ASTM C687测定松填建筑绝热材料热阻的标准规范
日期:2012-02-13 19:01
thermal resistances, the multiple density strategy has been used.
When applicable specifications or codes do not specify the nominal thermal resistance level to be used for comparison purposes, a recommended practice is to use the Rsi (metric) = 3.3 m2K/W (RIP = 19 [h ft2F/Btu]) label density and thickness for that measurement.
If the density for test purposes is not available from the coverage chart, a test density shall be established by use of applicable specifications and codes or, if none
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