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GB/T 37991-2019: Measuring method for ultra-thin glass reheating line shrinkage - Dilatometer method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 37991-2019 | English | 119 |
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Measuring method for ultra-thin glass reheating line shrinkage - Dilatometer method
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GB/T 37991-2019
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Basic data | Standard ID | GB/T 37991-2019 (GB/T37991-2019) | | Description (Translated English) | Measuring method for ultra-thin glass reheating line shrinkage - Dilatometer method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q34 | | Classification of International Standard | 81.040.30 | | Word Count Estimation | 6,699 | | Date of Issue | 2019-08-30 | | Date of Implementation | 2020-07-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 37991-2019: Measuring method for ultra-thin glass reheating line shrinkage - Dilatometer method
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Measuring method for ultra-thin glass reheating line shrinkage - Dilatometer method
ICS 81.040.30
Q34
National Standards of People's Republic of China
Ultra-thin glass reheat line shrinkage test method
Dilatometer
Published on.2019-08-30
2020-07-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Building Materials Federation.
This standard is under the jurisdiction of the National Industrial Glass and Special Glass Standardization Technical Committee (SAC/TC447).
This standard was drafted. Hainan Zhonghang Special Glass Materials Co., Ltd., Hainan Zhonghang Special Glass Technology Co., Ltd., China Building Materials Inspection and Certification
Group Co., Ltd.
The main drafters of this standard. Pan Guozhi, Zhao Huifeng, Jiang Hong, Lu Wei, Du Dayan, Li Na, He Jianxiong, Zhou Li, Huang Xiaoye.
Ultra-thin glass reheat line shrinkage test method
Dilatometer
1 Scope
This standard specifies the terms and definitions, test principles, test devices and conditions for testing the shrinkage rate of ultra-thin glass reheating line by the dilatometer method.
Samples, test procedures, results calculations, test reports, etc.
This standard is applicable to the test of the shrinkage rate of ultra-thin glass reheating line with thickness of 0.4mm~1.1mm, and the reheating line of other thickness flat glass
The test for shrinkage can be referred to this standard.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 15764 flat glass terminology
3 Terms and definitions
The following terms and definitions as defined in GB/T 15764 apply to this document.
3.1
Reheat line shrinkage rate reheatinglineshrinkage
The ultra-thin glass product is heated again to a specific temperature for a certain period of time, and after cooling to room temperature for a certain period of time, the amount of shrinkage in the length direction is the same as the original length.
The ratio of degrees.
4 Test principle
The glass sample is cooled by reheating, that is, it is heated to a specific temperature at a set heating rate from room temperature, and then kept for a while, and then kept for a while.
When the set cooling rate is lowered to room temperature, the original length Li shrinks relative to before heating. Measuring the length of the glass with a thermal dilatometer
The amount of shrinkage ΔLi, the ratio of the amount of shrinkage to the original length, is the reheat line shrinkage of the glass sample, as shown in FIG.
Description.
Li --- original length of the sample;
ΔLi—the amount of shrinkage after reheating of the sample.
Fig.1 Schematic diagram of length change after reheating of glass sample
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