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GB/T 18915.1-2013 English PDF (GBT18915.1-2013)

GB/T 18915.1-2013 English PDF (GBT18915.1-2013)

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GB/T 18915.1-2013: Coated glass -- Part 1: Solar control coated glass

This Part specifies the terms and definitions, product classification, requirements, test methods, inspection rules and packaging, mark, storage, and transportation of solar control coated glass. This Part applies to architectural solar control coated glass. Solar control coated glass of other applications can refer to this Part.
GB/T 18915.1-2013
GB
ICS81.040.20
Q33
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing GB/T 18915.1-2002
Coated glass ?€? Part 1. Solar control coated glass
ISSUED ON. DECEMBER 31, 2013
IMPLEMENTED ON. SEPTEMBER 1, 2014
Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration Committee of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Product classification ... 7
5 Requirements ... 7
6 Test methods ... 10
7 Inspection rules ... 16
8 Packaging, mark, storage and transportation ... 18
Foreword
This Standard is drafted according to the rules specified in GB/T 1.1-2009. GB/T 18915 Coated Glass is divided into two parts.
- Part 1. Solar control coated glass;
- Part 2. Low emissivity coated glass.
This Part is Part 1 of GB/T 18915 Coated Glass.
This Part replaces GB/T 18915.1-2002 Coated Glass Part 1. Solar Control Coated Glass.
Compared with GB/T 18915.1-2002, this Part has been revised mainly as follows. - Add and modify the definitions of coated glass, solar control coated glass, pinhole, spot, stain and dark strip in Terms and Definitions;
- Delete the definition of scratch in the Terms and Definitions;
- Delete the division of superior product and qualified product of solar control coated glass in the Product Classification;
- Add that the solar control coated glass is divided into offline solar control coated glass and online solar control coated glass, based on coating process;
- Add Table 1;
- Delete the edge processing requirements of tempered and semi-tempered solar control coated glass original coating;
- Modify the requirements of appearance quality;
- Modify the requirements of optical performance;
- Modify the requirements of color uniformity test, specimen size, and batch sampling method of chromatic aberration specimen;
- Modify the wear-scar measurement position of abrasive resistance test; - Modify the specimen size of acid resistance test and alkali resistance test. This Standard was proposed by China Building Materials Federation.
This Standard shall be centralized by the National Architectural Glass Standardization Technical Committee (SAC/TC 255).
Drafting organizations of this Standard. National Glass Quality Supervision and Inspection Center, and Qinhuangdao Glass Industry Research and Design Institute. The participating drafting organizations of this Standard. Weihai Blue Star Glass Holding Co., Ltd., CSG Holding Co., Ltd., and Grand Engineering Glass (Zhongshan) Co., Ltd.
The main drafters of this Standard. Huang Jianbin, Guan Shifeng, Liu Zhifu, Tan Xiaojian, Wei Defa, Wang Shuo, Li Jiangdong, Han Ying, and Qi Shumei.
The previous version replaced by this Part is.
- GB/T 18915.1-2002.
Coated glass - Part 1. Solar control coated glass
1 Scope
This Part specifies the terms and definitions, product classification, requirements, test methods, inspection rules and packaging, mark, storage, and transportation of solar control coated glass.
This Part applies to architectural solar control coated glass. Solar control coated glass of other applications can refer to this Part.
2 Normative??references
The articles contained in the following documents have become part of this Part 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 Part. GB/T 2680 Determination of light transmittance, solar direct transmittance, total solar energy transmittance and ultraviolet transmittance for glass in building and related glazing factors
GB/T 5137.1 Test methods of safety glazing materials used on road vehicles Part 1. mechanical properties tests
GB/T 6382.1 Flat glass container - Frame-type container and its test method GB/T 6382.2 Flat glass container - Box-type container and its test method GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB 11614 Flat glass
GB/T 11942 Colorimetric methods for colour building materials
GB 15763.2 Safety glazing materials in building - Part 2. Tempered glass GB/T 17841 Heat strengthened glass
JC/T 513 Flat glass packed in wooden cases
3 Terms??and??definitions
For the purpose of this Part, the following terms and definitions shall apply. 3.1
Coated glass
Through physical or chemical methods, one layer or multiply layers of metal, metallic compound or nonmetallic compound coatings are applied on the glass surface to meet special requirements of glass products.
3.2
Solar control coated glass
Through the coating-layer, the optical property is changed. It refers to the coated glass that has the selective reflection and absorptive action against the sunlight with wavelength range of 300nm-2500nm.
3.3
Pinhole
Observed from the coating surface of coated glass, it refers to the transparent dot-shape defects that are caused by glass not attached with coating-layer or coating-layer too thin.
3.4
Spot
Observed from the coating surface of coated glass, it refers to the dot-shape defects that are in darker color, compared with the overall coating-layer.
3.5
Stain
Observed from the glass surface of coated glass, it refers to the cloud-shape, radial-shape or strip-shape defects caused by uneven coating-layer or the color variation of coating-layer surface.
3.6
Dark stripe
Observed from the glass surface of coated glass, it refers to the strip-shape area of 5.5 Color uniformity
USE chromatic aberration ???Eab of CIELAB uniform color space to represent the color uniformity of solar control coated glass. The chromatic aberration shall be less than 2.5.
5.6 Abrasive resistance
The absolute value of visible light transmittance difference value of specimen before and after the test shall not be greater than 4%.
5.7 Acid resistance
The absolute value of visible light transmittance difference value of specimen before and after the test shall not be greater than 4%. The coating-layer change shall be uniform and the local coating is not allowed to fall-off.
5.8 Alkali resistance
The absolute value of visible light transmittance difference value of specimen before and after the test shall not be greater than 4%. The coating-layer change shall be uniform and the local coating is not allowed to fall-off.
6 Test??methods
6.1 Size deviation, thickness deviation and diagonal difference
MEASURE the size deviation, thickness deviation and diagonal difference according to the methods specified in GB 11614.
6.2 Determination of curvature
6.2.1 MEASURE the curvature of non-tempered solar control coated glass
according to the methods specified in GB 11614.
6.2.2 MEASURE the curvature of tempered and non-tempered solar control coated glass according to the methods specified in GB 15763.2.
6.3 Determination of the appearance quality
6.3.1 Determination of pinholes, spots and scratches
In an environment not affected by the ambient light, put the specimen vertically at the position 600 mm away from the screen. The screen is matt black screen, installed with several 40W fluorescents of which the spacing distance is 300 mm. The observer shall be 600 mm away from the specimen, to observe with his sight vertical to the specimen surface. It is shown in Figure 2.
6.7.1 Sampling methods
Randomly DRAW 3 pieces from the same batch of products. CUT out a total of 3 specimens of 100mmX100mm from the same position of each piece of products. For the tempered and semi-tempered solar control coated glass, due to unable cutting, it may produce the specimen with the as small as possible size according to the same process, total 3 specimens. If it cannot produce the specimen, it may randomly select 3 pieces of products, TAKE one corner of each product as the specimen.
6.7.2 Test procedures
6.7.2.1 Before the test, it shall use the anhydrous ethanol to clean both surfaces of the specimen. MEASURE the visible light transmittance of the specimen after natural drying.
6.7.2.2 USE a suitable container. IMMERSE the specimens in hydrochloric acid with concentration of 1mol/L. The specimens can be placed vertically, obliquely or horizontally with coating surface upwards in the container. The specimens shall not be stacked up together. The coats shall be in sufficient contact with the solution. MAINTAIN an ambient temperature of 23??C ?? 2??C. The immersion time is 24h. 6.7.2.3 Take out the specimen, after washing and natural drying, USE the same instrument to MEASURE the visible light transmittance after test, visually OBSERVE the changes of coating surfaces and MAKE records.
6.7.2.4 CALCULATE the absolute value of visible light transmittance difference value of specimen before and after the test.
6.8 Alkali resistance
6.8.1 Sampling methods
Randomly DRAW 3 pieces from the same batch of products. CUT out
100mmX10...

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