标准编号：ISO 15758:2004
中文名称：建筑物设备和工业装置的温湿性能.水蒸气扩散的计算.冷管绝缘系统
英文名称：Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems
发布日期：2004-10
标准范围
This standard specifies a method to calculate the density of water vapour flow rate in cold pipe insulation systems, and the total amount of water diffused into the insulation over time. This calculation method presupposes that water vapour can only migrate into the insulation system by diffusion, with no contribution from airflow. It also assumes the use of homogeneous, isotropic insulation materials so that the water vapour partial pressure is constant at all points equidistant from the axis of the pipe. The standard is applicable when the temperature of the medium in the pipe is above 0 ℃. It applies to pipes inside buildings as well as in the open air.
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