EN 14972-1:2020/FprA1
(Amendment)Fixed firefighting systems - Water mist systems - Part 1: Design, installation, inspection and maintenance
Fixed firefighting systems - Water mist systems - Part 1: Design, installation, inspection and maintenance
This document specifies requirements and gives recommendations for the design, installation, inspection and maintenance of all types of fixed land based water mist systems.
This document is intended to apply to water mist automatic nozzle systems and water mist deluge systems supplied by stand alone or pumped systems.
The document covers only applications and occupancies which are covered by the fire test protocols of the EN 14972 series.
Aspects of water mist associated with explosion protection and/or use within vehicles are not covered by this document.
This document does not cover all legislative requirements. In certain countries specific national regulations apply and take precedence over this document. Users of this document are advised to inform themselves of the applicability or non-applicability for this document by their national responsible authorities.
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 1: Planung, Einbau, Inspektion und Wartung
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 1 : Conception, installation, inspection et maintenance
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 1. del: Načrtovanje, vgradnja, pregled in vzdrževanje - Dopolnilo A1
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14972-1:2021/oprA1:2024
01-julij-2024
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 1. del: Načrtovanje, vgradnja,
pregled in vzdrževanje
Fixed firefighting systems - Water mist systems - Part 1: Design, installation, inspection
and maintenance
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 1: Planung, Einbau,
Inspektion und Wartung
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 1 :
Conception, installation, inspection et maintenance
Ta slovenski standard je istoveten z: EN 14972-1:2020/prA1
ICS:
13.220.10 Gašenje požara Fire-fighting
SIST EN 14972-1:2021/oprA1:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
SIST EN 14972-1:2021/oprA1:2024
SIST EN 14972-1:2021/oprA1:2024
DRAFT
EUROPEAN STANDARD
EN 14972-1:2020
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2024
ICS 13.220.20
English Version
Fixed firefighting systems - Water mist systems - Part 1:
Design, installation, inspection and maintenance
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Feinsprüh-
à brouillard d'eau - Partie 1 : Conception, installation, Löschanlagen - Teil 1: Planung, Einbau, Inspektion und
inspection et maintenance Wartung
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 191.
This draft amendment A1, if approved, will modify the European Standard EN 14972-1:2020. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.
This draft amendment was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
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 14972-1:2020/prA1:2024 E
worldwide for CEN national Members.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
Contents Page
European foreword . 3
1 Modification to Clause 3, “Terms and definitions” . 4
2 Modifications to Clause 4, “Design” . 4
3 Addition of new Annex C, “Limits of applicability for water mist systems tested in
accordance to EN 14972-2” . 8
4 Addition of new Annex D, “Limits of applicability for water mist systems tested in
accordance to EN 14972-3” . 11
5 Addition of new Annex E, “Limits of applicability for water mist systems tested in
accordance to EN 14972-4” . 13
6 Addition of new Annex F, “Limits of applicability for water mist systems tested in
accordance to EN 14972-5” . 15
7 Addition of new Annex G, “Limits of applicability for water mist systems tested in
accordance to EN 14972-6” . 16
8 Addition of new Annex H, “Limits of applicability for water mist systems tested in
accordance to EN 14972-7” . 17
9 Addition of new Annex I, “Limits of applicability for water mist systems tested in
accordance to EN 14972-8” . 18
10 Addition of new Annex J, “Limits of applicability for water mist systems tested in
accordance to EN 14972-9” . 20
11 Addition of new Annex K, “Limits of applicability for water mist systems tested in
accordance to EN 14972-10” . 22
12 Addition of new Annex L, “Limits of applicability for water mist systems tested in
accordance to EN 14972-11” . 23
13 Addition of new Annex M, “Limits of applicability for water mist systems tested in
accordance to EN 14972-12” . 24
14 Addition of new Annex N, “Limits of applicability for water mist systems tested in
accordance to EN 14972-13” . 25
15 Addition of new Annex O, “Limits of applicability for water mist systems tested in
accordance to EN 14972-14” . 26
16 Addition of new Annex P, “Limits of applicability for water mist systems tested in
accordance to EN 14972-15” . 27
17 Addition of new Annex Q, “Limits of applicability for water mist systems tested in
accordance to EN 14972-16” . 28
18 Addition of new Annex R, “Limits of applicability for water mist systems tested in
accordance to EN 14972-17” . 29
19 Addition of new Annex S, “General tolerances” . 30
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
European foreword
This document (EN 14972-1:2020/prA1:2024) has been prepared by Technical Committee CEN/TC 191
“Fixed firefighting systems”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
1 Modification to Clause 3, “Terms and definitions”
Replace the term 3.1.6 with the following:
"
3.1.6
automatic water mist nozzle
component with one or more orifices, which is designed to produce and discharge water mist
automatically, where the nozzles operate independently of other nozzles by means of a
detection/activation device built into the nozzle
”.
2 Modifications to Clause 4, “Design”
Add the following paragraph at the end of 4.1.1:
“If no other tolerance is specified, the general tolerances in Annex S shall be applied.”.
Replace the paragraph in 4.1.3.1 with the following:
“The safe use of a water mist system is limited to applications it has been tested for. Water mist systems
shall be tested in accordance with the fire test protocols of the EN 14972 series.
Annex A gives guidelines on how to develop new fire test protocols to be added under the EN 14972
series.
The applicability of the fire test protocols are described in Annexes C through R. For the given application,
the relevant annex shall be applied.”
In 4.2.2, item c), add “and storage” to read:
“c) description of hazards and storage”.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
In 4.9.4.3, replace Table 1 with the following:
“
Table 1 — Design criteria
c d
Occupancy Minimum design Minimum nozzle Fire test protocol
a a
quantity
area
Sales areas, storage areas adjacent 216 m — EN 14972-2
to sales areas, archives, libraries,
technical areas/mechanical floors
or similar.
Cellular offices and open plan 72 m 6 EN 14972-3
offices, areas with counters,
restaurants and kitchens, public
areas in buildings with low fire
load, escape routes or other
corridors, churches, museums,
hotel rooms, rooms in hospitals,
nursing homes, senior citizens
residences, flats, training
classrooms, recreation areas. As
well as further comparable risks.
Apartments, churches, concealed 140 m 9 EN 14972-4
spaces (greater 800 mm in height),
gymnasiums, hospitals and
hospital laboratories, hotel rooms,
libraries, museums, offices,
meeting rooms, restaurant seating
areas, kitchens, schools and
university class rooms, unused
attics, institutions.
Non-stacking garages, fully 144 m (wet — EN 14972-5
enclosed garages and underground system)
garages for horizontal, solid, flat
180 m (dry
ceilings with heights of 2 m and
system)
above.
Horizontal false ceilings and false 72 m 6 EN 14972-6
floors between 300 mm and
800 mm.
Apartments, churches, concealed 72 m 6 EN 14972-7
spaces, gymnasiums, hospitals,
hotel rooms, libraries, museums,
offices, restaurant seating areas,
schools and university class rooms
and unused attics.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
c d
Occupancy Minimum design Minimum nozzle Fire test protocol
a a
area quantity
Dwelling house, flat, maisonette, For rooms greater All nozzles in the EN 14972-17
transportable home, house of than 64 m : largest
multiple occupation, bed and compartment up
64 m
breakfast accommodation, to maximum 4.
boarding houses and blocks of flats
of 18 m or less in height and with a
maximum total floor area of
2 400 m .
Blocks of flats greater than 18 m up For rooms greater 4 EN 14972-17
to 45 m in height, sheltered and than 64 m :
extra care housing, residential care 2
64 m
premises, residential rehabilitation
accommodation, dormitories and
b
hostels up to 45 m in height .
a
Values applicable for wet pipe water mist systems unless indicated.
b
Some countries may have national annex with guidance on the maximum height and any additional
requirements for apartment buildings higher than 18 m.
c
The overlap in occupancies described in the table is due to more than one fire test protocol in EN 14972
series, covering the same occupancy. Refer to Annexes C through R, and the DIOM manual, for the minimum
design criteria for the respective fire test protocol for the water mist system.
d
The occupancies are intended to be covered by the fire test protocols (see the European foreword). Where
available are listed in column and otherwise are in preparation.
”.
In 4.13.5, replace Table 3 with the following:
“
Table 3 — Minimum discharge operating time
Fire extinguishing Discharge operating time
systems
Wet benches Twice the extinguishment time.
Minimum operation time is 2 min.
Time delay limited to 30 s, unless otherwise proven in the tests.
Commercial deep fat Twice the total time it takes to extinguish the fire and to cool the oil below
cooking fryers the auto-ignition temperature in accordance with the fire test protocol.
Minimum operation time is 10 min.
Industrial oil cookers Twice the total time it takes to extinguish the fire and to cool the oil below
the flash point in accordance with the fire test protocol.
Minimum operation time is 10 min.
Other fire extinguishing Whichever is greater:
systems
— twice the longest extinguishment time in the relevant fire tests;
— the time to shut down the process equipment; or
— 10 min.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
”.
In 4.13.5, replace Table 4 with the following:
"
Table 4 — Minimum time of operation
a
Occupancy Minimum Fire test protocol
Operation Time
min
Sales areas, storage areas adjacent to sales areas, 60 EN 14972-2
archives, libraries, technical areas or similar.
Cellular offices and open plan offices, areas with 60 EN 14972-3
counters, restaurants and kitchens, public areas in
buildings of low fire load, escape routes or other
corridors, churches, museums, hotel rooms, rooms
in hospitals, nursing homes, senior citizens
residences, flats, training classrooms, recreation
areas. As well as further comparable risks.
Apartments, churches, concealed spaces (greater 60 EN 14972-4
800 mm in height), gymnasiums, hospitals and
hospital laboratories, hotel rooms, libraries,
museums, offices, meeting rooms, restaurant
seating areas, kitchens, schools and university class
rooms, unused attics, institutions.
Non-stacking garages, fully enclosed garages and 60 EN 14972-5
underground garages for horizontal, solid, flat
ceilings with heights of 2 m and above.
Horizontal false ceilings and false floors between 60 EN 14972-6
300 mm and 800 mm.
Apartments, churches, concealed spaces, 60 EN 14972-7
gymnasiums, hospitals, hotel rooms, libraries,
museums, offices, restaurant seating areas, schools
and university class rooms and unused attics.
Atriums with low or medium fire load, where the 60 EN 14972-10
fire load is maximum 1,5 m high.
Cable tunnels with maximum 1 m/s longitudinal 30 EN 14972-11
ventilation.
Dwelling house, flat, maisonette, transportable 10 EN 14972-17
home.
House of multiple occupation, bed and breakfast 30 EN 14972-17
accommodation, boarding houses and blocks of flats
of 18 m or less in height and with a maximum total
floor area of 2 400 m .
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
a
Occupancy Minimum Fire test protocol
Operation Time
min
Blocks of flats up to 18 m in height, sheltered and 30 EN 14972-17
extra care housing, residential care premises,
residential rehabilitation accommodation,
dormitories and hostels.
Blocks of flats greater than 18 m up to 45 m in 60 EN 14972-17
height, sheltered and extra care housing, residential
care premises, residential rehabilitation
accommodation, dormitories and hostels from 18 m
b
to 45 m in height .
a
The occupancies are intended to be covered by the fire test protocols (see European Foreword). Where
available are listed in column 1 and otherwise are in preparation.
b
Some countries may have national annex with guidance on the maximum height and any additional
requirements for apartment buildings higher than 18 m.
c
The overlap in occupancies described in the table is due to more than one fire test protocol in EN 14972
series, covering the same occupancy. Refer to Annexes C through R, and the DIOM manual, for the minimum
design criteria for the respective fire test protocol for the water mist system.
".
In 4.13.7.2, Figure 3, for key part 18, replace “pump flow test main” with “pump flow test meter”.
For key 19, replace “alterantive" with “alternative”.
3 Addition of new Annex C, “Limits of applicability for water mist systems tested
in accordance to EN 14972-2”
Add the following new Annex C:
“
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
Annex C
(normative)
Limits of applicability for water mist systems tested in accordance to
EN 14972-2
C.1 General
Systems tested according to EN 14972-2 are limited to the maximum ceiling height tested with a
minimum ceiling height of 2,6 m.
The minimum distance between the storage height and the ceiling shall be 0,5 m.
If the glass bulb temperature used in the fire test is less than 68 °C, the fire test protocol is only applicable
to that glass bulb temperature.
C.2 Regarding the scope of the water mist system
A water mist system successfully tested according to the test protocol EN 14972-2 is applicable to the
following areas:
— sales areas;
— storage areas adjacent to sales areas (excluding flammable liquids, gases and other highly flammable
areas);
— archives;
— libraries;
— technical areas;
— or similar.
Typical examples of storage types are shown in Figure C.1. Limitations are given in Table C.1. The
maximum total protected area for combined storage areas is 500 m .
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
Key
a free-standing storage (ST1)
b palletised rack (ST4)
c single-row post pallet storage (ST2)
d multiple-row post pallet storage (ST3)
e solid or stated shelves (ST5/ST6)
Figure C.1 — Storage types
Table C.1 — Limitations and additional requirements for different storage types
Storage Limitations
type
ST1 Storage shall be subdivided by aisles of at least 2,4 m into blocks of no more than
150 m .
ST2 Aisles between rows are at least 2,4 m wide.
ST3 Protection is only possible, when the system has been specifically fire tested for this
configuration.
ST4 Aisles between rows are at least 1,2 m wide.
ST5 Aisles between rows are at least 1,2 m wide.
ST6 Protection is only possible, when the system has been specifically fire tested for this
configuration.
The storage area shall be contained inside non-combustible or fire resistant walls.
Storage in movable racks and the storage of furniture or materials with expanded plastics are not
covered.
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
C.3 Storage requirements
The maximum storage height for stored goods follows Table C.2.
Table C.2 — Maximum storage height for stored goods
Stored goods Maximum storage height
Free-standing or All other cases
block storage
(ST1)
Non-combustible packaging with non-combustible 3,2 m 3,0 m
storage materials. Wooden pallets as a storage aid and
combustible edge protection not larger than 10 % of the
surface are permissible.
Storage materials of low or standard combustibility 2,8 m 2,6 m
such as wood, paper, cardboard, each in solid or
compact form. Packaging made of wood, paper,
cardboard or corrugated board with edge protection not
exceeding 10 % of the surface area. Wooden pallets are
permitted as storage aids.
Highly combustible storage materials. A plastic mass 1,7 m 1,7 m
proportion of up to 20 % is permissible. Packaging
made of wood, paper, cardboard or corrugated board
with edge protection not exceeding 10 % of the surface
are. Wooden pallets are permitted as storage aids.
Other storage materials, provided that the plastic mass 1,2 m 1,2 m
proportion does not exceed 40 %. Storage materials that
contain a high proportion of air, such as tissue paper or
pallets.
Packaging made of wood, paper, cardboard or
corrugated board with edge protection not exceeding
20 % of the surface area. Wooden pallets are permitted
as storage aids.
”.
4 Addition of new Annex D, “Limits of applicability for water mist systems tested
in accordance to EN 14972-3”
Add the following new Annex D:
“
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
Annex D
(normative)
Limits of applicability for water mist systems tested in accordance to
EN 14972-3
D.1 General
Systems tested according to EN 14972-3 are limited to the maximum ceiling height tested with a
minimum ceiling height of 2,0 m.
If the glass bulb temperature used in the fire test is less than 68 °C, the fire test protocol is only applicable
to that glass bulb temperature.
D.2 Regarding the scope of the water mist system
Table D.1 provides additional examples for which the water mist system tested in accordance to
EN 14972-3 can be applied.
Table D.1 — Examples for applicability
Without area Office areas Single and open-plan offices
restrictions
Counter areas
Restaurants and kitchens (excluding deep-fat
cooking fryer areas)
Rooms for data processing
Public areas in buildings with low fire load
Escape routes or other corridors
Training rooms
Churches
Museums
Other comparable risks
Technical/Plant/Mechanical rooms of low
fire load
Hotel areas Hotel rooms
Rooms in hospitals, care homes, homes for
the elderly
Apartments
Recreation areas
Other comparable risks
SIST EN 14972-1:2021/oprA1:2024
EN 14972-1:2020/prA1:2024 (E)
With area Store rooms (excluding flammable liquids, gases and other highly
restrictions flammable substances, sy
...
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