Heat strengthened glass is produced by a similar process as tempered
glass but with a different cooling pattern. The glass is thermally
brought to the softening point and then cooled in steps and not rapidly
as in case of tempered glass. This gives the glass higher mechanical and
thermal strength than annealed glass but less than fully tempered glass.
However, it is less vulnerable to spontaneous breakage as in
case of Tempered glass. However it breaks almost like an annealed glass
and can not be used as a safety glass.
Ultra HS glass
BS ultra HS glass are 2 to 3 times as strong as annealed glass and can withstand temperature up to 290 degree Celsius. It however breaks into large fragments almost like annealed glass and can cause serious injuries if not handled properly and hence can not be
used as a safety glass. However it gives sufficient warning time before breaking and has at most negligible chances of spontaneous breakage.
BS Ultra HS glass is having less optical distortion and can be preferred over tempered glasses where fragility and distortion are a concern. These glass are tested to meet international standards as per BS 6202, AS 2208. ASTMC 1048.
Applications for BS Ultra HS
High rise buildings
Insulating glass panels
Windows and structural glazing
Laminated glass panels
Precautions and Handling of BS
Ultra HS Glass
# Handling and precautions to be taken are more or less similar to fully tempered glass.
# Holes can not be drilled neither can be BS Ultra HS glass cut.
# Premature failures can occur if edges are grinded or sand blasting carried out.
# Should be handled and installed very carefully because it is not a safety glass and can cause serious injuries.
# Fracturing of glass takes place into large pieces and may stick to its position and hence should be carefully dismantled.