ISO 15758:2014 PDF

Scope: This International Standard 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. This International Standard 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.

ISO 15758:2014 Referenced Document

ASTM STP 1426
DIN 4140:1996 Insulation work on industrial installations and building equipment - Execution of thermal and cold insulations
ISO 12241:2008 Thermal insulation for building equipment and industrial installations - Calculation rules
ISO 12572:2001 Hygrothermal performance of building materials and products - Determination of water vapour transmission properties
ISO 13788:2012 Hygrothermal performance of building components and building elements - Internal surface temperature to avoid critical surface humidity and interstitial condensation - Calculation methods
ISO 9346:2007 Hygrothermal performance of buildings and building materials - Physical quantities for mass transfer - Vocabulary

2014 ISO 15758:2014 Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems
2004 ISO 15758:2004 Hygrothermal performance of building equipment and industrial installations Calculation of water vapour diffusion Cold pipe insulation systems (Second Edition)