GB/T 11944-2012 in English

《GB/T 11944-2012中空玻璃》由TC255（全国建筑用玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。

1 Scope

This standard specifies terms and definitions, classification, requirements, test methods, inspection rules, packaging, marking, transportation and storage of insulating glass unit.

It is applicable to insulating glass units in building and insulating glass units for refrigeration, decoration and transportation. It may be referenced by insulating glass units for other purposes.

2 Normative references

The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition of the normative document (including any amendments) applies.

GB/T 1216 External micrometer
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 22476 Calculation and determination of steady-state U values(thermal transmittance) of multiple glazing

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1

insulating glass unit

glass product formed by two or more panes of glasses that are evenly spaced apart with effective supports and bonded and sealed to each other at the edge, therefore a dry gas space exists between the glass layers

Note: The quality of various materials used for making insulating glass unit is closely related to the service life of insulating glass unit. The insulating glass units made of materials complying with standard and specification may be used for no less than 15 years generally, see Annex A.

Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Materials
6 Requirements
7 Test methods
8 Incolling diskspection rules
9 Packaging, marking, transportation and storage
Annex A (Informative) Failure cause and service life of insulating glass unit
Annex B (Informative) Edge seal bonding performance
Annex C (Informative) Moisture permeation rate of edge sealing material
Annex D (Normative) Determination of moisture content of desiccant
Annex E (Informative) Description of optical phenomena and visual quality of insulating glass unit