The two methods designated as Approach 1, which is intended for use in markets such as North America, and Approach 2, which is intended for use in markets such as Europe.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 20492-3: 2010 Glass in buildings—Insulating glass—Part 3: Gas concentration and gas leakage (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

Of the methods for testing the durability of edge seals by climate tests, the method intended for the use in the North American market is designated as Approach 1 and for the use in the European market as Approach 2 in this Standard.

This Standard is applicable to sealed, insulating glass units with one or two cavity layers, including insulating glass units with tubes connecting the cavity layers and the surrounding atmosphere for the purpose of equalizing pressure.

This Standard is not applicable to insulating glass units that contain a spandrel glass coating and does not apply to insulating glass units whose function is decorative only.

NOTE The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 20492-1: 2008 Glass in buildings-Insulating glass-Part 1: Durability of edge seals by climate tests (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

The tempered fire resistance glass constituting sealed insulating glass, laminated glass and laminated sealed insulating glass is also within the scope of this Standard.

NOTE: The tempered fire resistance glass is a glass manufactured to be suitable for fire protective purposes by the following process: The soda lime glass, used as a base material, is cut to the specified dimensions, given a special polishing around the edge, and then given a controlled thermal treatment to induce compressive stress on the glass surface, and the edge strength is increased so that its heat crack resistance is enhanced.

This Standard is not applicable to silvered glass mirror for external glazing applications.

Silvered glass mirror covered by this Standard is not intended for use in corrosive environments where high humidity or airborne corrosion promoters, or both, are consistently present.

NOTE: The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 25537 : 2008 Glass in building-Silverect flat-glass mirror (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISOIIEC Guide 21-1.