ISO 11515:2013

INTERNATIONAL ISO
STANDARD 11515
First edition
2013-07-15
Gas cylinders — Refillable composite
reinforced tubes of water capacity
between 450 L and 3000 L — Design,
construction and testing
Bouteilles à gaz — Bouteilles tubulaires en composite renforcé
rechargeables d’une capacité de 450 L à 3000 L — Conception,
construction et essais
Reference number
©
ISO 2013
© ISO 2013
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ii © ISO 2013 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 5
5 Inspection and testing . 5
6 Materials . 5
6.1 Liner materials . 5
6.2 Composite overwrap . 6
7 Design and manufacture . 6
7.1 General . 6
7.2 Design submission . 7
7.3 Manufacturing . 8
8 Type approval procedure . 9
8.1 General . 9
8.2 Prototype tests . 9
8.3 New design .10
8.4 Design variants .11
8.5 Type approval test procedures and criteria .12
8.6 Failure of type approval tests .29
9 Inspection and testing at time of manufacture .29
9.1 Liners for Type 2 and Type 3 tubes .29
9.2 Liners for Type 4 tubes .29
9.3 Failure of liner batch tests .30
9.4 Overwrap materials .30
9.5 Composite tube .31
9.6 Failure of batch tests .31
10 Tube marking .32
10.1 General .32
10.2 Additional marking .32
Annex A (informative) Examples of design approval certificate .33
Annex B (informative) Specimen test reports .34
Annex C (normative) Ultrasonic inspection for seamless steel liners and metal tubing .36
Bibliography .41
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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder design.
iv © ISO 2013 – All rights reserved

Introduction
The purpose of ISO 11515 is to provide a specification for the design, manufacture, inspection and testing
of composite tubes for worldwide usage. The objective is to balance design and economic efficiency
against international acceptance and universal utility.
ISO 11515 aims to eliminate the concern about climate, duplicate inspection and restrictions currently
existing because of lack of definitive International Standards and should not be construed as reflecting
on the suitability of the practice of any nation or region.
ISO 11515 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.
Annexes A and B of ISO 11515 are for information only.
INTERNATIONAL STANDARD ISO 11515:2013(E)
Gas cylinders — Refillable composite reinforced tubes
of water capacity between 450 L and 3000 L — Design,
construction and testing
1 Scope
This International Standard specifies minimum requirements for the design, construction and
performance testing of composite reinforced tubes between 450 l and 3 000 l water capacity, for
transport, storage and use of compressed or liquefied gases with test pressures up to and including
1600 bar with a design life of at least 15 years and less than or equal to 30 years. The expected service
temperatures are between −40 °C and +65 °C.
The tubes defined are one of three types:
Type 2: a hoop wrapped tube with a load sharing metal liner and composite reinforcement on the
cylindrical portion only.
Type 3: a fully wrapped tube with a load sharing metal liner and composite reinforcement on both the
cylindrical portion and the dome ends.
Type 4: a fully wrapped tube with a non-load sharing liner and composite reinforcement on both the
cylindrical portion and the dome ends.
The Type 4 tubes manufactured and tested to this International Standard are not intended to contain
toxic, oxidizing or corrosive gases.
This International Standard is limited to tubes with composite reinforcement of carbon fibre or aramid
fibre or glass fibre (or a mixture thereof) in a matrix.
Composite tubes can be used alone or in batteries to equip trailers or skids (ISO modules) or multiple
element gas containers (MEGC) for the transportation and distribution of gases. This International
Standard does not include consideration of any additional stresses that can occur during service or
transport, (e.g. torsional / bending stresses). However it is important that the stresses associated with
mounting the tube are considered by the assembly manufacturer and the tube manufacturer.
NOTE The design life of tubes according to this International Standard for transport of dangerous goods can
be limited by the applicable regulations.
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 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)
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 4624, Paints and varnishes — Pull-off test for adhesion
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7225, Gas cylinders — Precautionary labels
ISO 7866, Gas cylinders — Refillable seamless aluminium alloy gas cylinders — Design, construction and testing
ISO 9227:2012, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel
ISO 9809-1, Gas cylinders — Refillable seamless steel gas cylinders — Design, construction and testing —
Part 1: Quenched and tempered steel cylinders with tensile strength less than 1 100 MPa
ISO 9809-2, Gas cylinders — Refillable seamless steel gas cylinders — Design, construction and testing —
Part 2: Quenched and tempered steel cylinders with tensile strength greater than or equal to 1 100 MPa
ISO 9809-3, Gas cylinders — Refillable seamless steel gas cylind
...