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ASTM C755热绝缘用水蒸气缓凝剂选择的标准规范
日期:2012-02-13 19:09
eratures should include an adequate vapor retarder system. This may be separate and distinct from the insulation system or may be an integral part of it. For selection of adequate retarder systems to control vapor diffusion, it is necessary to establish acceptable practices and standards.
Vapor Retarder FunctionWater entry into an insulation system may be through diffusion of water vapor, air leakage carrying water vapor, and leakage of surface water. The primary function of a vapor retarder is

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