Heat Soak Testing
Fully tempered glass manufactured by PRESS GLASS ranks among the very top quality products. It complies with official standards regarding strength, fracture pattern, dimensions and tolerances as well as edge finish. Test results prove our product exceeds strength parameters stipulated in the standard. Nevertheless, this state-of-the-art product shows a certain weakness characteristic of float glass: tiny nickel sulfide crystals (NiS) which may occur in molten glass during float glass production process. When glass is heated during tempering, nickel sulfide impurities in the glass pane increase their volume. When the heated glass is rapidly quenched
How does the Heat Soak Testing work with tempered glass?
Understanding the mechanism of spontaneous nickel sulfide failures helped develop a method to eliminate panes likely to suffer breakage: Heat soaked fully tempered glass is heated up
Why should you ask for heat soaked fully tempered glass?
There is a growing tendency to require glass used for large projects be heat soak tested. Regulations have become more stringent and investors are more aware of the potential consequences caused by spontaneous fractures of already installed glazing systems. Fractured glass panes must be promptly replaced, a very costly procedure often calling for a lifting crane or other specialized equipment.
Press Glass has applied heat soak testing to the full range of our fully tempered glass products. We use a calibrated oven and process which meets requirements of EN-14179 standard.
The heating process for a heat soak testing does not impair the safety class or strength of fully tempered glass. Customers who order heat soak testing get high quality fully tempered glass checked for spontaneous fracturing caused by nickel sulfide inclusions.
|3/16” – 3/4” (5-19 mm)||236” x 126”||14,000 lb.||18” x 10”|