prEN 12845-1

SLOVENSKI STANDARD
01-februar-2022
Vgrajene naprave za gašenje - Avtomatski sprinklerski sistemi - 1. del:
Projektiranje, vgradnja in vzdrževanje
Fixed firefighting systems - Automatic sprinkler systems - Part 1: Design, installation and
maintenance
Ortsfeste Brandbekämpfungsanlagen - Automatische Sprinkleranlagen - Planung,
Installation und Instandhaltung
Installations fixes de lutte contre lincendie - Systèmes dextinction automatique du type
sprinkleur - Conception, installation et maintenance
Ta slovenski standard je istoveten z: prEN 12845-1
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 13.220.20 Will supersede EN 12845:2015+A1:2019
English Version
Fixed firefighting systems - Automatic sprinkler systems -
Part 1: Design, installation and maintenance
Installations fixes de lutte contre l¿incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen - Automatische
d¿extinction automatique du type sprinkleur - Sprinkleranlagen - Planung, Installation und
Conception, installation et maintenance Instandhaltung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 191.
If this draft becomes a European Standard, 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.

This draft European Standard 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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12845-1:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 6
Introduction . 8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 13
3.1 Terms and definition . 13
3.2 Symbols and abbreviated terms . 31
4 Contract planning and documentation . 32
4.1 General . 32
4.2 Design stage . 32
5 Extent of protection . 38
5.1 General . 38
5.2 Allowed exception of automatic sprinkler protection within a building . 38
5.3 Areas where sprinklers shall not be installed . 38
5.4 Exposure protection of buildings . 38
5.5 Fire resistant separation . 39
6 Fire hazard classification methodology system. 39
6.1 General . 39
6.2 Classification methodology . 39
7 Construction features influencing fire hazards of storage and non-storage
occupancies . 40
8 Fire hazard classification of storage occupancies . 43
8.1 General . 43
8.2 Categorisation of goods . 44
8.3 Storage configurations . 45
9 Fire hazard classification for non-storage buildings . 52
9.1 General . 52
9.2 Fire hazard classification for a non–manufacturing building . 53
9.3 Fire hazard classification for manufacturing activities . 58
10 Hydraulic design criteria . 63
10.1 General . 63
10.2 Compartment design approach . 63
10.3 FH1, FH2, FH3, FH4 and FH5 . 64
10.4 High hazard storage - HHS . 64
11 Protection of special hazards . 68
11.1 General . 68
11.2 Aerosol containers . 68
11.3 Clothes in multiple-rack hanging garment storage . 73
11.4 Flammable liquid storage . 75
11.5 Storage in open top containers . 86
11.6 Automatic car stackers . 87
11.7 Special requirements for buildings with residential occupancies . 89
11.8 Special requirements for high rise systems . 89
11.9 Extended coverage sprinklers for storage and non-storage application . 93
12 Pipe sizing, layout and hydraulic calculations . 106
12.1 Pipe sizing . 106
12.2 Calculation of pressure losses in pipework . 106
12.3 Fully calculated systems . 109
13 Sprinkler system components . 115
14 Installation type and size . 116
14.1 Wet pipe installation . 116
14.2 Dry pipe installations . 122
14.3 Pre-action installations . 125
15 Spacing and location of sprinklers . 129
15.1 General . 129
15.2 Vertical clearance below sprinklers . 129
15.3 Installation of sprinklers . 129
15.4 Maximum area of coverage per sprinkler. 130
15.5 Minimum distance between sprinklers . 132
15.6 Location of sprinklers in relation to building construction . 132
15.7 In-rack sprinklers . 140
16 Sprinkler design characteristics and uses . 145
16.1 General . 145
16.2 Sprinkler types and application . 145
16.3 Flow from sprinklers . 146
16.4 Sprinkler nominal operating temperature . 146
16.5 Sprinkler thermal sensitivity . 147
16.6 Sprinkler guards . 149
16.7 Sprinkler water shields . 149
16.8 Sprinkler rosettes . 150
16.9 Corrosion protection of sprinklers . 150
17 Valves . 150
17.1 Alarm valve set . 150
17.2 Stop valves . 151
17.3 Ring main valves . 151
17.4 Drain valv
...