{"product_id":"gbt7962-13-2025","title":"GB\/T 7962.13-2025 English PDF (GB\/T7962.13-2025)","description":"\u003ch1\u003eGB\/T 7962.13-2025: Test methods of colourless optical glass - Part 13: Thermal conductivity\u003c\/h1\u003e\u003cb style=\"font-size:16px;\"\u003eDelivery:\u003c\/b\u003e 9 seconds. Download (and Email) true-PDF + Invoice.\u003cbr\u003e\u003cb style=\"font-size:16px;\"\u003eGet Quotation:\u003c\/b\u003e Click \u003ca style=\"color: blue;\" href=\"https:\/\/www.chinesestandard.net\/Cart\/Cart.aspx?GB\/T%207962.13-2025_English\" rel=\"nofollow\"\u003eGB\/T 7962.13-2025\u003c\/a\u003e (Self-service in 1-minute)\u003cbr\u003e\u003cb style=\"font-size:16px;\"\u003eNewer \/ historical versions: \u003c\/b\u003e \u003ca style=\"color: blue;\" href=\"https:\/\/www.chinesestandard.net\/PDF.aspx\/GBT7962.13-2025\"\u003eGB\/T 7962.13-2025\u003c\/a\u003e\u003ch2\u003ePreview True-PDF\u003c\/h2\u003e\u003ciframe src=\"https:\/\/www.chinesestandard.net\/Preview_PDF.aspx\/GBT7962.13-2025\" width=\"445\" height=\"600\" title=\"GB\/T 7962.13-2025 True-PDF\"\u003e\u003c\/iframe\u003e \u003cbr\u003e\u003ch2\u003eScope\u003c\/h2\u003eThis document describes a method for determining the thermal conductivity of colorless optical \u003cbr\u003eglass. \u003cbr\u003eThis document applies to the test of the thermal conductivity of colorless optical glass. The \u003cbr\u003eflash method applies to the dynamic test of thermal conductivity and thermal diffusivity at a \u003cbr\u003egiven temperature point. The guarded hot plate method applies to the steady-state test of thermal \u003cbr\u003econductivity at a stable temperature difference. The test of thermal conductivity for other types \u003cbr\u003eof glass may take this as a reference. \u003cbr\u003e\u003cbr\u003e\u003ch2\u003eBasic Data\u003c\/h2\u003e\u003ctable id=\"TableTabAbout0\" rules=\"all\" border=\"1\" style=\"font-family:Arial;font-size:Small;\"\u003e  \u003ctr id=\"TableTabRow10\"\u003e     \u003ctd id=\"TableTabCell110\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eStandard ID\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell120\" align=\"center\"\u003e GB\/T 7962.13-2025 (GB\/T7962.13-2025)\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow20\"\u003e     \u003ctd id=\"TableTabCell210\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eDescription (Translated English)\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell220\" align=\"center\"\u003e Test methods of colourless optical glass - Part 13: Thermal conductivity\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow30\"\u003e     \u003ctd id=\"TableTabCell310\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eSector \/ Industry\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell320\" align=\"center\"\u003e National Standard (Recommended)\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow40\"\u003e     \u003ctd id=\"TableTabCell410\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eClassification of Chinese Standard\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell420\" align=\"center\"\u003e L50\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow50\"\u003e     \u003ctd id=\"TableTabCell510\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eClassification of International Standard\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell520\" align=\"center\"\u003e 81.040.01\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow60\"\u003e     \u003ctd id=\"TableTabCell610\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eWord Count Estimation\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell620\" align=\"center\"\u003e 14,185\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow70\"\u003e     \u003ctd id=\"TableTabCell710\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eDate of Issue\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell720\" align=\"center\"\u003e 2025-06-30\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow80\"\u003e     \u003ctd id=\"TableTabCell810\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eDate of Implementation\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell820\" align=\"center\"\u003e 2026-01-01\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow90\"\u003e     \u003ctd id=\"TableTabCell910\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eOlder Standard (superseded by this standard)\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell920\" align=\"center\"\u003e GB\/T 7962.13-1987\u003c\/td\u003e  \u003c\/tr\u003e\n\u003ctr id=\"TableTabRow100\"\u003e     \u003ctd id=\"TableTabCell1010\" align=\"center\" font=\"bold\"\u003e \u003cb\u003eIssuing agency(ies)\u003c\/b\u003e \u003c\/td\u003e    \u003ctd id=\"TableTabCell1020\" align=\"center\"\u003e State Administration for Market Regulation, China National Standardization Administration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003cbr\u003e\u003cbr\u003e","brand":"www.ChineseStandard.us -- Field Test Asia Pte. Ltd.","offers":[{"title":"Default Title","offer_id":53614071349562,"sku":null,"price":275.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/5737\/1706\/files\/GBT7962.13-2025EN.1.jpg?v=1781621179","url":"https:\/\/www.chinesestandard.us\/products\/gbt7962-13-2025","provider":"www.ChineseStandard.us (www.ChineseStandard.net)","version":"1.0","type":"link"}