oSIST prEN 1366-1:2008

Fire resistance tests for service installations - Part 1: Ducts

To revise this part of EN 1366 which specifies a test method for determining the fire resistance of ducts.

Feuerwiderstandsprüfungen für Installationen - Teil 1: Leitungen

Dieser Teil von EN 1366 beschreibt ein Verfahren für die Ermittlung der Feuerwiderstandsdauer von
vertikalen und horizontalen Leitungen einschließlich der Zugangsklappen, die ein fester Bestandteil der zu
prüfenden Leitungen/Wandungen der Leitung sind. Die Prüfung untersucht das Verhalten von Leitungen, die
einem Brand von außen (Leitung A) und einem Brand innerhalb der Leitung (Leitung B) ausgesetzt sind.
Diese Norm gilt in Verbindung mit EN 1363-1.
Anhang A enthält eine allgemeine Anleitung und führt Hintergrundinformationen auf.
Diese Europäische Norm gilt nicht für:
a) Leitungen, deren Feuerwiderstandsfähigkeit von der Feuerwiderstandsfähigkeit einer Decke abhängig ist;
b) Leitungen, die an den Durchführungsstellen von raumabschließenden Bauteilen Brandschutzklappen
enthalten;
c) Zugangsklappen, die unabhängig von den zu prüfenden Leitungen/Wandungen der Leitung beurteilt
werden;
d) zwei- oder dreiseitige Leitungen;
e) Befestigungsmittel von Abhängevorrichtungen an Decken oder Wänden.
Für die Beurteilung von Brandschutzklappen wird auf EN 1366-2 verwiesen.
Für die Beurteilung von Entrauchungsleitungen wird auf EN 1366-8 verwiesen.
Für die Beurteilung von Installationskanälen und -schächten wird auf prEN 1366-5 verwiesen.

Essais de résistance au feu des installations techniques - Partie 1: Conduits

La présente partie de l’EN 1366 prescrit une méthode de détermination de la résistance au feu des
conduits de ventilation horizontaux et verticaux, y compris les trappes de visite, qui font partie
intégrante des parois du conduit/des conduits soumis à essai. L'essai examine le comportement des
conduits exposés au feu de l'extérieur (conduit A) et de l'intérieur (conduit B). La présente norme est
utilisée avec l’EN 1363-1.
L'Annexe A fournit les lignes directives générales et donne des éléments de base.
La présente Norme européenne n’est pas applicable :
a) aux conduits dont la résistance au feu dépend de celle d’un plafond ;
b) aux conduits comportant des clapets résistant au feu aux points de traversée de séparation
résistant au feu ;
c) aux trappes de visite, dont la résistance au feu est évaluée indépendamment des parois du (des)
conduits soumis à essai ;
d) aux conduits à deux ou trois côtés ;
e) aux fixations des dispositifs de suspension sur les planchers ou les murs.
Pour l’évaluation des clapets résistant au feu, voir l'EN 1366-2.
Pour l’évaluation des conduits d'extraction de fumées, voir l'EN 1366-8.
Pour l’évaluation des gaines pour installations techniques, voir le prEN 1366-5.

Preskusi požarne odpornosti servisnih inštalacij - 1. del: Kanali

General Information

• Status: Not Published
• Public Enquiry End Date: 14-Jan-2009
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• ICS: 91.060.40 - Chimneys, shafts, ducts
• Technical Committee: POZ - Požarna varnost
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 11-Oct-2013
• Due Date: 16-Oct-2013
• Completion Date: 11-Oct-2013
• Directive: 89/106/EEC - Construction products
• Mandate: M/BC/CEN/91/9 - CPD: Fire resistance
• Ref Project: prEN 1366-1 - Fire resistance tests for service installations - Part 1: Ventilation ducts

Relations

• Revised: SIST EN 1366-1:1999 - Fire resistance tests for service installations - Part 1: Ducts
• Effective Date: 01-Dec-2008
• Revised: SIST EN 1366-1:1999 - Fire resistance tests for service installations - Part 1: Ducts
• Effective Date: 18-Jan-2023
• Revised: SIST EN 1366-1:1999 - Fire resistance tests for service installations - Part 1: Ducts
• Effective Date: 19-Jan-2023
• Revised: SIST EN 1366-1:1999 - Fire resistance tests for service installations - Part 1: Ducts
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 1366-1:2008
01-december-2008
Preskusi požarne odpornosti servisnih inštalacij - 1. del: Kanali
Fire resistance tests for service installations - Part 1: Ducts
Feuerwiderstandsprüfungen für Installationen - Teil 1: Leitungen
Essais de résistance au feu des installations techniques - Partie 1: Conduits
Ta slovenski standard je istoveten z: prEN 1366-1
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
oSIST prEN 1366-1:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1366-1:2008

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oSIST prEN 1366-1:2008
EUROPEAN STANDARD
DRAFT
prEN 1366-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2008
ICS 13.220.50 Will supersede EN 1366-1:1999
English Version
Fire resistance tests for service installations - Part 1: Ducts
Essais de résistance au feu des installations techniques - Feuerwiderstandsprüfungen für Installationen - Teil 1:
Partie 1: Conduits Leitungen
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 CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
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
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1366-1:2008: E
worldwide for CEN national Members.

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oSIST prEN 1366-1:2008
prEN 1366-1:2008 (E)
Contents Page
Foreword. 4
Introduction . 5
1 Scope. 6
2 Normative references. 6
3 Definitions. 7
4 Test equipment. 7
4.1 General. 7
4.2 Furnace. 7
4.3 Fan A. 8
4.4 Fan B. 8
4.5 Volume flow measuring station. 8
4.6 Condensing unit. 8
4.7 Damper. 8
4.8 Velocity measuring station. 8
4.9 Equipment for measuring gas pressure. 8
4.10 Thermal movement measuring device. 8
5 Test conditions. 9
6 Test specimen. 9
6.1 Size. 9
6.1.1 General. 9
6.1.2 Length. 9
6.1.3 Cross-section. 9
6.2 Number. 10
6.3 Design. 10
6.3.1 General. 10
6.3.2 Minimum separation. 10
6.3.3 Configuration of duct A (horizontal only). 10
6.3.4 Openings in duct B . 10
6.3.5 Access panel. 11
6.3.6 Joints in horizontal ducts. 11
6.3.7 Joints in vertical ducts . 11
6.3.8 Support for vertical ducts . 11
6.3.9 Compensators. 11
6.3.10 Steel ducts. 11
7 Installation of test specimen. 12
7.1 General. 12
7.2 Standard supporting construction. 12
7.3 Non-standard supporting constructions. 13
7.4 Fire stopping. 13
7.5 Unsupported vertical ducts . 13
8 Conditioning. 13
8.1 General. 13
8.2 Water-based sealing materials. 13
9 Application of instrumentation. 14
9.1 Thermocouples. 14
9.1.1 Furnace thermocouples (plate thermometers) .14
9.1.2 Unexposed surface thermocouples. 14
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prEN 1366-1:2008 (E)
9.2 Pressure. 14
10 Test procedure. 15
10.1 General. 15
10.2 Control of conditions to permit assessment of integrity. 15
10.2.1 Duct A. 15
10.2.2 Duct B. 15
10.3 Test measurements and observations . 15
10.3.1 Integrity. 15
10.3.2 Insulation. 17
10.3.3 Additional observations. 17
10.4 Termination of the test . 17
11 Performance criteria. 17
11.1 Integrity. 17
11.2 Insulation. 17
11.2.1 General. 17
11.2.2 Duct with combustible lining . 17
11.3 Smoke Leakage. 18
12 Test report. 18
13 Field of direct application of test results. 18
13.1 General. 18
13.2 Vertical and horizontal ducts. 18
13.3 Sizes of ducts . 19
13.4 Pressure difference. 19
13.5 Height of vertical ducts . 19
13.5.1 Ducts supported at each storey . 19
13.5.2 Self load-bearing ducts . 19
13.5.3 Limitations on buckling. 20
13.6 Suspension devices for horizontal ducts. 20
13.7 Supporting construction. 21
13.8 Steel ducts. 21
13.9 Ducts with boards. 21
13.10 Fire stopping. 21
Annex A (informative) General guidance . 22
A.1 General. 22
A.2 Notes on apparatus. 22
A.2.1 Volume flow measuring station. 22
A.2.2 Extraction fan. 22
A.3 Notes on test specimens. 22
A.3.1 Design. 22
A.3.2 Thermal elongation and shortening. 23
A.4 Notes on test conditions . 23
A.4.1 Temperature-time development. 23
A.4.2 Anticipated pressure ranges. 23
A.5 Notes on procedure . 24
A.5.1 Air velocity in duct B . 24
A.5.2 Evaluation of duct in overpressure conditions . 24
A.5.3 Insulation and integrity. 24
A.6 Notes on performance criteria. 24

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oSIST prEN 1366-1:2008
prEN 1366-1:2008 (E)
Foreword
This document (prEN 1366-1:2008) 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.
This document will supersede EN 1366-1:1999.
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 89/106/EEC and of the
Construction Product Directive.
EN 1366 “Fire resistance tests for service installations” consists of the following:
Part 1: Ducts
Part 2: Fire dampers
Part 3: Penetration seals
Part 4: Linear joint seals (in course of preparation)
Part 5: Service ducts and shafts (in course of preparation)
Part 6: Raised floors (in course of preparation)
Part 7: Closures for conveyors and trackbound transportation systems (in course of preparation)
Part 8: Smoke extraction ducts
Part 9: Single compartment smoke extraction ducts (in course of preparation)
Part 10: Smoke control dampers (in course of preparation)

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oSIST prEN 1366-1:2008
prEN 1366-1:2008 (E)
Introduction
The purpose of this test is to measure the ability of a representative duct section or duct assembly
that is part of an air distribution system to resist the spread of fire from one fire compartment to
another with fire attack from inside or outside the duct. It is applicable to vertical and horizontal ducts,
with or without branches, taking into account joints and exhaust openings, as well as suspension
devices and penetration points.
The test measures the length of time for which ducts, of specified dimensions, suspended as they
would be in practice, satisfy defined criteria when exposed to fire from (separately) both inside and
outside the duct.
All ducts are fully restrained in all directions where they are inside the furnace. Outside the furnace,
ducts exposed to fire from the outside are tested unrestrained, while ducts exposed to fire from the
inside (horizontal only) are tested restrained.
The test takes into account the effect of fire exposure from the outside where a 300 Pa under
pressure is maintained in the duct as well as the effect of fire entering the ducts in conditions where
forced air movement may or may not be present by maintaining a velocity of 3m/s.
Ducts exposed to fire from the inside are supplied with air in a manner, which is indicative of the "fan
off", and "fan on" situations, which could arise in practice.
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.
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oSIST prEN 1366-1:2008
prEN 1366-1:2008 (E)
1 Scope
This Part of EN 1366 is describing a method for determining the evaluation of fire resistance of
vertical and horizontal ventilation ducts including those access panels, which are integral part of the
tested ducts/duct walls. The test examines the behaviour of ducts exposed to fire from the outside
(duct A) and fire inside the duct (duct B). This Standard is used in conjunction with EN 1363-1.
Annex A provides general guidance and gives background information.
This European Standard is not applicable to:
a) ducts whose fire resistance depends on the fire resistance performance of a ceiling;
b) ducts containing fire dampers at points where they pass through fire separations;
c) access panels, which are evaluated independent from the tested ducts/duct walls;
d) two or three sided ducts;
e) fixing of suspension devices to floors or walls.
For evaluation of fire dampers see EN 1366-2.
For evaluation of smoke extraction ducts see EN 1366-8.
For evaluation of service ducts and shafts see prEN 1366-5.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies.
EN 520, Gypsum plasterboards — Specification — Test method (ISO 6308:1980 modified)
EN 12237, Ventilation for buildings — Ductwork — Strength and leakage of circular sheet metal ducts
EN 1363-1, Fire resistance tests — Part 1: General requirements
EN 1366-2, Fire resistance tests for service installations — Part 2: Dampers
prEN 1366-5, Fire resistance tests for service installations — Part 5: Service ducts and shafts
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 — Strength and
leakage — Requirements and testing
prEN ISO 13943, Fire safety — Vocabulary (ISO/DIS 13943:1998)
EN 20898-1, Mechanical Properties of fasteners — Part 1: Bolts, screws and studs (ISO 898:1980)
EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices — Part 1: Orifice
plates, nozzles and venturi tubes inserted in circular cross-section conduits (ISO 5167-1:1991)
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prEN 1366-1:2008 (E)
ISO 5221, Air distribution and air diffusion — Rules to methods of measuring air flow rate in an air-
handling duct
3 Definitions
For the purposes of this Part of EN 1366, the definitions given in EN 1363-1 and prEN ISO 13943,
together with the following, apply:
3.1
fire-resistant duct section
a duct used for the distribution or extraction of air and designed to provide a degree of fire resistance
3.2
combustible lining
a lining on the inner surface of the duct with a maximum thickness of 0,5 mm
3.3
self-supporting duct
a duct constructed e.g. from fire-protective boards without using a steel duct
3.4
suspension devices
the components used for suspending and fixing a duct from a floor or supporting a duct from a wall
3.5
supporting construction
the wall, partition or floor which the duct passes through in the test
3.6
compensator
a device that is used to prevent damage from the forces generated by expansion
3.7
access panel
a closure of an inspection opening within the duct
3.8
fire protected steel duct
steel duct with an external insulation to provide insulation in case of fire
4 Test equipment
4.1 General
In addition to the test equipment specified in EN 1363-1, and if applicable EN 1363-2, the following is
required:
4.2 Furnace
This shall be capable of subjecting ventilation ducts to the standard heating and pressure conditions
specified in EN 1363-1 and be suitable for testing ducts in the vertical (see Figure 1) or horizontal (see
Figure 2) orientation.
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4.3 Fan A
This shall be able to produce at the start and throughout the test an under pressure of (300 ± 15) Pa
within duct A (see Figure 3) and shall be connected either directly, or by a suitable length of flexible
ducting, to the measuring station described in 4.5.
NOTE If used as a smoke duct, the duct shall be tested in accordance with EN 1366-8.
4.4 Fan B
This shall be able to produce an air velocity when extracting gas from duct B (see Figure 5), of at least
3 m/s measured at ambient temperature in the duct before the test. It shall be connected either
directly, or by a suitable length of flexible ducting, to the velocity measuring station described in 4.8.
The fan shall be provided with a by-pass vent that can be opened prior to the damper described in 4.7
being shut.
4.5 Volume flow measuring station
This shall consist of a venturi, orifice plate, or other suitable device and (where necessary) an airflow
straightener, installed in straight lengths of pipe, all sized to EN ISO 5167-1 and ISO 5221. It shall be
connected to the end of duct A outside the furnace to determine the volume flow rate of gas passing
through duct A during the test. The measuring device shall be capable of measuring to an accuracy of
± 5 %. Regardless of whether vertical or horizontal ducts are being tested, the volume flow measuring
station shall always be used in a horizontal orientation.
4.6 Condensing unit
This shall be installed between the end of duct A and the flow-measuring device and shall allow for
drainage. The gas temperature adjacent to the flow-measuring device shall be measured by a 2 mm
sheathed thermocouple with an insulated hot junction, arranged pointing downwards to allow for
draining moisture. Its measuring junction shall be located at the centre line of the measuring duct and
at a distance equal to twice the diameter of the measuring duct downstream from the flow-measuring
device. The temperature measured by this thermocouple shall not exceed 40 °C.
4.7 Damper
This shall be installed between the fan and the velocity measuring station to shut off the airflow in duct
B during evaluation of integrity in the "fan-off" condition.
4.8 Velocity measuring station
This shall determine air velocity in duct B and shall consist of one or two inlet nozzle(s), or other
suitable device, installed in a straight length of pipe sized to EN ISO 5167-1 and ISO 5221, connected
to the end of both the vertical and horizontal duct B outside the furnace.
4.9 Equipment for measuring gas pressure
This shall be provided in the furnace and inside duct A.
4.10 Thermal movement measuring device
This shall be provided for measuring expansion/contraction of duct A and shall have an accuracy of
± 1 mm.
NOTE Measurements at penetration point (knowing that elongation outside the furnace will not be taken into
account).
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5 Test conditions
The heating conditions and the furnace atmosphere shall conform to those given in EN 1363-1.
The furnace pressure shall be controlled to (15 ± 3) Pa throughout the test at the mid-height position
of the horizontal ducts. For vertical ducts the furnace pressure shall be controlled to (20 ± 3)
Pa 100 mm below the ceiling.
For horizontal ducts, duct A and B superposed. The furnace pressure shall be controlled to (15 ± 3)
Pa at the mid-height position of duct B (lower duct).
Details of test conditions within the ducts during the test are given in clause 10.
6 Test specimen
6.1 Size
6.1.1 General
Ducts of sizes other than those given in Tables 1 and 2 have restricted the direct field of application
(see clause 13).
6.1.2 Length
The minimum lengths of the parts of the test specimen inside and outside the furnace shall be as
given in Table 1. (see also Figures 1 and 2):
Table 1 — Minimum length of test specimen
Orientation Minimum length (m)
Inside furnace Outside furnace
Horizontal
4,0 2,5
Vertical 2,0 2,0

6.1.3 Cross-section
The standard sizes of ducts given in Table 2 shall be tested unless only smaller cross-sections are
used:
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oSIST prEN 1366-1:2008
prEN 1366-1:2008 (E)

Table 2 — Cross-section of test specimen (dimension of the open cross-section
Duct Rectangular Circular
Width (mm) Height (mm) Diameter (mm)
A
1000 ± 10 500 ± 10 800 ± 10
B
1000
...