Tempered Building Glass

Tempered Building Glass

Toughened or Tempered glass is one kind of safety glass. It is processed by heat strengthening processing and a compressive stress layer is formed on the surface of glass, which has good mechanical properties and capacity of thermal resistance and impact resistance.

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Heat-Treated Glass

Heat-treating for safety and durability

Many of the world’s most dramatic, visually breathtaking buildings involve large expanses of glass. But these architectural masterpieces often require that the glass be heat-treated to provide durability and/or safety. There are two processes for heat-treating glass: heat-strengthening and tempering. Both processes take place on the same processing equipment and involve heating the glass to approximately 1200 degrees, then force-cooling it to create surface and edge compression. Which process is required depends on the specific application of the glass.

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Tempered glass

Tempered glass, which also may be called safety glazing, is typically specified to provide security or to keep occupants safe wherever there is the potential for broken glass to hurt people if it becomes a projectile, such as in a fire, explosion, tornado or hurricane. It must be used in patio doors, entrance doors, side lites and other hazardous locations. When shattered, tempered glass breaks into thousands of small particles.  

To make tempered glass, the glass is reheated to just below the melting point but air-cooled (quenched) quickly, which creates higher surface compression and/or edge compression in the glass. Tempering makes the glass four to five times stronger and safer than annealed or untreated glass. As a result, tempered glass is less likely to experience a thermal break.

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