NF EN ISO 21805

NF EN ISO 21805

March 2023
Standard Current

Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems

This document gives guidelines for fulfilling the requirements contained in ISO 6183:2022, 6.4.1 and 7.4.1 and ISO 14520‑1:2023, 5.2.1 h) and 5.3 h), in respect to over- and under-pressurization venting and post-discharge extract. It considers the design, selection and installation of vents to safeguard the structural integrity of enclosures protected by fixed gaseous extinguishing systems and the post-discharge venting provisions where used.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2023

Number of pages

50 p.

Reference

NF EN ISO 21805

ICS Codes

13.220.10   Fire-fighting
91.140.30   Ventilation and air-conditioning systems

Classification index

S62-805

Print number

1

International kinship

ISO 21805:2023

European kinship

EN ISO 21805:2023
Sumary
Guidance and recommendations on design, selection and installation of vents to safeguard the structural integrity of enclosures protected by gaseous fire-extinguishing systems

This document gives guidelines for fulfilling the requirements contained in ISO 6183:2022, 6.4.1 and 7.4.1 and ISO 14520‑1:2023, 5.2.1 h) and 5.3 h), in respect to over- and under-pressurization venting and post-discharge extract.

It considers the design, selection and installation of vents to safeguard the structural integrity of enclosures protected by fixed gaseous extinguishing systems and the post-discharge venting provisions where used.

Table of contents
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  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles et termes abrégés
  • 5 Utilisation et limitations
  • 6 Sécurité
  • 7 Conception du système - Évents de surpression
  • 8 Conception du système - Ventilation post-émission
  • 9 Acceptation
  • 10 Service et maintenance
  • Annexe A (informative) Développement des formules propres à l'agent pour les gaz liquéfiables
  • Annexe B (informative) Méthode de développement des formules propres à l'agent pour les gaz liquéfiables
  • Bibliographie
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