ISO 11119-3:2013

INTERNATIONAL ISO
STANDARD 11119-3
Second edition
2013-04-15
Gas cylinders — Refillable composite gas
cylinders and tubes
Part 3:
Fully wrapped fibre reinforced composite
gas cylinders and tubes up to 450L with
non-load-sharing metallic or non-metallic
liners
Bouteilles à gaz — Bouteilles à gaz rechargeables en matériau
composite et tubes
Partie 3: Bouteilles à gaz composites entièrement bobinées renforcées
par des fibres et tubes d'une contenance allant jusqu'à 450 l avec liners
métalliques ou non métalliques ne transmettant pas la charge

Reference number
©
ISO 2013
©  ISO 2013
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Published in Switzerland
ii © ISO 2013 – All rights reserved

Contents Page
Foreword . iv
Introduction . v
1  Scope . 1
2  Normative references . 2
3  Terms and definitions . 2
4  Symbols and units . 4
5  Inspection and testing . 4
6  Materials . 5
6.1  Liner materials . 5
6.2  Composite materials . 5
7  Design and manufacture. 5
7.1  General . 5
7.2  Design submission . 6
7.3  Manufacturing . 7
8  Type approval procedure. 7
8.1  General requirements . 7
8.2  Prototype tests . 7
8.3  New design . 9
8.4  Design variants . 10
8.5  Type approval test procedures and criteria. 13
8.6  Failure of type approval tests . 27
9  Batch inspection and testing . 28
9.1  Liner . 28
9.2  Failure of liner batch tests . 29
9.3  Overwrap materials . 29
9.4  Composite cylinder . 29
9.5  Cylinder failure during type approval or batch testing . 30
10  Cylinder marking . 31
10.1  General . 31
10.2  Additional marking . 31
Annex A (informative) Examples of design approval certificate . 32
Annex B (informative) Specimen test reports . 33
Annex C (informative) Test report for equivalency . 36
Bibliography . 39

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 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11119-3 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder
design.
This second edition cancels and replaces the first edition (ISO 11119-3:2002), which has been technically
revised.
ISO 11119 consists of the following parts, under the general title Gas cylinders — Refillable composite gas
cylinders and tubes — Design, construction and testing:
 Part 1: Hoop wrapped fibre reinforced composite gas cylinders and tubes up to 450 l
 Part 2: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450 l with load-sharing
metal liners
 Part 3: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450L with non-load-
sharing metallic or non-metallic liners
The following part is under preparation:

— Part 4: Fully wrapped fibre reinforced composite gas cylinders with load-sharing welded metal liners
iv © ISO 2013 – All rights reserved

Introduction
The purpose of ISO 11119 is to provide a specification for the design, manufacture, inspection and testing of
cylinders for world-wide usage. The objective is to balance design and economic efficiency against
international acceptance and universal utility.
ISO 11119 aims to eliminate the concern about climate, duplicate inspection and restrictions currently existing
because of lack of definitive International Standards and is not to be construed as reflecting on the suitability
of the practice of any nation or region.
This part of ISO 11119 addresses the general requirements on design, construction and initial inspection and
testing of pressure receptacles of the United Nations “Recommendations on the Transport of Dangerous
Goods Model Regulations.”
INTERNATIONAL STANDARD ISO 11119-3:2013(E)

Gas cylinders — Refillable composite gas cylinders and
tubes —
Part 3:
Fully wrapped fibre reinforced composite gas cylinders and
tubes up to 450L with non-load-sharing metallic or non-metallic
liners
1 Scope
This part of ISO 11119 specifies requirements for composite gas cylinders up to 150 l water capacity and
composite tubes above 150 l water capacity and up to 450 l water capacity, for the storage and conveyance of
compressed or liquefied gases.
The cylinders and tubes in this part of ISO 11119 are
a) Type 4 Fully Wrapped Cylinders or Tubes with a non-load sharing liner and composite reinforcement on
both the cylindrical portion and the dome ends, and
b) Type 5 Fully Wrapped Cylinders or Tubes without liners (including cylinders without liners manufactured
from two parts joined together) and with a test pressure of less than 60 bar.
The cylinders are constructed:
1) in the form of a disposable mandrel overwrapped with carbon fibre or aramid fibre or glass fibre (or a
mixture thereof) in a resin matrix to provide longitudinal and circumferential reinforcement;
2) in the form of two filament wound shells joined together.
Cylinders and tubes manufactured and tested to this part of ISO 11119 are not intended to contain toxic,
oxidizing or corrosive gases.
This part of ISO 11119 is limited to cylinders and tubes with composite reinforcement of carbon fibre or aramid
fibre or glass fibre (or a mixture thereof) in a matrix.
Cylinders and tubes manufactured and tested to this part of ISO 11119 have a minimum design life of 15
years.
This part of ISO 11119 does not address the design, fitting and performance of removable protective sleeves.
NOTE 1 References to cylinders in this International Standard include composite tubes if appropriate.
NOTE 2 ISO 11439 applies to cylinders intended for use as fuel containers on natural gas vehicles and ISO 11623
covers periodic inspection and re-testing of composite cylinders.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 3341, Textile glass — Yarns — Determination of breaking force and breaking elongation
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,
K, N, T)
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7225, Gas cylinders — Precautionary labels
ISO 10618, Carbon fibre — Determination of tensile properties of resin-impregnated yarn
ISO 14130, Fibre-reinforced plastic composites — Determination of apparent interlaminar shear strength by
short-beam method
ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1:
Metallic materials
ISO 11114-2, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 2: Non-
metallic materials
ISO 13769, Gas cylinders — Stamp marking
ASTM D7269, Standard Test Methods for Tensile Testing of Aramid Yarns
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE References to cylinders include composite tubes if appropriate.
3.1
aramid fibre
continuous filaments of aramid laid up in tow form
3.2
batch
set of homogeneous items or material
NOTE The number of items in a batch can vary according to the context in which the term is used.
3.3
batch of metallic liners
quantity of liners of the same nominal diameter, length, thickness and design, made successively from the
same batch of materials, subjected to the same manufacturing process and heat treated to the same
conditions of temperature and time
2 © ISO 2013 – All rights reserved

3.4
batch of non-metallic liners
quantity of liners of the same nominal diameter, length, thickness and design, made successively from the
same batch of materials and subjected to the same manufacturing process
3.5
batch of finished cylinders
production quantity of up to 200 finished cylinders successively produced by the same manufacturing process,
plus finished cylinders required for destructive testing, of the same nominal diameter, length, thickness and
design
3.6
burst pressure
highest pressure reached in a liner or cylinder during a burst test
3.7
carbon fibre
continuous filaments of carbon laid up in tow form
3.8
comp
...