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ISO 15758:2014

Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems

May 5, 2014

General information

90.20     Jan 15, 2026

ISO

ISO/TC 163/SC 2

International Standard

91.120.10     91.140.01  

English   French  

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Published

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 15758:2004

NOW

PUBLISHED
ISO 15758:2014
90.20 Standard under periodical review
Jan 15, 2026

National adoptions

SRPS EN ISO 15758:2015  
ISS

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

60.60   Standard published

U163 more

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