标准摘要
[中文适用范围]： 本文件规定了通过扩散测定试样长期吸水率的设备和程序。 适用于保温制品。 它旨在模拟产品的吸水率，该产品的两侧均处于高相对湿度（接近 100%），并且长期处于水蒸气压力梯度下，例如倒置屋顶或无保护的地面绝缘层。 该测试并不适用于所有类型的隔热产品。 相关产品标准应规定该测试适用于其哪些产品（如有）。 注：对于无保护的接地绝缘，当有更多数据可用时，50°C 的温度可以用较低的温度代替。 [外文原描述]： This document specifies the equipment and procedures for determining the long-term water absorption of test specimens by diffusion. It is applicable to thermal insulating products. It is intended to simulate the water absorption of products subjected to high relative humidities, approximating to 100 %, on both sides and subjected to a water vapour pressure gradient for a long period of time e.g. inverted roof or unprotected ground insulation. The test is not applicable for all types of thermal insulating products. The relevant product standard should state for which of its products, if any, this test is applicable.
英文名称Thermal insulating products for building applications — Determination of long-term water absorption by diffusion