SIST EN ISO 7840:2000

SLOVENSKI STANDARD
SIST EN ISO 7840:2000
01-april-2000
Small craft - Fire resistant fuel hoses (ISO 7840:1994)
Small craft - Fire resistant fuel hoses (ISO 7840:1994)
Kleine Wasserfahrzeuge - Feuerwiderstandsfähige Kraftstoffschläuche (ISO 7840:1994)
Navires de plaisance - Tuyaux souples résistants au feu, pour carburant (ISO
7840:1994)
Ta slovenski standard je istoveten z: EN ISO 7840:1995
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
47.020.30 Sistemi cevi Piping systems
47.080 ýROQL Small craft
SIST EN ISO 7840:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 7840:2000

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SIST EN ISO 7840:2000

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SIST EN ISO 7840:2000

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SIST EN ISO 7840:2000

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SIST EN ISO 7840:2000

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SIST EN ISO 7840:2000
INTERNATIONAL
Is0
STANDARD
7840
Second edition
1994-12-15
Small craft - Fire-resistant fuel hoses
Navies de plaisance - Tuyaux soup/es rhistants au feu, pour carburant
Reference number
IS0 7840: 1994(E)

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SIST EN ISO 7840:2000
IS0 7840: 1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
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 IS0 7840 was prepared by Technical Committee
ISO/TC 188, Small craft.
This second edition cancels and replaces the first edition
(IS0 7840:1985), of which it constitutes a technical revision.
Annexes A and B form an integral part of this International Standard.
0 IS0 1994
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 photocopyrng and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST EN ISO 7840:2000
IS0 7840: 1994(E)
INTERNATIONAL STANDARD 0 60
- Fire-resistant fuel hoses
Small craft
IS0 1402:1994, Rubber and plastics hoses and hose
1 Scope
assemblies - Hydrostatic testing.
IS0 181711985, Rubber, vulcanized - Determination
This International Standard specifies general require-
of the effect of liquids.
ments and physical tests for fire-resistant hoses for
conveying petrol and diesel oil at low pressure, de-
IS0 7233:1991, Rubber and plastics hoses and hose
signed for a working pressure not exceeding
Determination of suction resistance.
assemblies -
0,34 MPa for hoses with nominal bore up to and in-
cluding 10 mm, and 0,25 MPa for hoses with a larger
IS0 7326:1991, Rubber and plastics hoses - As-
bore.
resistance under static
sessmen t of ozone
conditions.
It applies to hoses for small craft of up to 24 m length
of hull with permanently installed inboard engines.
IS0 10088: 1992, Small craft - Permanent/y installed
fuel systems and fixed fuel tanks.
NOTE 1 Specifications for non-fire-resistant fuel hoses
are laid down in IS0 8469.
3 General requirements
Hoses complying with this International Standard shall
present a smooth inner surface, free from pores,
other defects and chemical contaminants.
2 Normative references
The nominal bore shall be in accordance with
IS0 1307. Hoses shall demonstrate suitability for
The following standards contain provisions which,
marine use by complying with the requirements of the
through reference in this text, constitute provisions
tests in clause 5. They shall be marked according to
of this International Standard. At the time of publi-
clause 6.
cation, the editions indicated were valid. All standards
are subject to revision, and parties to agreements
based on this International Standard are encouraged
to investigate the possibility of applying the most re-
cent editions of the standards indicated below.
Members of IEC and IS0 maintain registers of cur-
4 Nominal bore
rently valid International Standards.
Table 1 gives some nominal bores, based on the R 10
IS0 1307:1992, Rubber and plastics hoses for
series in IS0 3’). Tolerances shall be as indicated in
general-purpose industrial applications - Bore diam-
table 1 or conform to IS0 1307.
eters and tolerances, and tolerances on length.
1) IS0 3:1973, Preferred numbers - Series of preferred numbers.

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SIST EN ISO 7840:2000
0 IS0
IS0 7840:1994(E)
Table 2 - Pressure conditions for suction
Table 1 - Nominal bores and tolerances
Dimensions in millimetres
resistance test
Tolerance
Nominal bore
Pressure below ambient
Nominal bore, d
mm kPa
32
+ 0,5
4 -
80
d< 10
5
IO-cd,<25 35
d > 25 No test required
6,3
8
Place the test pieces in liquid C at standard laboratory
10
+ 0,75 temperature (23 “C) for 70 h + 2 h.
-
12,5
If the hose is made of a homogeneous compound
16
(with or without reinforcements), the swelling in liquid
20
C shall not exceed 30 % by volume. For hoses with
25 an inner layer of fuel-resistant material and a cover of
+ I,25
-
another material, mainly intended for weather and
31,5
ozone resistance, the increase in volume in liquid C
40
shall not exceed 30 % for the tube and 120 % for the
cover.
50 It I,5
63
5.4 Mass reduction in liquid C
Determine the reduction in mass of the inner layer by
5 Physical tests on finished hose
the procedure described in IS0 1817. Treat the test
pieces as specified in 5.1.
5.1 Bursting pressure
The reduction in mass of the inner layer shall not ex-
Fill three hoses or test pieces from the hoses with
ceed 8 % of the initial mass of the test pieces.
Test Liquid C, as specified in IS0 1817:1985, and
store them for 7 days in air at standard laboratory NOTE 2 A reduction in mass of 8 % corresponds to a
decrease in volume of approximately 10 %.
temperature (23 “C).
Empty the liquid out and fill the hoses or test pieces
5.5 Fire resistance
with cold water; subject them to bursting pressure,
as specified
...