oSIST prEN 1366-9:2005

SLOVENSKI STANDARD
01-februar-2005
Preskusi požarne odpornosti servisnih napeljav - 9. del: Kanali za odvod dima iz
enega požarnega sektorja
Fire resistance tests for service installations - Part 9: Single compartment smoke
extraction ducts
Feuerwiderstandsprüfungen für Installationen - Teil 9: Entrauchungsleitungen für eine
Raumeinheit
Essais de résistance au feu des installations de service - Partie 9 : Conduits d'extraction
de fummée relatifs a un seul compartiment
Ta slovenski standard je istoveten z: prEN 1366-9
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2004
ICS
English version
Fire resistance tests for service installations - Part 9: Single
compartment smoke extraction ducts
Essais de résistance au feu des installations de service - Feuerwiderstandsprüfungen für Installationen - Teil 9:
Partie 9 : Conduits d'extraction de fummée relatifs à un Entrauchungsleitungen für eine Raumeinheit
seul compartiment
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 127.
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, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1366-9:2004: E
worldwide for CEN national Members.

Contents Page
Foreword. 3
1 Scope. 5
2 Normative references . 5
3 Terms and definitions. 5
4 Test equipment. 6
5 Test conditions. 9
6 Test specimen . 9
7 Installation of test specimen. 10
8 Conditioning . 11
9 Application of instrumentation. 11
10 Test procedure . 12
11 Performance criteria . 15
12 Test report . 15
13 Direct field of application of test results . 16
Annex A (informative) Surface temperature and volume/mass flow measurements . 28

Foreword
This document (prEN 1366-9:2004) has been prepared by Technical Committee CEN/TC 127 "Fire
safety in buildings", the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
Introduction
This part of this European standard has been prepared because a method of test for smoke extraction
ducts used in single compartment applications has become necessary. This test exposes a smoke
extraction duct to conditions intended to represent the pre-flashover stage of a fire.
Leakage is measured at both ambient temperature and exposure at 600 °C. During the tests,
air/gases are drawn through the duct at a differential pressure between the inside and outside of the
duct. Leakage is determined at ambient temperature by sealing the openings in the duct located in the
furnace and taking flow measurements through a flow measuring device located just before the
extraction fan. With respect to determining leakage at 600 °C, oxygen-measuring techniques are used.
CAUTION — The attention of all persons concerned with managing and carrying out this fire
resistance test is drawn to the fact that fire testing may be hazardous and that there is a possibility
that toxic and/or harmful smoke and gases may be evolved during the test. Mechanical and
operational hazards may also arise during the construction of the test elements or structures, their
testing and disposal of test residues.
An assessment of all potential hazards and risks to health shall be made and safety precautions shall
be identified and provided. Written safety instructions shall be issued. Appropriate training shall be
given to relevant personnel. Laboratory personnel shall ensure that they follow written safety
instructions at all times.
1 Scope
This method of EN 1366 specifies a test method for determining the fire resistance of smoke
extraction ducts that are used for single compartment applications only. In such applications, the
smoke extraction system is only intended to function up to flashover (typically 600 °C). The smoke
extraction duct is part of the smoke extraction system which also includes smoke control dampers and
smoke extract fans.
This test method of part 9 is applicable only to smoke extraction ducts that do not pass through into
other fire compartments. It represents fire exposure of a developing fire (pre-flashover).
For smoke extraction ducts that pass through into other compartments, the method of test described
in EN 1366-8 should be used.
This test has been designed to cover horizontal smoke extraction ducts intended for single
compartment applications only.
This method of test is only suitable for ducts constructed from non-combustible materials (euro
class A1).
It is applicable only to four sided ducts and two and three sided ducts are not covered.
The method described in this test is complex and requires sophisticated instrumentation. It is not
recommended therefore to try to test multiple assemblies in this test.
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.
EN 1363-1, Fire resistance tests — Part 1: General principles
EN 1366-1, Fire resistance tests for service installations — Part 1: Fire resisting ducts
EN 1366-8, Fire resistance tests for service installations — Part 8: Smoke extraction ducts
EN 1507, Ventilation for buildings — Ductwork — Rectangular sheet metal air ducts strengthened
leakage — requirements and testing
ISO 516,7, Measurement of fluid flow by means of orifice plates, nozzles and venturi tubes inserted in
circular cross-section conduits running full
ISO 5221, Air distribution and air diffusion — Rules to methods of measuring air flow rate in an air
handling duct
3 Terms and definitions
For the purposes of this part of this European Standard, the terms and definitions given in EN 1363-1
and ISO 13943 and the following apply.
3.1
single compartment smoke extraction duct
a duct used for the extraction of smoke up to a temperature of 600 °C from a single compartment to
outside a building without passing through another compartment.
3.2
smoke extraction duct for single compartments
a duct needed for the distribution or extraction of air or smoke
3.3
suspension devices
the components used for suspending and fixing a duct from a floor or supporting a duct from a wall
3.4
supporting construction
the wall or partition through which the duct passes in the test
3.5
fire zone
fire area of a single compartment building bounded by smoke curtains
3.6
smoke curtain
vertical barrier designed to contain hot gas layer to fire zone
4 Test equipment
4.1 General
In addition to the test equipment specified in EN 1363-1, the following is required.
4.2 Furnace
This shall be capable of subjecting fire resisting smoke extraction ducts to the heating and pressure
conditions specified in this standard and be suitable for testing ducts in the horizontal orientation
(Figure 1).
4.3 Perforated plate
The perforated plate controls the flow through the duct so that the required differential pressure, see
Table 1, can be achieved. Depending on the end-use conditions, a pressure level from Table 1 shall
be selected: These levels correspond to typical values used in smoke extraction design.
The plate shall be positioned 250 ± 50 mm from where the duct passes through the furnace wall
(see Figures 1 and 2).
These plates shall be made from heat resisting steel, 19 % min. Cr content and 11 % min. Ni content.
The number of holes and dimensions are given in Tables 2 and 3. The thickness of the plates shall be
2,5 mm.
NOTE 1 Table 2 gives details of perforated plates for standard rectangular ducts of size 1000 mm x 250 mm.
For smaller sizes, the number of holes will be reduced proportional to the smaller cross-section.
NOTE 2 Table 3 gives details of perforated plates for standard circular ducts of diameter 560 mm. For smaller
sizes, the number of holes will be reduced proportional to the cross-section (a change to larger sizes is not
accepted; see 6.1.2 and Table 5).
Further details of the plate are shown in Figures 3, 4 and 5.
Table 1 — Differential pressures between inside and outside the duct for smoke extraction
ductwork
Pressure Level*) Operating differential pressure at Differential pressure for the
ambient temperature fire test and pre-test calibration
Pa Pa
1 -500 -150
2 -1000 -300
3 -1500 -500
Table 2 — Details of perforated plates for testing rectangular ducts (see Figure 3)
Pressure level*)
Specification for perforations
1 2 3
Total number of holes 550 407 324
Number of holes - horizontally 50 37 36
Number of holes - vertically 11 11 9
Diameter of hole (mm) 10 10 10
Horizontal distance from rim e (mm) 15 15 20
Vertical distance from rim c (mm) 15 15 20
Mounting hole separation a (mm) 19,8 26,9 27,4
Mounting hole separation b (mm) 21,8 22 26,3

Table 3 — Details of perforated plate for testing circular ducts (see Figure 4)
a)
Pressure level
Specification for perforations
1 2 3
Total number of holes 541 403 319
Diameter of hole (mm) 10 10 10
Horizontal distance from rim e (mm) 30 35 35
Mounting hole separation a (mm) 20,8 22,2 27,5
Mounting hole separation b (mm) 20,8 22,2 27,5
a)
see clause 5
4.4 Inlet nozzles (fire test)
Each nozzle shall have an internal dimension of 160 mm (see Figure 10, suitable for the standard size
of duct specified in 6.1) in accordance with ISO 5167/ISO 5221 and shall be suitably mounted to the
end of the duct with its piezometric ring connected to appropriate differential pressure measuring
equipment. The measuring device shall be capable of measuring to an accuracy of ± 5 %.
4.5 Ambient leakage measuring device
These shall be in accordance with ISO 5167/ISO 5221 and suitably mounted to the end of the duct,
connected to appropriate differential pressure measuring equipment. The measuring device shall be
capable of measuring to an accuracy of ± 5 %.
4.6 Pressure sensors for differential pressure control
A tube sensor as specified in EN 1363-1 shall be located at the end of the duct, inside the duct, at the
level of its centre line. A second sensor (e.g. an open end of a measuring tube) shall be located on
the same level outside the duct differential pressure fine control device.
A flow control damper shall be provided for a fine control for maintaining the required differential
pressure. Alternatively, another suitable device such as a variable speed fan may be used. Any flow
control damper shall be attached to the extract fan connecting duct (see 4.8).
4.7 Welded connecting tube
A welded connecting tube is a tube designed to provide a suitable gas tight connection between the
inlet nozzles and the oxygen measuring probes.
4.8 Extract fan connecting duct
An extract fan conne
...