GB/T 40540-2021 English PDFUS$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 40540-2021: Specification for silicone grease thermal filler of spacecraft Status: Valid
Basic dataStandard ID: GB/T 40540-2021 (GB/T40540-2021)Description (Translated English): Specification for silicone grease thermal filler of spacecraft Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: V13 Word Count Estimation: 14,142 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 40540-2021: Specification for silicone grease thermal filler of spacecraft---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.Specification for silicone grease thermal filler of spacecraft ICS 49.025.99 CCSV13 National Standards of People's Republic of China Specification for thermal conductive grease for spacecraft Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Aerospace Technology and Application Standardization Technical Committee (SAC/TC425). Drafting organizations of this document. Beijing Space Vehicle General Design Department, China Aerospace Standardization Institute. The main drafters of this document. Miao Jianyin, Li Wenjun, Ren Xiaozhi, Wang Lu, Liu Chang, Li Guoguang, Mi Min, Wu Qi, Xu Dongyan, Ren Chi, Li Hangyu, Lin Haibo, Zhang Xingchao, Zhou Jingyi, Zheng Wei. Specification for thermal conductive grease for spacecraft1 ScopeThis document specifies the technical requirements, inspection methods, inspection rules, packaging and marking, transportation and storage of thermally conductive silicone grease for spacecraft. This document is applicable to the inspection, delivery and use of thermally conductive silicone grease for spacecraft (hereinafter referred to as thermally conductive silicone grease).2 Normative referencesThe contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 269 Method for measuring the penetration of lubricating grease and petroleum grease GB/T 8928 Solid and semi-solid petroleum pitch density determination method GB/T 34517 Evaluation method for vacuum outgassing of non-metallic materials for spacecraft HG/T 2502 5201 silicone grease SH/T 0324 Lubricating Grease Steel Mesh Oil Separation Method (Static Method)3 Terms and definitionsThe following terms and definitions defined in GB/T 269 and GB/T 34517 apply to this document. 3.1 Contact heat transfer coefficient thermalcontactconductancecoefficient The heat transfer per unit area, unit temperature difference, and unit time between two contact surfaces, the unit is W/(m2·K). 3.2 Colected volatilecondensable material content; CVCM The material sampling is under the specified temperature and vacuum conditions, after a given temperature and time, the volatile matter that can be condensed on the surface is collected The ratio of mass to the initial mass of the sample, usually expressed as a percentage. Note. The English abbreviation CVCM for the content of condensable volatile matter is the general domestic use rule. 3.3 Total mass loss rate; TML For the sampling of materials containing condensable volatiles, the total mass lost in a given time under the specified temperature and vacuum conditions is the same as that of the sample. The ratio of initial mass, usually expressed as a percentage. Note. The English abbreviation TML for total mass loss rate is the general domestic use rule.4 Technical requirements4.1 Composition Thermally conductive silicone grease is a combination of organic silicon material compounds and inorganic fillers such as zinc oxide. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 40540-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 40540-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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