NF EN ISO 15758

NF EN ISO 15758

June 2014
Standard Current

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

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.

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Main informations

Collections

National standards and national normative documents

Publication date

June 2014

Number of pages

25 p.

Reference

NF EN ISO 15758

ICS Codes

91.120.10   Thermal insulation of buildings
91.140.01   Installations in buildings in general

Classification index

P50-770

Print number

1

International kinship

ISO 15758:2014

European kinship

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

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.

Replaced standards (1)
NF EN 14114
December 2002
Standard Cancelled
Hygrothermal performance of building of equipment and industrial installations - Calculation of water vapour diffusion - Cold pipe insulations systems

Le présent document spécifie une méthode permettant de calculer, sous certaines conditions relatives à la différence de pression partielle de vapeur d'eau ainsi que les températures de l'air ambiant et de fluide circulant dans la tuyauterie, la densité du flux de vapeur d'eau dans les systèmes d'isolation ainsi que la quantité totale d'eau diffusée dans l'isolation en fonction du temps. La présente méthode s'applique aussi bien pour les tuyauteries situées à l'intérieur du bâtiment que celles situées à l'air libre. La température du fluide circulant dans la tuyauterie doit être supérieure à 0 °C.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes, définitions et symboles
    1
  • 4 Formules de calcul
    3
  • 5 Conditions aux limites
    6
  • 6 Méthode de calcul
    6
  • Annexe A (informative) Exemples
    9
  • Annexe B (informative) Système possédant une capacité de séchage et détermination expérimentale du taux d'évaporation à la surface d'un tissu capillaire mouillé
    11
  • Bibliographie
    15
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