Fixed firefighting systems - Components for gas extinguishing systems - Part 7: Requirements and test methods for nozzles

This document specifies requirements and test methods for room protection nozzles which introduce CO2, inert gas or halocarbon gas into a protected zone. The design of the nozzles will influence discharge rate and thus the pressure drop in the piping network. This standard is not applicable to local application nozzles.

Ortsfeste Brandbekämpfungsanlagen - Bauteile für Löschanlagen mit gasförmigen Löschmitteln - Teil 7: Anforderungen und Prüfverfahren für Düsen

Installations fixes de lutte contre l'incendie - Éléments constitutifs des installations d'extinction à gaz - Partie 7 : Exigences et méthodes d'essai pour diffuseurs

Vgrajeni gasilni sistemi – Sestavni deli sistemov za gašenje s plinom - 7. del: Zahteve in preskusne metode za šobe

General Information

Status
Not Published
Current Stage
3098 - Decision to reject - Consensus building
Due Date
07-Aug-2009
Completion Date
07-Aug-2009

RELATIONS

Buy Standard

Draft
prEN 12094-7:2006
English language
33 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI oSIST prEN 12094-7:2006
PREDSTANDARD
marec 2006
Vgrajeni gasilni sistemi – Sestavni deli sistemov za gašenje s plinom – 7. del:
Zahteve in preskusne metode za šobe
Fixed firefighting systems – Components for gas extinguishing systems – Part 7:
Requirements and test methods for nozzles
ICS 13.220.10 Referenčna številka
oSIST prEN 12094-7:2006(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
DRAFT
prEN 12094-7
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2006
ICS 13.220.10; 13.220.20 Will supersede EN 12094-7:2000
English Version
Fixed firefighting systems - Components for gas extinguishing
systems - Part 7: Requirements and test methods for nozzles

Installations fixes de lutte contre l'incendie - Éléments Ortsfeste Brandbekämpfungsanlagen - Bauteile für

constitutifs des installations d'extinction à gaz - Partie 7 : Löschanlagen mit gasförmigen Löschmitteln - Teil 7:

Exigences et méthodes d'essai pour diffuseurs Anforderungen und Prüfverfahren für Düsen

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 Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,

Slovakia, Slovenia, Spain, Sweden, Switzerland 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.

: This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and

Warning
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12094-7:2006: E

worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
prEN 12094-7:2006 (E)
Contents Page

Foreword..............................................................................................................................................................4

Introduction .........................................................................................................................................................5

1 Scope ......................................................................................................................................................5

2 Normative references ............................................................................................................................5

3 Terms and definitions ...........................................................................................................................6

4 Requirements.........................................................................................................................................7

4.1 General design.......................................................................................................................................7

4.2 Connection threads ...............................................................................................................................7

4.3 Nozzle opening cross section ..............................................................................................................8

4.4 Nozzle protection device.......................................................................................................................8

4.5 Flow rate .................................................................................................................................................8

4.6 Distribution characteristics ..................................................................................................................9

4.7 Resistance to pressure and heat .........................................................................................................9

4.8 Resistance to heat and cold shock for CO and halocarbon gas nozzles.......................................9

4.9 Resistance to corrosion........................................................................................................................9

4.10 Resistance to stress corrosion ............................................................................................................9

4.11 Resistance to vibration .........................................................................................................................9

4.12 Documentation.......................................................................................................................................9

5 Type test methods ...............................................................................................................................10

5.1 Conditions ............................................................................................................................................10

5.2 Samples and order of tests.................................................................................................................10

5.3 Compliance...........................................................................................................................................11

5.4 Determination of distribution characteristics...................................................................................11

5.5 Verification of flow rate .......................................................................................................................15

5.6 Test for resistance to pressure and heat ..........................................................................................16

5.7 Test for resistance to heat and cold shock for CO and halocarbon gas nozzles........................16

5.8 Nozzle protection device.....................................................................................................................17

5.9 Test for resistance to corrosion.........................................................................................................17

5.10 Test for resistance to stress corrosion .............................................................................................17

5.11 Test for resistance to vibration ..........................................................................................................17

6 Marking .................................................................................................................................................18

7 Evaluation of conformity.....................................................................................................................18

7.1 General..................................................................................................................................................18

7.2 Initial type testing ................................................................................................................................18

7.3 Factory production control (FPC) ......................................................................................................19

Annex A (normative) Nozzle distribution verification test procedure for inert and halocarbon

gases.....................................................................................................................................................23

A.1 Principle................................................................................................................................................23

A.2 Test arrangement.................................................................................................................................24

A.3 Flooding mass......................................................................................................................................24

A.4 Series of nozzles with same design and different flow rates..........................................................24

A.5 Nozzles minimum height / maximum area coverage test................................................................25

A.5.1 Test facility ...........................................................................................................................................25

A.5.2 Instrumentation....................................................................................................................................26

A.5.3 Fuel specification.................................................................................................................................27

A.5.4 Test procedure.....................................................................................................................................27

A.6 Nozzles maximum height test ............................................................................................................28

---------------------- Page: 3 ----------------------
prEN 12094-7:2006 (E)

A.7 Determination of distribution performance of the nozzle ...............................................................28

Annex ZA (informative) Clauses of this European Standard addressing the provisions of the

Construction Products Directive .......................................................................................................29

ZA.1 Scope and relevant characteristics ...................................................................................................29

ZA.2 Procedure for the attestation of conformity of nozzles...................................................................30

ZA.2.1 Systems of attestation of conformity................................................................................................30

ZA.2.2 Certificate and Declaration of conformity.........................................................................................30

ZA.3 CE marking and labelling....................................................................................................................31

Bibliography......................................................................................................................................................33

---------------------- Page: 4 ----------------------
prEN 12094-7:2006 (E)
Foreword

This document (prEN 12094-7:2006) 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.
This document will supersede EN 12094-7:2000.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

This document is part of a series concerned with gas extinguishing system components.

The following European Standards are planned to cover:
 gas extinguishing systems (EN 12094)
 sprinkler systems (EN 12259 and EN 12845)
 powder systems (EN 12416)
 explosion protection systems (EN 26184)
 foam systems (EN 13565)
 hose systems (EN 671)
 smoke and heat control systems (EN 12101)
 water spray systems (EN 14816)

This European Standard has the general title "Fixed firefighting systems – Components for gas extinguishing

systems" and will consist of the following parts:

 Part 1: Requirements and test methods for electrical automatic control and delay devices

 Part 2: Requirements and test methods for non-electrical automatic control and delay devices

 Part 3: Requirements and test methods for manual triggering and stop devices

 Part 4: Requirements and test methods for container valve assemblies and their actuators

 Part 5: Requirements and test methods for high and low pressure selector valves and their actuators

 Part 6: Requirements and test methods for non electrical disable devices
 Part 7: Requirements and test methods for nozzles
 Part 8: Requirements and test methods for connectors
---------------------- Page: 5 ----------------------
prEN 12094-7:2006 (E)
 Part 9: Requirements and test methods for special fire detectors

 Part 10: Requirements and test methods for pressure gauges and pressure switches

 Part 11: Requirements and test methods for mechanical weighing devices
 Part 12: Requirements and test methods for pneumatic alarm devices
 Part 13: Requirements and test methods for check valves and non-return valves

 Part 16: Requirements and test methods for odorizing devices for CO low pressure systems

 Part 17: Requirements and test methods for pipe hangers
 Part 20: Requirements and test methods for the compatibility of components
Introduction

It has been assumed in the preparation of this Standard that the execution of its provisions is entrusted to

appropriately qualified and experienced people.

All pressure data in this document are given as gauge pressures in bar, unless otherwise stated.

5 -2
NOTE 1 bar = 10 N m = 100 kPa.
1 Scope

This document specifies requirements and test methods for room protection nozzles which introduce CO ,

inert gas or halocarbon gas into a protected zone.

The design of the nozzles will influence discharge rate and thus the pressure drop in the piping network.

This standard is not applicable to local application nozzles.
2 Normative references

The following referenced documents are indispensable for the application 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.

ISO 7-1, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances

and designation

EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,

tolerances and designation
EN ISO 9001:2000, Quality management systems – Requirements (ISO 9001:2000)

ISO 14520 (all Parts), Gaseous fire-extinguishing systems – Physical properties and system design

---------------------- Page: 6 ----------------------
prEN 12094-7:2006 (E)
3 Terms and definitions
For the purposes of this document the following terms and definitions apply.
3.1
CO -high-pressure installation

fire extinguishing installation in which the CO is stored at ambient temperature. For example, the pressure of

the CO in storage is p = 58,6 bar at 21 °C
2 abs
3.2
CO -low-pressure installation

fire extinguishing installation in which the CO is stored at low temperature, normally –19 °C to –21 °C

3.3
cross section
total area of all smallest geometrical single areas
3.4
distribution characteristics
volume in which the extinguishant is distributed uniformly from a nozzle
3.5
filter
a component to prevent blockage of nozzles
3.6
flow rate
mass flow of extinguishant against time
3.7
functional reliability
ability of function under different working conditions
3.8
halocarbon gas

extinguishant which contains as primary components one or more organic compounds containing one or more

of the elements fluorine, chlorine, bromine or iodine
3.9
halocarbon gas installation

fire extinguishing installation in which the halocarbon gas is stored at ambient temperature

3.10
inert gas

non liquefied gas or mixture of gases which extinguishes the fire mainly by reducing the oxygen-concentration

in the protected zone, e.g. Argon, Nitrogen or CO or mixtures of these gases
3.11
inert gas installation

fire extinguishing installation in which the inert gas is stored at ambient temperature

3.12
nozzle

component to achieve a predetermined flow rate and a uniformed distribution characteristic of the

extinguishant into or onto a protected hazard
---------------------- Page: 7 ----------------------
prEN 12094-7:2006 (E)
3.13
nozzle efficiency factor

nozzle specific ratio between the real storage mass and the theoretical storage mass based on the

extinguishing concentration
3.14
nozzle protection device
component to protect nozzles against exterior dirt
3.15
resistance coefficient

value for the calculation of the pressure drop in a component under flow condition

3.16
room protection nozzle

nozzle, from which extinguishant is discharged for distribution throughout an enclosure

3.17
working pressure
pressure at which the component is used in the system
4 Requirements
4.1 General design

4.1.1 The test sample shall comply to the technical description (drawings, parts list, description of functions,

operating and installation instructions) when checked in accordance with 5.3.

Metal parts of the component shall be made of corrosion resistant materials, e.g. stainless steel, copper,

copper alloy or corrosion-protected steel (e.g. galvanized steel).

4.1.2 For CO nozzles, the manufacturer shall specify the type of system (CO -low pressure and/or CO -

2 2 2
high pressure).

4.1.3 For inert gas nozzles, the manufacturer shall specify the working pressure and the minimum nozzle

pressure.
4.1.4 For halocarbon gas nozzles, the manufacturer shall specify:
a) the type of system (halocarbon gas and storage pressure at + 20 °C); and
b) the working pressure; and
c) the minimum nozzle pressure.
4.2 Connection threads

Connection threads shall comply with National Standards, European Standards or International Standards, e.g.

ISO 7-1 and EN ISO 228-1.

NOTE For the purpose of this sub-clause, the term "International" means also "internationally recognized".

---------------------- Page: 8 ----------------------
prEN 12094-7:2006 (E)
4.3 Nozzle opening cross section

The minimum dimension of any individual discharge opening of the nozzle shall not be smaller than 1 mm.

Nozzles with dimension of discharge opening ≥ 3 mm shall not be equipped with a filter. Nozzles with

dimensions of discharge openings < 3 mm shall be equipped with a filter.

The filter shall be made of corrosion resistant metal. The unrestricted filter surface area shall be at least five

times the nozzle cross section. The mesh of the filter shall be between 0,5 mm and 0,8 mm, measured in the

plane of the hole.

To prevent blockage of the nozzle by solid-phase particles the cross sectional area of the nozzle should

decrease in the direction of flow. Orifice plates are not allowed in nozzles for extinguishants which can partly

change to solid phase, except where blockage of downstream flow paths/orifices by solid-phase particles is

prevented by the design of the nozzle.
4.4 Nozzle protection device

If the nozzle opening is protected against exterior dirt with a cap or similar cover, this protection device shall

eject clear of the nozzle's full opening cross section at a test pressure between 0,1 bar and 3 bar when tested in

accordance with 5.8. The protection device shall not affect extinguishant distribution.

4.5 Flow rate

4.5.1 For CO nozzles the manufacturer shall specify the information which describes the flow rate of the

nozzle in kilograms medium per second as follows:

a) in the pressure range from 10 bar to 18 bar depending on storage pressure at storage temperature -20 °C

for CO -low pressure;

b) in the pressure range from 14 bar to 50 bar depending on storage pressure at storage temperature

+ 20 °C for CO -high pressure.

The flow characteristics figures given by the manufacturer shall be within ± 10 % of the value(s) determined in

accordance with 5.5.2.

Where filters are installed, these shall be taken into account when determining the flow rate.

4.5.2 For inert gas nozzles the manufacturer shall specify the information which describes the flow rate of

the nozzle in kilograms medium per second in the pressure range from 2 bar to the working pressure and in

the temperature range from – 20 °C to + 20 °C.

The flow characteristics figures given by the manufacturer shall be within ± 10 % of the value(s) determined in

accordance with 5.5.3.

Where filters are installed, these shall be taken into account when determining the flow rate.

4.5.3 For halocarbon gas nozzles the manufacturer shall specify the information which describes the flow

rate of the nozzle in kilograms medium per second in the pressure range from the minimum nozzle pressure

to 1 bar below the storage pressure depending on storage pressure at + 20 °C.

The flow characteristics figures given by the manufacturer shall be within ± 10 % of the value(s) determined in

accordance with 5.5.4.

Where filters are installed, these shall be taken into account when determining the flow rate.

---------------------- Page: 9 ----------------------
prEN 12094-7:2006 (E)
4.6 Distribution characteristics

4.6.1 For CO nozzles, the distribution of extinguishant shall be tested in accordance with 5.4.2.

4.6.2 For inert gas nozzles, the distribution of extinguishant shall be tested in accordance with 5.4.3 or in

accordance with Annex A.

4.6.3 For halocarbon gas nozzles, the distribution of extinguishant shall be tested in accordance with 5.4.4

or in accordance with Annex A.
4.7 Resistance to pressure and heat

The nozzles shall be able to withstand the test pressures and temperatures given in Table 1.

Table 1 — Test pressure and temperature
Type of system Test pressure Test temperature
bar °C
High-pressure CO 60 600
Low-pressure CO 25 600
Inert gas working pressure 600
Halocarbon gas working pressure 600

Following testing for pressure and heat resistance in accordance with 5.6, the nozzles shall show no signs of

deterioration which could impair proper performance.
4.8 Resistance to heat and cold shock for CO and halocarbon gas nozzles

The nozzles shall withstand both the high temperatures generated during a fire and the cold shock caused by

the extinguishant as it is discharged. Following testing for heat and cold shock resistance in accordance with 5.7,

the nozzles shall show no signs of deterioration which could impair proper functioning.

4.9 Resistance to corrosion

The performance of the nozzles shall not be adversely affected as a result of the corrosion test in accordance

with 5.9.
4.10 Resistance to stress corrosion

Any copper alloy part used in nozzles shall not crack, when tested in accordance with 5.10.

4.11 Resistance to vibration

Nozzles assembled from several parts shall not be damaged, when tested in accordance with 5.11.

4.12 Documentation
4.12.1 The manufacturer shall prepare and maintain documentation.

4.12.2 The manufacturer shall prepare installation and user documentation, which shall be submitted to the

testing authority together with the sample(s). This documentation shall comprise at least the following:

---------------------- Page: 10 ----------------------
prEN 12094-7:2006 (E)

a) a general description of the component, including a list of its features and functions;

b) a technical specification including:
1) the information mentioned in 4.1;

2) sufficient information to permit an assessment of the compatibility with other components of the

system (if applicable e.g. mechanical, electrical or software compatibility);
c) installation instructions including mounting instructions;
d) operating instructions;
e) maintenance instructions;
f) routine testing instructions if appropriate.

4.12.3 The manufacturer shall prepare design documentation, which shall be submitted to the testing

authority together with the sample(s). This documentation shall include drawings, parts lists, block diagrams (if

applicable), circuit diagrams (if applicable) and a functional description to such an extent that compliance with

this document can be checked and that a general assessment of the design is possible.

5 Type test methods
5.1 Conditions

The components shall be assembled for test as specified in the technical description. The tests shall be

carried out at a temperature of (25 ± 10) °C, except when otherwise specified for a particular test.

The tolerance for all test parameters is 5 %, unless otherwise stated.
5.2 Samples and order of tests

When testing a nozzle type with only one size, four test samples are necessary. The order of tests is shown in

Table 2.
Table 2 — Order of tests
Test methods Order of tests for
Sample A Sample B Sample C Sample D
5.3 Compliance 1 1 1 1
5.4 Determination of distribution characteristics 2
  
5.5 Determination of flow rate 2/4
  
5.6 Test for resistance to pressure and heat 2
  
5.7 Test for resistance to heat and cold shock 3
  
5.8 Nozzle protection device 2
  
5.9 Test for resistance to corrosion 3
  
5.10 Test for resistance to stress corrosion 3
  
5.11 Vibration test 3
  
---------------------- Page: 11 ----------------------
prEN 12094-7:2006 (E)

When testing a series of nozzles, where the nozzles are of identical design with the exception of their size (cross

section of discharge opening), the following test samples are necessary:
 2 test samples of smallest size,
 1 test sample of medium size,
 2 test samples of largest size,
 1 or more test samples of a size agreed with the testing authority.

NOTE By this agreement, the dimensions of already available test rooms for test 5.4 may be taken into account.

The order of tests for this case shall be as follows:
 First test sample of smallest size: as test sample A of Table 2.
 Second test sample of smallest size: as test sample D of Table 2.
 Test sample of medium size: as test sample A of Table 2 without tests 3 and 4.

 First test sample of largest size: as test sample A of Table 2 without tests 3 and 4.

 Second test sample of largest size: as test sample B of Table 2.

 Test sample(s) of the size agreed with the testing authority: as test sample C of Table 2.

5.3 Compliance
This test relates to the requirement of 4.1.

A visual and measurement check shall be made to determine whether the nozzles correspond to the description

in the technical literature (drawings, parts lists, description of function, operating and installation instruction).

5.4 Determination of distribution characteristics
5.4.1 General
This test relates to the requirement of 4.6.
5.4.2 CO -Nozzles

For testing the distribution characteristics with one or more nozzles in a test room the following test conditions

shall be set-up:

a) test room: area 30 m ± 30% with a relation of length to width of (1 -0/+1), height 5 m ± 30%, volume

150 m ± 20%
b) pressure in the CO supply container: (20 ± 1) bar;
c) pressure at the nozzle: (13 ± 2) bar;
d) flow rate: (1 ± 0,1) kg/m referenced to the volume of the test room;

e) gaseous phase time maximum 10 s. The mass flow during this time shall not exceed 10 % of the mass of

the liquid phase;
---------------------- Page: 12 ----------------------
prEN 12094-7:2006 (E)

f) liquid phase time (60 ± 5) s. The CO supply shall be shut down immediately after this period.

Concentration measurements shall be made to determine whether the CO is distributed evenly in the volume

served by the nozzle(s). The deviation of the concentration of the different measuring points shall be at

maximum five percentage points (60 ± 10) s after the end of the discharge. The test set-up is shown in Figure 1.

The test room shall be equipped with a pressure relief opening in the ceiling or near the ceiling. The pressure

relief opening shall be closed when the flooding mass has been discharged.

A visual check shall be made, to ensure that no significant quantity of CO "dry-ice" is present in the test room

15 min after the conclusion of testing.
---------------------- Page: 13 ----------------------
prEN 12094-7:2006 (E)
a) front view of the test room b) side view of the test room
c) top view of the test room
Key
p pressure measuring point
m mass measuring point
h room height, in metres
b width of room according to the flow rate of nozzle, in metres
l length of room according to the flow rate of nozzle, in metres
M to M concentration measuring points 1 to 6
1 6
Arrangement for concentration measuring points:
 height above floor
M ; M: 0,1 × h
1 6
M ; M: 0,5 × h
2 5
M ; M: 0,9 × h
3 4
 distance from walls
M , M , M and M: 0,1 × l from wall of length b and 0,1 × b from wall of length l
1 2 3 4
M and M: 0,5 × l from wall of length b and 0,1 × b from wall of length l.
2 5
Figure 1 — Test configuration for CO room protection nozzles
---------------------- Page: 14 ----------------------
prEN 12094-7:2006 (E)
5.4.3 Inert gas nozzles
The tests may be done using any Inert gas or gaseous CO .

For testing the distribution characteristic with one or more nozzles in a test room the following test conditions

shall be set up:
2 2

a) test room: area 30 m ± 9 m with a relation of length to width of 1:2, height 5 m ± 1,5 m, volume

3 3
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.