GB/T 8722-2019 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 8722-2019: Test method for thermal conductivity of carbon materials Status: Valid GB/T 8722: Historical versions
Basic dataStandard ID: GB/T 8722-2019 (GB/T8722-2019)Description (Translated English): Test method for thermal conductivity of carbon materials Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: Q51 Classification of International Standard: 29.050 Word Count Estimation: 10,126 Date of Issue: 2019-12-10 Date of Implementation: 2020-07-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 8722-2019: Test method for thermal conductivity of carbon materials---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.(Method for determining thermal conductivity of carbon materials) ICS 29.050 Q51 National Standards of People's Republic of China Replaces GB/T 8722-2008 Method for determining thermal conductivity of carbon materials 2019-12-10 release 2020-07-01 implementation State Administration of Market Supervision Published by the National Standardization Management Committee ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 8722-2008 "Method for determination of medium-temperature thermal conductivity of graphite materials". Ratio, the main technical content changes are as follows. --- Added terms and definitions (see Chapter 3); --- Increased the direction of longitudinal heat flow sample sampling (see 4.4.1); --- Modified the number of measurements of longitudinal heat flow test (see 4.5.6, 6.6 of the.2008 version); --- Added flash method (see Chapter 5); --- Modified the contents of the test report (see Chapter 6, Chapter 9 of the.2008 edition). This standard is proposed by China Iron and Steel Industry Association. This standard is under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC183). This standard was drafted. China Steel Group New Materials (Zhejiang) Co., Ltd., China Pingmei Shenma Group Kaifeng Carbon Co., Ltd., Changzhou Xinneng Material Inspection Co., Ltd., Shanxi Jinyang Carbon Co., Ltd., Datong Yulinde Graphite New Materials Co., Ltd., Metallurgical Industry Institute of Information Standards. The main drafters of this standard. Huang Yan, Yang Hui, Zheng Jingxu, Xu Jianping, Mao Yuzhen, Chen Wenlai, Wan Jianmin, Wu Jianguo, Zhang Huibing, Kang Jincai, Chi Yide, Duan Xueliang, Yang Jiqing. The previous versions of the standards replaced by this standard are. --- GB/T 8722-1988, GB/T 8722-2008. Method for determining thermal conductivity of carbon materials1 ScopeThis standard specifies the terms and definitions of thermal conductivity of carbon materials, principles, equipment, sample requirements, test procedures, calculation of results, and tests. Reports, etc. This standard applies to the determination of the thermal conductivity of carbon materials.2 Normative referencesThe following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1427 Carbon material sampling method GB/T 8170 Numerical rounding rules and expression and judgment of limit values3 terms and definitionsThe following terms and definitions apply to this document. 3.1 Thermal conductivity The heat transferred through the unit area of the material along the heat flow direction under the unit temperature gradient per unit time, which is used to characterize the thermal conductivity of the material ability. 4 Method 1. Longitudinal heat flow method 4.1 Scope It is suitable for the measurement of thermal conductivity of bulk carbon materials at 100 ℃ ~ 800 ℃. 4.2 Principle Directly energized longitudinal heat flow method. When a cylindrical sample passes DC, the heat generated is mainly conducted along the longitudinal direction of the sample to both ends. Reach After thermal stability, it is considered that there is one-dimensional longitudinal heat flux on the sample, and the heat exchange between the sample and the lateral environment is corrected. 4.3 Equipment 4.3.1 Micrometer. range is 0mm ~ 25mm, accuracy is 0.01mm. 4.3.2 Vernier caliper. Accuracy is 0.02mm. 4.3.3 Ni-Cr-Ni-Si armored thermocouple. bare type. Thermocouple wire diameter 0.4mm ~ 0.5mm. 4.3.4 Precision digital temperature display instrument. resolution 0.1 ℃, accuracy ± 1.3%. 4.3.5 DC digital voltmeter. resolution 0.001mV, accuracy ± 0.006%. 4.3.6 Fixed value shunt. 500A/75mV, class 0.2, with DC millivolt meter with corresponding accuracy. Or the digital voltmeter specified in 4.3.5. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8722-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 8722-2019_English as soon as possible, and keep you informed of the progress. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 8722-2019?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8722-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |