This standard specifies the dimensions and deviations, appearance quality, curvature and performance requirements of tempered glass and semi-tempered glass for curtain walls. It is applicable to flat tempered and semi-tempered glass products made of float glass. If it is compounded with other materials, the processed products such as interlayer, hollow or coated should also meet the standard requirements of the corresponding products. This standard does not specify curved products. GB 17841-1999 Tempered glass and semi-tempered glass for curtain walls GB17841-1999 Standard download decompression password: www.bzxz.net

GB17841—1999
The technical content of this standard is not equivalent to the Japanese industrial technical standard JISR3222:1990 "Double-strength glass", and refers to the American ASTMC1048:1992 "Heat-treated flat glass-HS, FT coated and uncoated glass" and the European Union draft standard CEN/TC129/WGZ/N76E:1993 "Heat-strengthened glass". This standard is applicable to curtain wall flat tempered glass and semi-tempered glass, and stipulates 7 items including size and deviation, appearance quality, curvature, surface stress, bullet bag impact performance, heat shock resistance and wind pressure resistance. Among them, the surface stress is compiled with reference to ASTMC1048, the bullet bag impact performance is compiled with reference to GB/T9963—1998 "Tempered Glass", and the heat shock resistance is compiled with reference to CEN/TC129/WGZ/N76E.
This standard is proposed by the State Bureau of Building Materials Industry. This standard is under the jurisdiction of the Glass Science Research Institute of China Building Materials Science Research Institute. Drafting unit of this standard: Glass Science Research Institute of China Building Materials Science Research Institute. Participating drafting units: Shenzhen Nanxing Glass Company of CSG Group, Zhuhai Xingye Safety Glass Co., Ltd., Qinhuangdao Industrial Technology Glass Factory of China Yaohua Glass Group. bzxZ.net
Main drafters of this standard: Yang Jianjun, Shi Xinyong, Mo Jiao, Wang Wenbiao, Wang Yingzhou, Wu Cunhao. 463
1 Scope
National Standard of the People's Republic of China
Tempered and heat-strengthened glass used in curtain walls
Tempered and heat-strengthened glass used in curtain wallsGB17841-- 1999
This standard specifies the size and deviation, appearance quality, curvature and performance requirements of tempered glass and heat-strengthened glass used in curtain walls. Applicable to flat tempered and heat-strengthened glass products made of float glass. If it is compounded with other materials, its reprocessed products such as sandwich, hollow or coated, the final product should also meet the standard requirements of the corresponding products. This standard does not make provisions for curved products.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1216-1985 Outside micrometer (neqISO3611:1978) GB/T9963—1998 Tempered glass (eqVJISR3206:1989) GB11614—1999 Float glass
JC/T 632--1996
Terms for automotive safety glass
JC/T 677--1997
3 Definitions
Test method for uniform static load simulated wind pressure of architectural glass This standard adopts the following definitions.
Semi-tempered glass: After heat treatment, the strength of the glass is 1 to 2 times higher than that of ordinary glass, and the heat shock resistance is significantly improved. Once broken, the state of the fragments is similar to that of ordinary glass.
Other relevant definitions are in accordance with JC/T632.
4 Types
4.1 Tempered glass for curtain wall
4.1.1 Tempered glass produced by horizontal method.
4.1.2 Tempered glass produced by vertical method.
4.2 Semi-tempered glass for curtain wall
4.2.1 Semi-tempered glass produced by horizontal method. 4.2.2 Semi-tempered glass produced by vertical method. 5 Requirements
Different types of products shall meet the requirements of the corresponding technical terms in Table 1. Approved by the State Administration of Quality and Technical Supervision on September 1, 1999 164
Implementation on August 1, 2000
Test Items
Dimensions and tolerances
Appearance quality
Bending
Surface stress
Ballistic impact performance
Heat shock resistance
Wind pressure resistance
5.1 Dimensions and deviations
5.1.1 Nominal thickness and thickness deviation
GB 17841--1999
Table 1 Technical conditions and corresponding test method clauses Tempered glass
Semi-tempered glass
The nominal thickness and deviation of tempered glass or semi-tempered glass products shall meet the requirements of Table 2. Table 2 Nominal thickness and deviation
Nominal thickness
Note: The thickness difference of the same piece of glass shall not exceed 0.20 mm. 5.1.2 Dimension deviation
Tempered glass
Semi-tempered glass
For rectangular tempered glass or semi-tempered glass products, the dimensional deviation shall comply with the relevant provisions of Table 3; for tempered glass or semi-tempered glass products with a side length greater than 3000mm and irregular shapes, the dimensional deviation may be agreed upon by the supply and demand parties. Table 3 Dimension deviation
Dimension deviation
Nominal thickness
5.1.3 Diagonal difference
L≤1000
Side length
1 000
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