GB/T 4121-1983
Replaced
GB/T 39749-2021
Active
National standards
GB/T 39749-2021 Evaluation method and graduation for energy efficiency performance of insulating glass unit
GB/T 39749-2021 Evaluation method and graduation for energy efficiency performance of insulating glass unit
Basic Information
Standard Code:
GB/T 39749-2021
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Ceramics, glass
ICS Name:
\nGlass
Publish Date:
2021-03-09
Implement Date:
2022-02-01
Pages:
5 pages
Scope
This standard specifies the terms and definitions, evaluation methods, and grading of the thermal insulation performance of insulated glass.
This standard applies to single-cavity insulated glass, multi-cavity insulated glass, and vacuum composite insulated glass used in buildings.
Development Information
Referenced Standards
GB/T 2680-1994 Determination of light transmittance, solar direct transmittance, total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors
GB/T 2680-2021 Glass in building—Determination of light transmittance,solar direct transmittance,total solar energy transmittance,ultraviolet transmittance and related glazing factors
GB/T 11944-2002 Sealed insulating glass unit
GB/T 11944-2012 Insulating glass unit
JC/T 2304-2015 The technical specifications for insulating and heat-insulating glass used in construction
JGJ/T 151-2008 Calculation specification for thermal performance of windows,doors and glass curtain-walls
GB/T 11944-2025 Insulating glass unit
Related Standards
GB/T 4870-1985
Abolished
GB/T 4870-1985 Sheet glass dimension series
GB/T 5432-1985
Replaced
GB/T 5432-1985 The density of daily use glass—Test method
GB/T 5433-1985
Replaced
GB/T 5433-1985 The transmittance of daily use glass—Test method
GB/T 5949-1986
Replaced
GB/T 5949-1986 Test method of alveolus and gas line in transparent silica glass
GB/T 6581-1986
Replaced