标准摘要
[中文适用范围]： 本国际标准规定了计算冷管绝热系统中水蒸气流速密度以及随时间扩散到绝热层中的水总量的方法。 该计算方法假定水蒸气只能通过扩散迁移到绝缘系统中，而不受气流的影响。 它还假设使用均质、各向同性的绝缘材料，以便水蒸气分压在距管道轴线等距的所有点处保持恒定。 本标准适用于管道内介质温度0℃以上的情况。 它适用于建筑物内部和露天的管道。 [外文原描述]： ISO 15758:2014 specifies a method for calculating the density of the water vapour flow rate in cold pipe insulation systems, and the total amount of water diffused into the insulation over time. The 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. ISO 15758:2014 is applicable when the temperature of the medium in the pipe is above 0 °C. It applies to pipes inside buildings as well as in the open air.
英文名称Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems