What is the difference between explosion-proof glass and tempered glass?
Explosion-proof safety glass panels is also called bullet-proof safety glass panels and laminated safety glass panels; it is a multi-layered float safety glass panels bonded, and the interlayer is filled with a transparent bullet-proof film, usually no less than three layers, and the total thickness is generally more than 19 mm. High-grade explosion-proof safety glass panels Generally not less than 25mm.
Tempered safety glass panels is a process in which transparent float safety glass panels is processed by trimming and then sent to a tempering furnace for high temperature treatment to obtain a high degree of safety glass panels processing technology. Generally, this kind of safety glass panels is used in automobiles, high-rise building curtain walls, home decoration, furniture, etc. Its main characteristics are temperature resistance, good toughness, granular shape after being broken, and little harm to people. It is a common ordinary safety glass panels in life.
Explosion-proof safety glass panels is tested according to the current national standard GB3836.1-2010 "Explosion Environment: General Equipment Requirements for Better Parts", and the product grade is determined according to the impact force. The common grades are: 4 joules, 7 joules, 10 joules
Explosion-proof safety glass panels product models are distinguished by thickness, common thicknesses are: 10-11, 12-13, 16-17, 20-21, 24-25, 30-31, of which thickness 12-13 is more common.
Explosion-proof safety glass panels is widely used in the maintenance and renovation of partition walls of chemical plants, workshop construction projects, and supervision and renovation of fire safety supervision agencies.
For regular explosion-proof safety glass panels, the following three certificates must be provided: explosion-proof strengthened glass inspection report, explosion-proof strengthened glass certificate, explosion-proof strengthened glass supply certificate, and indicate the name of the construction site, the number of use, product specifications, etc. in an obvious position.
3. Related concepts
3.1 Tempered strengthened glass
Tempered strengthened glass/Reinforced strengthened glass is safety strengthened glass. Tempered strengthened glass is actually a kind of prestressed strengthened glass. In order to improve the strength of the heat tempered glass, chemical or physical methods are usually used to form compressive stress on the surface of the heat tempered glass. When the heat tempered glass is subjected to external force, it first offsets the surface stress, thereby improving the bearing capacity and enhancing the resistance of the heat tempered glass itself. Wind pressure, cold and heat, impact, etc. Pay attention to distinguish it from heat tempered glass fiber reinforced plastic.
3.2 heat tempered glass
heat tempered glass is an amorphous inorganic non-metallic material, generally made of a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) of. Its main components are silica and other oxides. The chemical composition of ordinary heat tempered glass is Na2SiO3, CaSiO3, SiO2 or Na2O·CaO·6SiO2, etc. The main component is silicate double salt, which is an amorphous solid with random structure. It is widely used in buildings to block wind and light, and belongs to a mixture. There are also colored heat tempered glass mixed with oxides or salts of certain metals to show color, and tempered heat tempered glass obtained by physical or chemical methods. Transparent plastics such as polymethyl methacrylate are sometimes referred to as glazed tempered glass for agricultural production systems.
Semi-tempered glazed tempered glass belongs to the encyclopedia name of semi-tempered glazed tempered glass in the decoration industry. The semi-tempered glazed tempered glass entry is composed of introduction, use, difference, technical standard, etc. The specific content of the semi-tempered glazed tempered glass will be organized and released by the decoration network together. The details are as follows:
Contents Introduction Purpose Difference
Semi-tempered glazed tempered glass is a type between ordinary flat glazed tempered glass and tempered glazed tempered glass. It has some advantages of tempered glazed tempered glass, such as higher strength than ordinary glazed tempered glass, while avoiding the poor flatness of tempered glazed tempered glass, which is easy to self-explode. Once damaged, the whole Unsatisfactory weaknesses such as crushing. When the semi-tempered thick tempered glass is damaged, it will crack radially along the crack source, and generally there is no tangential crack propagation, so it can still maintain the whole without slumping after damage.
Semi-tempered thick tempered glass is suitable for curtain walls and exterior windows in buildings, and can be made into tempered coated thick tempered glass, which has better image distortion than tempered thick tempered glass. However, it should be noted that semi-tempered thick tempered glass does not belong to the scope of safety thick tempered glass, because once it is broken, there are still sharp fragments that may hurt people, so it cannot be used for skylights and occasions where human body impact may occur. The surface compressive stress of semi-tempered thick tempered glass is between 24MPa and 52MPa, and the surface pressure of tempered thick tempered glass should be greater than 69MPa. The production process of semi-tempered thick tempered glass is the same as that of tempered thick tempered glass, only the wind pressure at the quenching station is different, and the cooling energy is smaller than that of tempered thick tempered glass. The "Administrative Regulations on Building Safety Glass" clearly states that 'single-piece semi-tempered glass (heat-enhanced glass) does not belong to safety glass', because once broken, it will form large fragments and radial cracks, although most of the fragments do not have sharp sharp corners, However, it will still hurt people and cannot be used in sunroofs and occasions where human impact may occur.
Different from tempered glass Semi-tempered glass is annealed glass through high temperature and quenching, the surface layer forms a compressive stress lower than 69 MPa, which increases the mechanical strength of the glass several times, that is, semi-tempered glass. The surface stress of semi-tempered glass is 24-69 Mpa. After being broken, it is the same as ordinary glass, and the product is characterized in that the strength of semi-tempered glass is more than 2 times that of annealed glass. Safety: When broken, the fragments are radial, and each fragment extends to the edge, which is not easy to fall off and is relatively safe, but it does not belong to safety glass. Deflection: The disturbance of semi-tempered glass is smaller than that of tempered glass and larger than that of annealed glass. Thermal stability: The thermal stability is also significantly better than that of annealed glass, and the temperature difference that ordinary glass can withstand after semi-tempering is about 75°C. Semi-tempered glass will not explode. Tempered glass is annealed glass through high temperature and quenching, and a strong compressive stress is formed on the surface layer, which increases the mechanical strength of the glass several times, that is, tempered glass. The surface stress of tempered glass is 69-168 Mpa. It is characterized by broken small obtuse-angle particles, which will not cause major harm to the human body. The strength is 4 times and above that of ordinary glass. It has good thermal stability, and the temperature difference that ordinary glass can withstand after tempering is about 180°C. The disadvantage of tempered glass is that it is easy to explode.
The surface compressive stress of semi-tempered glass is between 24MPa and 52MPa, and the surface pressure of tempered glass should be greater than 69MPa. The production process of semi-tempered glass is the same as that of tempered glass, only the wind pressure at the quenching station is different, and the cooling energy is smaller than that of tempered glass.