ISO/TR 6065:1991

TECHNICAL ISO
REPORT
TR 6065
First edi tion
1991-11-15
-
Shipbuilding and marine structures - fnflatable
liferafts - Materials
Construcfion navale et structures mat-Hirnes - Radeaux pneumatiques
de sauvetage - Mat&-iaux
Reference number
lSO/TR 6065: 199 1 (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. Esch 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, govern-
mental 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.
The main task of technical committees is to prepare International Stan-
dards, but in exceptional circumstances a technical committee may
propose the publication of a Technical Report of one of the following
types:
1 when the required support cannot be obtaine d for the publi-
- tYPe
catio in’ of an International Standard despit e repeated efforts;
- type 2, when the subject is still under technical development or
where for any other reason there is the future but not immediate
possibility of an agreement on an International Standard;
- type 3, when a technical committee has collected data of a different
kind from that which is normally published as an International Stan-
dard (“state of the art”, for example).
Technical Reports of types 1 and 2 are subject to review within three
years of publication, to decide whether they tan be transformed into
International Standards. Technical Reports of type 3 do not necessarily
have to be reviewed until the data they provide are considered to be no
longer valid or useful.
ISWTR 6065, which is a Technical Report of type 1, was prepared by
Technical Committee ISO/TC 8, Shipbuilding and marine structures,
Sub-Committee SC 9, Lifesaving equipment.
The reasons which led to the decision to publish this document in the
form of a technical report type 1 are explained in the Introduction.
Annex A forms an integral part of this Technical Report.
0 ISO 1991
All rights reserved. No part of this publication may be reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 * Switzerl and
Printed in Switzerland
ii
Introduction
lt was initially intended to publish an International Standard on this
subject: ISO/DIS 6065 was submitted for combined voting to the mem-
bers of Technical Committee ISO/TC 8 and to all ISO member bodies, in
1989. This draft did not gain the necessary support for publication as an
International Standard.
Sub-Committee ISO/TC 8/SC 9, Lifesaving equipment, during its meeting
held in Tokyo in October 1990, studied the member bodies’ comments
and found that it would be impossible to achieve substantial support in
view of the fact that many countries differ in the requirements for the’
materials of inflatable liferafts (tensile strength, tear strength, coating
adhesion, etc.) stipulated in national rules or regulations.
lt was then decided to stop the work and propose drawing up a Techni-
cal Report, of type 1, for the benefit of those member bodies who wish
to refer to the result of the work.

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TECHNICAL REPORT ISO/TR 60651991 (E)
Shipbuilding and marine structures - Inflatable liferafts -
Materials
IQ83 Amendments to the International Convention
1 Scope
for the Safety of Life at Sea, 1974 (SOLAS 1974),
Chapter Ill, Part C, Section 1, Regulation 30, Section
This Technical Report specifies the fabrics and test
IV, Regulations 38 and 39, and Recommendation.
procedures of fabrics for inflatable liferafts required
by Regulation 30 of Section 1, Regulations 38 and 39
of Section IV, Part C, Chapter Ill, and Recommenda-
3 Fabrics
tion on testing of lifesaving appliances in 1983
Amendments to the International Convention for the
3.1 General
Safefy of Life at Sea, 1974 (SOLAS 1974).
The fabrics used in the construction of inflatable
liferafts shall be
2 Normative references
a) waterproof (fabrics used for the inner lining of
The following Standards contain provisions which,
the canopy may simply be water-repellent);
through reference in this text, constitute provisions
of this Technical Report. At the time of publication,
b) able to withstand a tensile stress equivalent to
the editions indicated were valid. All Standards are
at least four times the hoop stress which will be
subject to revision, and Parties to agreements based
induced in the gas-inflated tubes at the opening
on this Technical Report are encouraged to investi-
pressure of the safety valves.
gate the possibility of applying the most recent edi-
tions of the Standards indicated below. Members of
3.2 Base fabric
IEC and ISO maintain registers of currently valid
International Standards.
The base fabric shall be inherently rot-proof.
ISO 1421:1977, Fabrics coated with rubber or plastics
- Determination of breaking strength and elongation
3.3 Coating material
at break
Materials shall be natura1 or synthetic rubber or
ISO 1817:1985, Rubber, vulcanized - Determination
other suitable polymer proofed to meet the require-
of the effect of liquids
ments given in table 1. They should satisfy the re-
quirements of Regulation 30 of Section 1,
ISO 2286:1986, Rubber- or plastics-coated fabrics -
Regulations 38 and 39, Section IV, Part C, Chapter
Determination of roll characteristics
Ill, and Recommendation on testing of lifesaving ap-
pliances of 1983 Amendments to fhe International
ISO 2411:1991, Rubber- or plastics-coated fabrics -
Convention for the Safety of Life at Sea, 1974.
Defermina tion of cos ting adhesion
ISO 3011:1981, Rubber or plasfics coated fabrics -
3.4 Adhesive
Determination of resistance to ozone cracking under
static conditions
Adhesives used in the manufacture of liferafts shall
be compatible with the material used. Where a test
ISO 4674:1977, Fabrics coated with rubber or plastics
method requires the use of an adhesive, the method
- Determination of tear resistance
of preparation, the adhesive and its method of ap-
ISO 4675:1990, Rubber- cw plastics-coated fabrics - plication shall be agreed between the liferaft manu-
Low-temperature bend test facturer and the rubber proofer and shall be the
ISO/TR 60651991 (E)
Same as those which will be used during manufac- d) oil resistance;
ture of the liferaft.
e) cold resistance;
4 Tests and Performance
9 coating adhesion;
The fabrics used for main buoyancy chambers, floor
g) air-tightness;
chambers, canopy supports, thwarts and exterior
canopies shall comply with the Standard values of
h) mass per unit area.
Performance as given in table 1 when type-tested in
accordance with the procedures given in annex A.
5.2 The following items concerning fabrics to be
5 Tests on production fabrics
used for the outer canopy shall be tested on the ba-
sis of the agreement between manufacturers of fab-
ries and manufacturers of liferafts for quality
5.1 The following items concerning fabrics to be
certification and/or quality assurance purposes.
used for the buoyancy chamber, floor, canopy sup-
port or thwart shall be tested on the basis of the Other tests defined in table 1 shall be performed at
agreement between manufacturers of fabrics and an agreed reduced frequency:
manufacturers of liferafts for quality certification
and/or quality assurance purposes. Other tests de- a) tensile strength and elongation;
fined in table 1 shall be performed at an agreed re-
b) tear strength;
duced frequency:
a) tensile strength and elongation; c) ageing resistance;
d) water-proofness;
b) tear strength;
e) mass per unit area.
c) ageing resistance;
Table 1 - Performance criteria
Performance criteria
Annex
Quality clause
for main buoyancy chamber, floor,
for exterior canopy
No.
canopy support and thwart
Tensile strength Not less than 2 kN/5 cm width or as Not less than 0,5 kN/5 cm width A.2.1
required by 3.1 b)l)
Elongation Not more than 35 % A.2.1
Tear strength: A.2.2
method A.2.2.1 Not less than 40 N Not less than IO N
method A.2.2.2 For main buoyancy chamber, canopy Not less than 450 N in warp and weft
support and thwart:
-
not less than 800 N in warp
- not less than 750 N in weft
For floor:
-
not less than 700N 1) in warp and
weft
A.2.3
Ageing resistance Free of stickiness, brittleness, Cracks Free of stickiness, brittleness, Cracks
or any other deterioration or any other deterioration
Tensile strength after ageing shall be Tensile strength after ageing shall be
not less than 90 O/o of that before not less than 90 */o of that before
ageing agei ng
-
The differente in dimensions before
and after ageing shaff not be more
than 2 %
Performance criteria
Annex
Quality
clause
for main buoyancy chamber, floor,
for exterior canopy
No.
canopy support and thwart
Seam strength In the tensile test, the break should In the tensile test, the break should
A.2.4
occur at a part other than the seam occur at a part other than the seam
-
Oil resistance Free of tackiness or any other deteri- A.2.5
oration
Cold resistance Free of cracking or any other deteri- Free of cracking or any other deteri- A.2.6
oration oration
Coating adhesion Not less than 10 NI1 cm width Not less than 5 NI1 cm width A.2.7
Resistance to flex cracking: A.2.8
-
method A.2.8.1 Free of Separation between fabric and
coating material
-
Tenside strength after flexing shall be
not less than 90 O/o of the tensile
strength before cracking
-
method A.2.8.2 No cracking or deterioration after
200 000 cycles
-
Water-proofness (Hydraulic Free of bursting, leakage or any other A.2.9
deterioration
test)
---
Air-tightness:
A.2.10
-
method A.2.10.1 Less than 3 l/m*/24 h using H2 gas
-
method A.2.10.2 No bubbles after 5 min
Ozone resistance Free of visible cracking Free of visible cracking A.2.11
-
Sea water resistance Free of peeling and colour fading A.2.12
In the tensile test, the break should
occur at a part other than the seam
Mass per unit area As required by the specification As required by the specification A.2.13
1) Where two layers of floor fabric are provided to form an inflatable floor, the secondary layer may have a minimum
tensile strength of 1,15 kN/5 cm width and a minimum tear strength of 450 N.

ISO/TR 60651991 (E)
Annex A
(normative)
Tests for coated materials used for inflatable liferafts
c) for fabrics over 500 g/m*: IO N.
A.1 General conditions for tests
The test reports shall be recorded as the arithme-
A.1 .l Standard test atmospheres
tical average of five specimens each for warp and
Weft.
Unless otherwise specified, the test atmospheres
shall be at a temperature of 20 “C + 2 “C and rel-
A.2.2 Tear fest
ative humidity of (65 + 5) %. The temperature, hu-
midity and atmospheric pressure at the time of the
Two alternative test methods, the constant rate of
test shall be recorded.
traverse method (see A.2.2.1) or the wound test
method (A.2.2.2) may be used for the tear test at the
A.1.2 Conditioning of test specimens
discretion of the national administration.
The test specimens shall have been vulcanized for
A.2.2.1 Cons?ant rate of traverse method
not less than 24 h and not more than 3 months and
shall be kept under the Standard atmosphere for at
The test shall be performed in accordance with
least 16 h Prior to test.
Method A - Constant rate of tear, specified in
ISO 4674.
A.1.3 Test specimens
Five test specimens shall be tut parallel to the warp
and five to the Weft.
The required number of test specimens shall be
taken from the effective width of the coated fabric
The test specimens shall be the so-called trouser-
weil away from the selvedges and the ends, and in
shaped test pieces of Method A2 in ISO 4674: a rec-
both directions parallel to the warp and to the Weft.
tangular Strip 225 mm by 75 mm + 0,5 mm wide,
-
with a longitudinal slit 80 mm long beginning from
A.2 Test procedures
the middle of the width.
Place the test specimens symmetrically in the grips
A.2.1 Tensile test
with one tongue in each of the grips, with the uncut
end of the test specimen remaining free.
This test shall be carri ed out to determine tens ile
.
strength and e longation concu rrently with breakin
lg
Ensure that each tongue is fixed in a grip so that the
beginning of the tear is parallel to the direction in
The test shall be performed in accordance with the
which the tearing forte is applied.
method specified in ISO 1421.
The test shall be carried out at a tensile Speed of
specimens shall be tut parallel
Five rectangular test
100 mm/min + 10 mm/min for both warp and weft
to the warp and five to the Weft.
directions upto breaking Point.
Test specimens shall be 50 mm wide and of such a
The test reports shall be recorded as the arithme-
length as to permit a free length of 200 mm between
tical average of five specimens each for warp and
the grips.
Weft.
They shall be tested at the tensile Speed of
A.2.2.2 Wound test methsd
100 mm/min + IO mm/min.
-
Prior to the tensile test, the appropriate pretension
A.2.2.2.1 Apparatus
shall be applied to the test specimens:
The apparatus shall be an approved strength-testing
a) for fabrics up to and including 200 g/m*: 2 N;
machine complying with clause 5 of ISO 1421:1977
except that
b) for fabrics over 200 g/m* up to and including
500 g/m*: 5 N;
ISO/TR 60651991 (E)
Suspend the other half of the samples over water in
a) the constant rate of traverse method may be
a loosely closed vessel for the Same period of time
used, the rate being not more than
70 mm/min + IO mm/min grip Separation; at 70 “C + 1 “C.
- -
b) the load indicated at any part of the range used
A.2.3.3 Test procedures
is correct within 1 % of the actual load.
A.2.3.3.1 Dimensional stability test
A.2.2.2.2 Test specimens
Measure the Overall dimensions of the specimens
From the test Sample, tut three rectangular speci- before and after ageing and report the percentage
mens each 75 mm + 0,5 mm wide and 300 mm to Change in warp and weft directions.
400 mm long as convenient, with the length closely
parallel to the direction of the warp threads and also
A.2.3.3.2 Folding test
three specimens
...