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GB/T 39797-2021 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39797-2021: Test method for surface tension of glass melt - Sessile drop method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39797-2021	189	Add to Cart	3 days	Test method for surface tension of glass melt - Sessile drop method	Valid

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Basic data

Standard ID: GB/T 39797-2021 (GB/T39797-2021)
Description (Translated English): Test method for surface tension of glass melt - Sessile drop method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Q34
Word Count Estimation: 10,141
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39797-2021: Test method for surface tension of glass melt - Sessile drop method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Test method for surface tension of glass melt - Sessile drop method ICS 81.040.01 Q34 National Standards of People's Republic of China Test method for surface tension of molten glass Released on 2021-03-09 2021-10-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

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). Drafting organizations of this standard. Beijing University of Technology, Xiamen Metrological Verification and Testing Institute, Huzhou Tianshi Glass Products Co., Ltd., Rainbow Display Parts Co., Ltd., Bengbu Product Quality Supervision and Inspection Institute, Huzhou Jinnuogna Weibao Fireproof Door and Window Co., Ltd., Hebei CSG Glass Co., Ltd., China Building Materials Inspection and Certification Group Co., Ltd., Henan Yuke Optical Technology Co., Ltd., Dongguan Yintaifeng Optics Technology Co., Ltd., Jiangxi Voge Optoelectronics Co., Ltd., Guizhou Building Material Product Quality Inspection and Testing Institute, Shandong Lehejia Commodity Co., Ltd. Company, Suzhou Xinwu Optoelectronics Technology Co., Ltd., Henan Ancai Hi-Tech Co., Ltd., Dezhou Andun Electronics Co., Ltd., Beijing Xuhui Xinrui Technology Co., Ltd. The main drafters of this standard. Li Miao, Jiang Shulian, Tian Yingliang, Song Weirong, Zhang Kun, Zhao Xingyong, Wu Linyu, Wang Wei, Wang Changjun, Li Junjie, Jing Zhijie, Zhang Xun, Tang Zhangang, Yang Huiliang, Xu Zhengben, Kang Pinchun, Wang Jianjun, Li Na, Lu Ting, Li Hongliang, Zhao Zhiyong, Zhang Yusheng, Peng Shiyong, Cang Limin, Liu Haiyan, Lun Xiaoyu, Liu Yaru, Huang Bowen. Test method for surface tension of molten glass

1 Scope

This standard specifies the measurement principles, instruments and equipment, samples, tests, calculation and presentation of results, and tests for measuring the surface tension of glass melts. report. This standard applies to the sessile drop method to measure the surface tension of glass melts.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. GB/T 1598 platinum rhodium 10-platinum thermocouple wire, platinum rhodium 13-platinum thermocouple wire, platinum rhodium 30-platinum rhodium 6 thermocouple wire GB/T 11446.1 electronic grade water GB/T 21389 Vernier, belt meter and digital caliper GB/T 26497 electronic balance GB/T 30071 Fine-grained high-density special graphite products GB/T 32201 gas flow meter YY/T 0686 Medical tweezers

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Glassmelt Glass that exhibits liquid characteristics above its softening point temperature. 3.2 Surfacetension The force per unit length at the tangent of the melt (liquid) and gas interface. 3.3 Sessiledropmethod A method for measuring surface tension based on the shape parameters of the melt (liquid) forming stable ellipsoidal droplets on the surface of the horizontal pallet. 3.4 Calibrationcolumn Smooth cylinder for image pixel size calibration.

4 Measuring principle

The surface tension of the glass melt is measured based on the sessile drop method. The glass melt is rotated by the combined action of gravity and surface tension on the horizontal pallet. Axisymmetric ellipsoid (see Figure 1), the relationship between the pressure difference at any point on the surface of the ellipsoid and the surface tension is shown in equation (1). ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39797-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39797-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 39797-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39797-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.