded front sun and west facing windows.
The chemical composition of borosilicate fire-proof glass is generally 68% to 78% SiO ₂, 10% to 13% B ₂ O ≮, 2% to 4% Al ₂ O ∨, and 4% to 8% R ₂ O.
Common specifications
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Product Comparison
Visible light (%)
Heat transfer coefficient
Obscuration coefficient
Transmissivity
reflectivity
W/㎡C
SC
6mm glass
eighty-nine point one
eight
five point seven three
zero point nine five
6mm cesium potassium fire prevention
fifty
twelve
three point nine nine
zero point six four
6mm glass+12A+6mm glass
seventy-nine point eight
fourteen point four
two point seven six
zero point eight two
6mm cesium potassium+12A+6mm glass
forty-nine point nine
fifteen point two
one point eight five
zero point four six
8mm cesium potassium+12A+8mm glass
forty-nine point five
fifteen
one point eight five
zero point four five
10mm cesium potassium+12A+10mm glass
forty-nine
fourteen point eight
one point eight four
zero point four four
application
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Since the batch production of single piece fire-proof glass in China, fire-proof glass has been more widely used, but there are several points to be noted when using:
1. Before selecting fireproof glass, it is necessary to know the specific requirements for fire protection of the fireproof components composed of fireproof glass, such as fire protection, heat insulation or smoke separation, and fire resistance limit requirements.
Fireproof glass
2. Monolithic and composite poured fire-proof glass shall not be likeOrdinary flat glassIn that case, the glass knife must be cut to length, but the composite (dry process) fireproof glass can meet the cutting requirements.
3. When selecting fireproof glass to form fireproof components, in addition to considering the fireproof durability of glass, its supporting structure and various elements must also meet the needs of fire resistance.
Monolithic cesium potassium fireproof glass, by specialchemical treatmentIon exchange was carried out at high temperature for more than 20 hours to replace the metal sodium on the glass surface, forming chemical tempering stress;At the same time, after physical treatment, high-strength compressive stress is formed on the glass surface, which greatly improves theImpact strengthWhen the glass is broken, it will appear as tiny particles, reducing the harm to human body!The strength of single cesium potassium fireproof glass isOrdinary glass6-12 times of, yesTempered glass1.5-3 times of.
ChineseBuilding codeIt is required that all products installed on partitions with fire protection requirements should be sampled by the provincial fire brigade where the enterprise is located and sent to the national designatedFireproof materialTesting center (i.e. Sichuan and TianjinNational Center for Quality Supervision and Inspection of Fireproof Building MaterialsAny company) must meet the specification requirements and obtain the inspection report issued by these organizations before sales!
The fire resistance test of single cesium potassium fire-proof glass is carried out according to the current national standard, and the test results are in conformity withNational Standards of the People's Republic of ChinaGB15763.1-2001 Safety Glass and Fireproof Glass for Building.
The advantage of single cesium potassium fire-proof glass is that it is not so closely related to the temperature at which it can work, but it is able to withstand the impact of heat waves and rapid changes in temperature, which depends on the specific heat capacity of the glass (it can affect the rate of temperature rise), thermal conductivity (the rate and distribution of heat passing through the glass) and thermal expansion rate,At the same time, single cesium potassium fire-proof glass can withstand quenching treatment from 300 ℃ to cold water!
The thermal conductivity of single cesium potassium fire-proof glass is 1.13W/M ℃
The thermal expansion rate of single cesium potassium fire-proof glass is: (8.5-9.5) * 10-6/℃, which is the same as the original glass
Water resistance conforms to ISO719-HGB and ISO720-HGA standards
Acid resistance meets ISO1776 standard
Alkali resistance meets ISO695-A standard
Compared with the traditional grouting fire-proof glass, the single cesium potassium fire-proof glass is characterized by high weatherability in addition to high strength and easy installation!chemical grouting In addition to the bubbles that are easy to appear in the production process, the fireproof glass quickly turns milky white under the action of ultraviolet radiation and flame, and loses the basic function of glass permeability, so it is impossible to observe the fire!The single cesium potassium fireproof glass remains transparent under the action of ultraviolet light and flame, without any change!
matters needing attention
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As a new building fire protection product, fireproof glass is adopted by more and more buildings, but there are no special specifications and standards for the design and inspection of such products.The following three aspects shall be paid attention to during design:
1. Application of fireproof glasscurtainThe design of the partition is not simply to change the non fire-resistant materials used in the curtain wall or partition into fire-resistant materials, nor to change ordinary glass into fire-resistant glass, but to consider it as a fire protection system.
2. Fire preventionglass screen wallAndpartitionThe fire resistance performance grade that can be reached by the can only be determined by taking into account the fire resistance grade of all factors of the whole system. Subjectively, it may make mistakes, and if necessary, it needs to do detection tests to determine.
3. When designing and selecting fireproof glass, it is necessary to pay attention to the corresponding relationship between the size of the glass plate and the fire resistance grade.
Fireproof stove
It is mainly used to test the performance of fireproof glass. There is a temperature detector outside the furnace, which can be heated to 999 ℃.
CCTV exposure
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On March 15, 2024, the March 15 evening party of China Central Radio and Television Station in 2024 exposed the fire resistant glass, which was falsified.[1]
