WHY THE HEAT-SOAK-TEST

The unavoidable inclusion of nickel sulphide in a glass panel will
increase in volume due to an increase of temperature. Thus, the
tension balance of toughened glass panels is disturbed. This tension
change is the cause of spontaneous breakage.

To largely avoid spontaneous breakage in the fitted state, toughened safety glass can
undergo a heat-soak (HS) test. The HS test is recommended for each application, but is
generally not included. The heat-soak test is in accordance with EN 14179 or building
standard lists A.

The test is carried out by heating the glass panel and intentionally causing spontaneous
breakage. A certified heat-soak oven (SECURMART ESGH-H) exposes every part of the
glass to a temperature of 290˚ ± 10˚C for an exposure time of at least 4 hours and is in
accordance with the EN 14179-1 requirements and the special provisions of the building
standards list A (BRL-A).

Technical Data

Glass thickness: 4 bis 19 mm
Maximum mass: 2440 x 5100 mm
Minimum mass: 100 x 250 mm

Identification