GB/T 11944-2012 English PDF (GBT11944-2012)

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GB/T 11944-2012: Insulating glass unit
GB/T 11944-2012
ICS 81.040
Q 33
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 11944-2002
Insulating glass unit
中空玻璃
ISSUED ON. DECEMBER 31, 2012
IMPLEMENTED ON. SEPTEMBER 1, 2013
Issued by.
General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Classification ... 6
5 Material ... 6
6 Requirements ... 6
7 Test methods ... 9
8 Inspection rules ... 19
9 Packaging, marks, transportation and storage... 21
Annex A ... 23
Annex B ... 24
Annex C ... 27
Annex D ... 29
Annex E ... 34
Foreword
This Standard is drafted according to the rules specified in GB/T 1.1-2009.
Compared with GB/T 11944-2002, in addition to editorial changes, the main technical changes of
this Standard are as follows.
— DELETE the requirements of insulating glass unit specification (See the Version 4 in 2002);
— ADD requirements on dislocation (See 6.1.4);
— Thickness of sealant layer is changed into width of sealant layer, and requirements are
modified (See 6.1.5, the Version 5.2.4 in 2002);
— MODIFY the appearance requirements of insulating glass unit (See 6.2, the Version 5.3 in
2002);
— DELETE the sealing performance requirements (See the Version 5.4 in 2002);
— DELETE the durability of climate cycle (See the Version 5.7 in 2002);
— DELETE the requirements on durability of high temperature and humidity (See the Version 5.8
in 2002);
— ADD the requirements on durability of water vapor seal (See 6.5);
— ADD requirements on initial gas content of inflatable insulating glass unit (See 6.6);
— ADD requirements on the gas seal durability of inflatable insulating glass unit (See 6.7);
— ADD requirements on Value 17 (See 6.8);
— MODIFY the test method of dew point (See 7.3, the Version 6.4 in 2002);
— ADD description about failure cause and service life of insulating glass unit (See Annex A);
— ADD methods for testing edge sealing bond performance (See Annex B);
— ADD methods for testing water vapor permeability of edge sealing material (See Annex C);
— ADD methods for testing moisture content in drying agent (See Annex D);
— ADD description about optical phenomenon and visual quality of insulating glass unit (See
Annex E);
This Standard adopts the redrafting method and is prepared with reference to EN1279.2002
Insulating glass unit for Building. Of which the degree of consistency is not equivalent to this
Standard.
This Standard was proposed by China Building Material Council.
This Standard is administered by the National Architectural Glass Standardization Technical
Committee (SAC/TC 255).
The organizations responsible for drafting this Standard are. Qinhuangdao Glass Industry
Research and Design Institute, National Glass Quality Supervision and Inspection Center, and
China Building Material Test and Certification Center.
The organizations participating in drafting this Standard are. Shanghai Yaohua Pilkington Glass
Co., Ltd., Dow Corning (China) Investment Co., Ltd., CSG Holding Co., Ltd., Hangzhou Zhijiang
Silicone Chemicals Co., Ltd., Xinyi Glass Holdings Co., Ltd., Zhengzhou Zhongyuan Applied
Technology Research and Development Co., Ltd., Zhengzhou Fulong New Materials Technology
Co., Ltd., Wuxi Saili Molecular Sieve Co., Ltd., Chengdu Guibao Science and Technology Co.,
Ltd., Guangzhou Baiyun Chemical Industry Co., Ltd., CHAC Technology Co., Ltd., and Dongying
Shengming Glass Co., Ltd.
The main drafters of this Standard are. Ji Shuwei, Liu Zhifu, Li Yong, Wang Lixiang, Dong
Fenglong, Li Xiaojie, Shi Xinyong, Wang Tiehua, Wang Wenkai, Liu Ming, Sun Dahai, Xu Wuyi, Li
Buchun, and Li Xinda.
The previous versions replaced by this Standard are as follows.
— GB 7020-1986;
— GB 11944-1989;
— GB/T 11944-2002.
Insulating glass unit
1 Scope
This Standard specifies the terms, definitions, classification, requirements, test methods,
inspection rules. Packaging, marks, transportation and storage of Insulating glass unit.
This Standard applies to the insulating glass unit used for cold storage, decoration and
transportation in the field of building and other fields, and can be taken as reference by the
insulating glass unit used for other purposes.
2 Normative references
The articles contained in the following documents have become part of this Standard when they
are quoted herein. For the dated documents so quoted, all the modifications (Including all
corrections) or revisions made thereafter shall be applicable to this Standard.
GB/T 1216 External micrometer
GB/T 8170 Rules of rounding off for numerical values and 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
The following terms and definitions are applicable to this document.
3.1
Insulating glass unit
2 or more sheets of glass are separated with effective support and are bond-sealed at edges, thus
it becomes the glass product with dry gas space in between the glass layers.
Note. quality of various materials for producing insulating glass unit is closely related to the service life
of insulating glass unit; therefore, the material required in standard specification shall be used in
insulating glass unit production, and generally its service life shall not less than 15 years, see Annex A.
4 Classification
4.1 Classified according to the shape
Flat insulating glass;
Curved surface insulating glass.
4.2 Classified according to the gas inside the hollow cavity
Ordinary insulating glass unit. the insulating glass unit with air in the hollow cavity;
Inflatable insulating glass unit. the insulating glass unit with argon, krypton and other gases in the
hollow cavity.
5 Material
5.1 Glass
The sheet glass, coated glass, laminated glass, toughened glass, fire-resistant glass,
semi-toughened glass, figured glass and other glasses can be adopted. The glass used shall be
in compliance with the corresponding standard requirements.
5.2 Edge sealing materials
The edge sealing materials for insulating glass unit shall comply with the corresponding standard
requirement, and shall be able to realize the water vapor and gas seal performance of insulating
glass unit and keep the insulating glass unit structure stable. Sealant bond performance and
water vapor permeability of edge sealing materials are shown in Annex B and C.
5.3 Spacing materials
Spacing materials can be aluminum spacing strip, stainless steel spacing strip, composite spacing
strip, composite gaskets, etc., and shall conform to the requirements of relevant standards and
technical documents.
5.4 Desiccant
Desiccant shall be in compliance with the requirements of relevant standards.
6 Requirements
The performance and test methods of insulating glass unit shall comply with the provisions of the
corresponding terms in Table 1.
than 15mm. Damage during the test is allowed to occur to 1 sample, and replace the spare
sample to retest. First carry out 28 high-low temperature cycle tests according to test method for
stage 1 specified under 7.5.2, then carry out constant temperature and humidity test for 4 weeks
according to the test method for stage 2. After test, place the sampl...