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JC/T 977-2005

Chinese Standard: 'JC/T 977-2005'
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JC/T 977-2005
JC
BUILDING MATERIALS INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 81.040.20
Q 33
Record No.. 15249-2005
Chemically strengthened glass
化学钢化玻璃
ISSUED ON. FEBRUARY 14, 2005
IMPLEMENTED ON. JULY 1, 2005
Issued by. National Development and Reform Commission
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Classification and marks... 5 
5 Technical requirements ... 5 
6 Test methods ... 11 
7 Inspection rules ... 15 
8 Package, marks, transport and storage ... 17 
Appendix A ... 18 
Appendix B ... 21 
Foreword
This Standard was modified on the basis of European standard EN 12337-
1.2000 Glass in Building - Chemically Strengthened Soda Lime Silicate Glass
- Part 1. Definition and Description.
Compared with EN 12337-1.2000, the main technical differences are as follows.
- Deleted measurement method for squareness of planar rectangular
products; added requirements for diagonal difference;
- Added requirements and measurement methods for surface stress and
compressive stress layer depth by referring to ASTM C1422-99 Standard
Specification for Chemically Strengthened Flat Glass.
Appendix A of this Standard is normative. Appendix B is informative.
This Standard was proposed by China Building Materials Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee
on Building Glass of Standardization Administration of China.
Main drafting organization of this Standard. Glass Science Institute of China
Building Materials Academy.
Drafting organizations of this Standard. China Southern Glass Technology
Holdings (Group) Co., Ltd., Beijing Gelin Jingfeng Fireproof Glass Co., Ltd..
Main drafters of this Standard. Yang Jianjun, Wang Rui, Gong Shuyi, Zhang
Baojun, Xiong Wei, Song Li, Shi Xinyong, Mo Jiao, Wu Huiting, Hu Yue.
This Standard was issued for the first time.
Chemically strengthened glass
1 Scope
This Standard specifies the term and definition, classification and marks,
technical requirements, test methods, inspection rules, package, marks,
transport and storage of chemically strengthened glass.
This Standard is applicable to flat chemically strengthened glass.
2 Normative references
The following standards contain the provisions which, through reference in this
Standard, constitute the provisions of this Standard. For dated references,
subsequent amendments (excluding corrections) or revisions do not apply to
this Standard. However, the parties who enter into agreement based on this
Standard are encouraged to investigate whether the latest versions of these
documents are applicable. For undated reference documents, the latest
versions apply to this Standard.
GB/T 1216 Micrometers
GB/T 5137.1-2002 Test Methods of Safety Glazing Materials Used on Road
Vehicle
GB 11614-1999 Float glass
GB/T 18144 Test method for measurement of stress in glass
JB/T 8788 Feeler gauges
3 Terms and definitions
The following terms and definitions apply to this document.
Chemically strengthened glass
Glass of which alkali metal ions of glass surface are replaced by other alkali
metal ions in molten salt, so as to improve mechanical strength.
Stain trace,
smog
There shall be no obvious stain trace, smog on the surface of chemically
tempered glass.
5.6 Edge and hole machining quality
5.6.1 Edge machining quality of chemically tempered glass
The edge of chemically tempered glass used in construction shall be chamfered
and fine grinded. The edge quality of chemically tempered glass used for non-
construction shall be determined by the seller and the buyer.
5.6.2 Hole edge machining quality
Hole edge machining quality shall be determined by the seller and the buyer.
5.6.2.1 The tolerance of hole aperture of chemically tempered glass products
used for construction shall comply with provisions of Table 6. This provision only
applies to the glass of which nominal thickness is not less than 4 mm. The
tolerance of hole aperture of chemically tempered glass used for non-
construction shall be determined by the seller and the buyer.
Table 6 Hole aperture and its tolerance unit. mm
Nominal hole aperture (D) Tolerance
D<4 Determined by the seller and the buyer
4≤D≤20 ±1.0
20D>100 Determined by the seller and ......
Related standard:   JC/T 979-2005  JC/T 511-2002
   
 
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