scope:

Specifies tolerances, flateness, edge work, fragmentation and physical and mechanical characteristics of flat thermally toughened borosilicate safety glass for use in buildings. Bent thermally toughened borosilicate safety glass is mentioned, but this product is not part of this standard. Thermally toughened borosilicate safety glass, defined hereafter can be incorporated into assemblies, e.g. laminated glass or insulating units, or undergo an additional treatment, e.g. coating, and shall therefore comply with the requirements of the appropriate finished product standard. Thermally toughened safety glass, in this case, will not loose its mechanical or thermal characteristics.