ISO 15541:1999
(Main)Ships and marine technology — Fire resistance of hose assemblies — Requirements for the test bench
Ships and marine technology — Fire resistance of hose assemblies — Requirements for the test bench
Navires et technologie marine — Résistance au feu des tuyauteries — Exigences du banc d'essai
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 15541
First edition
1999-08-01
Ships and marine technology —
Fire resistance of hose assemblies —
Requirements for the test bench
Navires et technologie marine — Résistance au feu des tuyauteries —
Exigences du banc d'essai
A
Reference number
ISO 15541:1999(E)
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ISO 15541:1999(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 15541 was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 3, Piping and machinery.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
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© ISO
ISO 15541:1999(E)
Introduction
The main objective of the test using the test bench described in this International Standard is to determine whether
and for how long a hose assembly can be exposed to fire, without becoming inoperable, e.g. without becoming
untight when subjected to the envisaged working pressure. Despite the fact that the attacking fire is simulated so as
to correspond to a fire occurring in practice, it cannot be assumed that the duration of resistance to fire as recorded
during the test will also occur in the event of an actual fire, as the conditions of installation, which essentially affect
the duration of resistance to fire, may vary from case to case.
Tests carried out using the test bench specified in this International Standard are intended to lead to results capable
of being reproduced.
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INTERNATIONAL STANDARD © ISO ISO 15541:1999(E)
Ships and marine technology — Fire resistance of hose
assemblies — Requirements for the test bench
1 Scope
This International Standard specifies requirements for a test bench to determine the fire resistance of hose
assemblies, in particular by tests according to ISO 15540, up to at least 100 mm nominal diameter. During the
exposure to flames, there are possible working pressures up to 10 bar.
The flame spread ability of the hose cannot be tested with the test bench specified in this International Standard.
Only water is permitted as a test medium. With a view to ensuring maximum safety for both the operating personnel
and the test bed in the event of damage to the hose during the test, the use of combustible test media is excluded.
2 Normative reference(s)
The following normative documents contain provisions that, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 15540:1999, Ships and marine technology — Fire resistance of hose assemblies — Test methods.
IEC 60051-1:1984, Direct acting indicating, analogue electrical-measuring instruments and their accessories —
Part 1: Definitions and general requirements common to all parts.
IEC 60051-1, Amendment No. 1:1994.
IEC 60051-1, Amendment No. 2:1995.
3 Term and definition
For the purposes of this International Standard, the following term and definition applies.
3.1
fire resistance
ability of an element of building construction, component or structure, to fulfil for a stated period of time the required
stability, integrity, thermal insulation and/or other expected duty specified, in a standard fire resistance test
4 Requirements
4.1 Components of test bench
The test bench shall consist of the following parts (see Figure 1):
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© ISO
ISO 15541:1999(E)
burner chamber with connecting device for the hose assembly, burner and exhaust gas trunk (see 4.2);
aggregate box with equipment for conditioning and controlling the test medium (see 4.3);
equipment for monitoring and recording the test procedure (see 4.4);
pressure-producing equipment which can load the test piece at the end of flame application with a test pressure
as specified in the technical specification (see 4.5).
Key
Indication, measurement, recording, control and
adjustments
1 Water temperature at test piece, inlet 7 Fan
2 Water temperature at test piece, outlet 8 Exhaust gas
3 Flame temperature below centre of test piece 9 Test piece
4 Flame temperature below test piece outlet 10 Watertank with heating/cooling
5 Flow rate of water 11 Sectional area burner
6 Working pressure during test 12 Mixing valve
13 Gas
14 Combustion gas
15 Air supply
16 Pump for pressure test
17 Test duration
Figure 1 — Diagram of test bench
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© ISO
ISO 15541:1999(E)
4.2 Burner chamber
4.2.1 General
The connections of the test piece shall be arranged to an operation height (e.g. 1 100 mm). They shall enable
testing of hose assemblies with a free length of hose of 500 mm minimum. A steady air flow upwards shall be
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provided. The base area of the air supply shall be approximately 0,6 m .
An example of an arrangement of a burner chamber, is shown in Figure 2.
4.2.2 Burner
The total sectional area of the burner shall be 150 mm ´ 500 mm minimum. The sectional area can consist of
several single-area burner units.
Burners with a minimum of 20 nozzles per square decimetre shall be used.
Burners shall be of the fan type.
Each single-area burner unit shall be provided with a mixing valve for mixing the gases and the combustion air,
creating a neutral flame of (800 ± 50) °C below the hose assembly on test.
The burner shall be movable to avoid exposing the test piece to the flames during adjustment of the flame.
The burner shall be variable in height in order that the flame can envelop test pieces of all possible nominal
diameters. Temperatures measured, approximately 15 mm directly under the test piece, shall be (800 ± 50) °C.
4.2.3 Exhaust trunk
The exhaust gas shall be drawn off upwards by means of an exhaust fan. The fan shall be infinitely variable. The
upward air flow
...
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