SIST EN 15004-11:2024

Fixed firefighting systems - Gas extinguishing systems - Part 11: Physical properties and systems design of gas extinguishing systems for Halocarbon Blend 55 extinguishant (ISO 14520-17:2022, modified)

This document provides specific requirements for gaseous fire-extinguishing systems with respect to the Halocarbon Blend 55 extinguishant. It includes details of physical properties, specification, usage and safety aspects. It also covers systems operating at nominal pressures of 25 bar, 35 bar, and 42 bar and 50 bar, superpressurized with nitrogen. This document does not preclude the use of other systems.
NOTE   1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln - Teil 11: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel Halocarbon Blend 55 (ISO 14520 17:2022, modifiziert)

Dieses Dokument legt spezifische Anforderungen an Löschanlagen mit gasförmigen Löschmitteln fest, bei denen Halocarbon Blend 55 als Löschmittel angewendet wird. Es enthält Einzelheiten zu physikalischen Eigenschaften, zur Spezifikation, zum Einsatz und zu Sicherheitsaspekten. Es behandelt außerdem Anlagen, die bei Nenndrücken von 25 bar, 35 bar, 42 bar und 50 bar betrieben und mit Stickstoff drucküberlagert werden. Dieses Dokument schließt die Verwendung anderer Anlagen nicht aus.
ANMERKUNG   1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

Installations fixes de lutte contre l’incendie - Installations d’extinction à gaz - Partie 11 : Propriétés physiques et conception des systèmes des installations d’extinction à gaz pour agent extincteur hydrocarbure halogéné, mélange 55 (ISO 14520-17:2022, modifiée)

Le présent document fournit des exigences spécifiques relatives aux installations d’extinction à gaz utilisant de l’agent extincteur halocarbure, Blend 55. Il inclut des détails relatifs à ses propriétés physiques, sa spécification, son usage ainsi que ses aspects de sécurité. Il couvre spécifiquement les installations fonctionnant à une pression nominale de 25 bar, 35 bar, 42 bar et 50 bar surpressurisées à l’azote. Le présent document n’exclut pas l’utilisation d’autres systèmes.
NOTE   1 bar = 0,1 MPa = 105 Pa ; 1 MPa = 1 N/mm2.

Vgrajeni gasilni sistemi - Sistemi za gašenje s plinom - 11. del: Fizikalne lastnosti in načrtovanje sistema za gašenje z gasilnim sredstvom Halocarbon Blend 55 (ISO 14520-17:2022, spremenjen)

Ta dokument določa specifične zahteve za sisteme za gašenje s plinom v povezavi z gasilnim sredstvom Halocarbon Blend 55. Vsebuje podrobnosti o fizikalnih lastnostih, specifikacijah, uporabi in varnostnih vidikih. Zajema tudi sisteme, ki delujejo pri nazivnih tlakih 25, 35, 42 in 50 barov, ki so pod izjemnim tlakom, doseženim z dušikom. Ta dokument ne izključuje uporabe drugih sistemov.
OPOMBA:   1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

General Information

• Status: Published
• Public Enquiry End Date: 11-Jul-2023
• Publication Date: 12-Aug-2024
• ICS: 13.220.10 - Fire-fighting
• ICS: 13.220.20 - Fire protection
• Technical Committee: POZ - Požarna varnost
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 08-Aug-2024
• Due Date: 13-Oct-2024
• Completion Date: 13-Aug-2024
• Ref Project: EN 15004-11:2024 - Fixed firefighting systems - Gas extinguishing systems - Part 11: Physical properties and systems design of gas extinguishing systems for Halocarbon Blend 55 extinguishant (ISO 14520-17:2022, modified)

Overview

EN 15004-11:2024 - Fixed firefighting systems - Gas extinguishing systems - Part 11 - specifies the physical properties and systems design rules for gaseous fire-extinguishing systems using Halocarbon Blend 55 (ISO 14520-17:2022, modified). Published by CEN, this standard covers product specification, storage and container characteristics, extinguishing and design concentrations, safety of personnel, environmental considerations, and systems operating at nominal pressures of 25, 35, 42 and 50 bar, superpressurized with nitrogen.

Key topics and technical requirements

• Extinguishant composition and purity: Halocarbon Blend 55 is a ~50/50 mass blend of HFO‑1233zd(E) and FK‑5‑1‑12. Minimum purity is 99.5% by mass; limits for acidity, water content and non‑volatile residue are specified.
• Physical properties: Molecular mass (184.72), boiling point (20.7 °C), high vapour density (~6.38× air) and other critical properties are tabulated for design calculations.
• Design and extinguishing concentrations: Tables provide mass-per-volume requirements and reference extinguishing/design concentrations (examples: extinguishing concentrations for common fuels are typically in the mid 5%–6% range; higher hazard minimum design concentrations up to 7.8% by volume).
• Container fill density and pressure limits: Maximum fill density and maximum working pressures are given for each nominal system pressure (e.g., max fill density ≈ 1 308 kg/m³ for 25/35 bar containers). Exceeding fill density risks “liquid full” conditions and rapid pressure rise with temperature.
• System design parameters: Fill density, superpressurization method (nitrogen), required agent quantity per protected volume, temperature/pressure relationships and guidance on alternative fill/superpressurization levels.
• Safety and toxicology: Personnel safety considerations include hazards from the agent, combustion products and decomposition products. Toxicological limits (e.g., NOAEL ~8.7% by volume) and 4‑hour LC50 data are provided.
• Environmental properties: Environmental behavior and considerations are addressed to support compliant selection and use.

Practical applications and users

EN 15004-11:2024 is intended for professionals involved in design, installation, commissioning and regulation of fixed gas extinguishing systems using Halocarbon Blend 55. Typical users include:

• Fire protection engineers and system designers
• Manufacturers of extinguishing agents and storage containers
• Installers, commissioning and maintenance teams
• Facility managers and safety officers for enclosed hazards (e.g., data centers, telecom rooms, electrical/industrial control enclosures)
• Regulators and conformity assessment bodies

The standard enables safe, compliant deployment of total flooding gas extinguishing systems, defining the calculations and constraints needed to size agent storage, determine design concentrations and manage personnel and environmental safety.

Related standards

• EN 15004-1:2019 - Design, installation and maintenance (normative reference)
• ISO 14520-17:2022 - Source international standard (taken over and modified by CEN)

Keywords: EN 15004-11:2024, Halocarbon Blend 55, gas extinguishing systems, fixed firefighting systems, fill density, design concentration, superpressurized with nitrogen, CEN standard, extinguishant properties.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2024
Vgrajeni gasilni sistemi - Sistemi za gašenje s plinom - 11. del: Fizikalne lastnosti
in načrtovanje sistema za gašenje z gasilnim sredstvom Halocarbon Blend 55 (ISO
14520-17:2022, spremenjen)
Fixed firefighting systems - Gas extinguishing systems - Part 11: Physical properties and
systems design of gas extinguishing systems for Halocarbon Blend 55 extinguishant
(ISO 14520-17:2022, modified)
Ortsfeste Brandbekämpfungsanlagen - Löschanlagen mit gasförmigen Löschmitteln -
Teil 11: Physikalische Eigenschaften und Anlagenauslegung für Feuerlöschmittel
Halocarbon Blend 55 (ISO 14520 17:2022, modifiziert)
Installations fixes de lutte contre l’incendie - Installations d’extinction à gaz - Partie 11 :
Propriétés physiques et conception des systèmes des installations d’extinction à gaz
pour agent extincteur hydrocarbure halogéné, mélange 55 (ISO 14520-17:2022,
modifiée)
Ta slovenski standard je istoveten z: EN 15004-11:2024
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15004-11
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2024
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Gas extinguishing systems -
Part 11: Physical properties and systems design of gas
extinguishing systems for Halocarbon Blend 55
extinguishant (ISO 14520-17:2022, modified)
Installations fixes de lutte contre l'incendie - Ortsfeste Brandbekämpfungsanlagen - Löschanlagen
Installations d'extinction à gaz - Partie 11 : Propriétés mit gasförmigen Löschmitteln - Teil 11: Physikalische
physiques et conception des systèmes des installations Eigenschaften und Anlagenauslegung für
d'extinction à gaz pour agent extincteur halocarbure, Feuerlöschmittel Halocarbon Blend 55 (ISO 14520-
Blend 55 (ISO 14520-17:2022, modifiée) 17:2022, modifiziert)
This European Standard was approved by CEN on 10 June 2024.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15004-11:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Characteristics and uses . 5
4.1 General. 5
4.2 Use of Halocarbon Blend 55 . 6
5 Safety of personnel . 9
6 System design . 10
6.1 Fill density . 10
6.2 Superpressurization . 11
6.3 Extinguishant quantity . 11
6.4 Other fill density and superpressurization levels . 15
7 Environmental properties . 16

European foreword
This document (EN 15004-11:2024) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2025, and conflicting national standards shall
be withdrawn at the latest by January 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
The text of ISO 14520-17:2022 has been prepared by Technical Committee ISO/TC 21 “Equipment for
fire protection and fire fighting” of the International Organization for Standardization (ISO) and has been
taken over as EN 15004-11:2024 by Technical Committee CEN/TC 191 “Fixed firefighting systems”, the
secretariat of which is held by BSI; with common modifications which are indicated by a straight line in
the margin of the text.
This European Standard will consist of the following parts, under the general title Fixed firefighting
systems — Gas extinguishing systems:
— Part 1: Design, installation and maintenance;
— Part 2: Physical properties and system design of gas extinguishing systems for FK-5-1-12 extinguishant;
— Part 4: Physical properties and system design of gas extinguishing systems for HFC 125 extinguishant;
— Part 5: Physical properties and system design of gas extinguishing systems for HFC 227ea extinguishant;
— Part 6: Physical properties and system design of gas extinguishing systems for HFC 23 extinguishant;
— Part 7: Physical properties and system design of gas extinguishing systems for IG-01 extinguishant;
— Part 8: Physical properties and system design of gas extinguishing systems for IG-100 extinguishant;
— Part 9: Physical properties and system design of gas extinguishing systems for IG-55 extinguishant;
— Part 10: Physical properties and system design of gas extinguishing systems for IG-541 extinguishant;
— Part 11: Physical properties and systems design of gas extinguishing systems for Halocarbon Blend 55
extinguishant.
The International Standards ISO 14520-2 and ISO 14520-11, which dealt with CF I and HFC 236fa
extinguishants, respectively, have not been implemented by CEN, as CF I is only valid for local application
and HFC 236fa extinguishant is only applicable for portable fire extinguishers and local application,
respectively, which is not covered by the scope.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document provides specific requirements for gaseous fire-extinguishing systems with respect to the
Halocarbon Blend 55 extinguishant. It includes details of physical properties, specification, usage and
safety aspects. It also covers systems operating at nominal pressures of 25 bar, 35 bar, and 42 bar and
50 bar, superpressurized with nitrogen. This document does not preclude the use of other systems.
5 2
NOTE 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 15004-1:2019 , Fixed firefighting systems — Gas extinguishing systems — Part 1: Design, installation
and maintenance (ISO 14520-1:2015, modified)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 15004-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Characteristics and uses
4.1 General
Extinguishant Halocarbon Blend 55 shall comply with the specifications shown in Table 1.
Halocarbon Blend 55 [blend of (50 ± 3) % HFO-1233zd(E) and (50 ± 3) % FK-5-1-12 (by mass)] is a
colourless, almost odourless, electrically non-conductive gas, with a density approximately 6,38 times
that of air.
Its physical properties are shown in Table 2.
Halocarbon Blend 55 extinguishes fires mainly by physical means, but also by some chemical means.

Under revision.
Table 1 — Specifications for Halocarbon Blend 55
Property Requirement
Purity 99,5 % by mass, min.
−4
Acidity
3 × 10 % by mass, max.
−4
Water content
10 × 10 % by mass, max.
−4
Non-volatile residue
300 × 10 % by mass, max.
Suspended matter or sediment None visible
a
< 5 600 mg/kg
Kinetic dimers of HFP
b
< 190 mg/kg
Thermodyn
...