GB 15763.4-2009 English PDF (GB15763.4-2009)

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GB 15763.4-2009: Safety glazing materials in building -- Part 4: Heat soaked thermally tempered glass
GB 15763.4-2009
ICS 81.040.20
Q 33
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Safety glazing materials in building -
Part 4. Heat soaked thermally tempered glass
ISSUED ON. MARCH 28, 2009
IMPLEMENTED ON. MARCH 01, 2010
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration Committee of the People’s
Republic of China
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and definitions ... 6
4 General principle ... 7
5 Requirements ... 7
6 Test methods ... 9
7 Inspection rules ... 10
8 Marking ... 13
9 Packaging, transportation and storage ... 13
Annex A (Normative) Heat soak process cycle and system ... 14
Annex B (Normative) Bending strength test method ... 18
Annex C (Informative) Heat soak process system calibration test ... 21
Foreword
Article 5.5, 5.6 and 5.7 in this Part are mandatory, the rest are recommendatory.
GB 15763 Safety glazing materials in building consists of four parts.
— Part 1. Fire-resistant glass;
— Part 2. Tempered glass;
— Part 3. Laminated glass;
— Part 4. Heat soaked thermally tempered glass.
This is part 4 of GB 15763.
This Part is not equivalent to EN 14179-1. 2005 Glass in building - Heat soaked thermally
toughened soda lime silicate safety glass - Part 1. Definition and description.
Annex A and Annex B of this Standard are normative; Annex C is informative.
This Standard was proposed by China Building Materials Federation.
This Standard shall be under the jurisdiction of National Technical Committee on Glass in
Building of Standardization Administration of China.
The responsible drafting organization is China Building Material Test and Certification
Center.
The participate drafting organizations are Guangdong Golden Glass Technologies Ltd,
Zhejiang Hehe Holding Group Co., Ltd, CSG Holding Co., Ltd, Shanghai Yaohua
Pilkington Glass Group Co., Ltd, Jiangsu Xiuqiang Glasswork Co., Ltd, Shenzhen Sanxin
Special Glass Technology Co., Ltd, Beijing Wuhua Tianbao Glass Co., Ltd, Zhejiang
Zhongli Holding Group., Ltd, Jiangmen Yinhui Safety Glass Co., Ltd, Shenzhen Handong
Glass Machinery Co., Ltd, and Wuxi Dayang Glass Decoration Engineering Co., Ltd.
The chief drafting staffs of this standard. Wang Rui, Shi Xinyong, Chen Lu, Xiao Pengjun,
Xia Weiwen, Ai Fazhi, Sun Dahai, Zhou Jian, Wu Congzhen, Long Linxing, Lyu Hao, Chen
Xinsheng, Yang Hongbin, Sheng Songjun, He Changdu, Wang Wenbiao, Sui Chaoying,
Wang Jingjing, and Zhang Jianhua.
This Part is issued for the first time.
Introduction
After heat treatment, ordinary annealed glass becomes tempered glass; a compressive
stress layer is formed on the glass surface, which improves the mechanical strength and
heat-resisting impact strength of glass; and it has special characteristics of fragment.
Tempered glass as a kind of safety glass is widely used in building and other fields.
In China, there is a large amount of tempered glass used in building walls every year.
However, spontaneous explosion of tempered glass has greatly limited its application.
After long-term tracking and study, it is found that the nickel sulfide (NiS) stone inside the
glass is the main cause of spontaneous explosion of tempered glass. Studies have shown
that homogenization of tempered glass (the second heat treatment process) can greatly
reduce the spontaneous explosion rate of tempered glass. However, improper
temperature control during the homogenization will cause reverse or incomplete phase
transition of NiS, and it will even lead to tempering stress relaxation, affecting the safety
performance of final product.
This standard is to.
a) Clearly specify the performance of heat soaked thermally tempered glass. Impact
resistance, fragment state and shot-bag impact performance involve the safe use of
products, they are the mandatory requirements. Other technical requirements can be
used for quality monitoring items for daily production.
b) Specify homogenization process and system to standardize the homogenization
process, and provide technical support for quality assurance of heat soaked thermally
tempered glass.
c) Based on the particularity of heat soaked thermally tempered glass products, this
Standard contains special provisions on the sampling methods of product type
inspection to ensure the authenticity and reliability of test samples.
Safety glazing materials in building -
Part 4. Heat soaked thermally tempered glass
1 Scope
This Part specifies the terms and definitions, general provisions, requirements, test
methods, inspection rules, marking, packaging, transportation and storage of heat soaked
thermally tempered glass for building.
This Part of GB15763 applies to heat soaked thermally tempered glass in building. For
those heat soaked thermally tempered glass not-used in building (e.g. industrial
equipment, furniture, etc.), this standard may be served as reference if there is no
corresponding product standard.
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
(excluding corrections) or revisions made thereafter shall not be applicable to this
Standard. For the undated documents so quoted, the latest editions shall be applicable to
this Standard.
GB 15763.2 Safety glazing materials in building - Part 2. Tempered glass
3 Terms and definitions
For the purpose of this Part, following terms and definitions apply.
3.1
heat soaked thermally tempered glass
It refers to the soda-lime-silica tempered (HST) glass after treatment under specific
process conditions.
5.2 Thickness and permissible deviation
It shall be in accordance with those specified in GB 15763.2.
5.3 Appearance quality
It shall be in accordance with those specified in GB 15763.2.
5.4 Bending
For heat soaked thermally tempered glass with flat type, it shall be in accordance with
those specified in GB 15763.2.
5.5 Impact resistance
It shall be in accordance with those specified in GB 15763.2.
5.6 Fragment state
It shall be in accordance with those specified in GB 15763.2.
5.7 Impact property of shot-bag
It shall be in accordance with those specified in GB 15763.2.
5.8 Surface stress
It shall be in accordance with those specified in GB 15763.2.
5.9 Heat shock resistance
It shall be in accordance with those specified in GB 15763.2.
5.10 Bending strength (four-point bending method)
With 95% confidence interval and 5% probability of damage, the bending stress of heat
soaked thermally tempered glass shall meet the requirements in Table 2.
6.6 Impact resistance test
It shall be in accordance with those specified in GB 15763.2.
6.7 Fragment state test
It shall be in accordance with those specified in GB 15763.2.
6.8 Impact property test of shot-bag
It shall be in accordance with those specified in GB 15763.2.
6.9 Measurement of surface stress
It shall be in accordance with those specified in GB 15763.2.
6.10 Heat shock resistance performance
It shall be in accordance with those specified in GB 15763.2.
6.11 Bending strength (Four-point bending)
Testing according to annex B, and calculating the bending strength.
7 Inspection rules
7.1 Inspection items
The inspection is classified int...