# ISO 15758:2004 — Withdrawn and superseded ISO standards For ISO 15758:2004, item title is Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems; status code is 9599; successor is ISO 15758:2014; withdrawn / published date is 2004-09-30, recorded from its source on 2026-08-05. - **Identifier:** ISO 15758:2004 _(verified: appears in the quote below)_ - **Item title:** Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems _(verified: appears in the quote below)_ - **Status code:** 9599 _(verified: appears in the quote below)_ - **Successor:** ISO 15758:2014 - **Withdrawn / published date:** 2004-09-30 _(verified: appears in the quote below)_ ## What the source says > 38212,IS,,ISO 15758:2004,Hygrothermal performance of building equipment and industrial installations — Calculation of water vapour diffusion — Cold pipe insulation systems,Performance hygrothermique des équipements de bâtiments et installations industrielles — Calcul de la diffusion de vapeur d'eau — Systèmes d'isolation de tuyauteries froides,2004-09-30,1,"['91.140.01','91.120.10']",ISO/TC 163/SC 2,9599,,[54473],"['en','fr']",15,"

ISO 15758:2004 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 int ## Source - https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv Last verified: 2026-08-05. Review by: 2027-02-01. Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).