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ASTM C1258隔热用蒸汽缓凝剂耐高温和耐湿度性能标准试验方法
日期:2012-02-13 21:23
ASTM C1258 Standard Test Method for Elevated Temperature and Humidity Resistance of Vapor Retarders for Insulation
ASTM C1258隔热用蒸汽缓凝剂耐高温和耐湿度性能标准试验方法
On sub-ambient temperature systems, humid ambient conditions cause a vapor driving force toward the insulation which, if not retarded, is detrimental to the insulation's thermal resistance. Therefore a vapor retarder should resist degradation. Degradation in this test method is induced by elevated temperature and humidity cond

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