ISO 11372:2005

INTERNATIONAL ISO
STANDARD 11372
Second edition
2005-09-15
Gas cylinders — Cylinders for dissolved
acetylene — Inspection at time of filling
Bouteilles à gaz — Bouteilles à acétylène dissous — Contrôle au
moment du remplissage

Reference number
ISO 11372:2005(E)
©
ISO 2005

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ISO 11372:2005(E)
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ISO 11372:2005(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 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 11372 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 4, Operational
requirements for gas cylinders.
This second edition cancels and replaces the first edition (ISO 11372:1995), which has been technically
revised.
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ISO 11372:2005(E)
Introduction
This International Standard covers requirements that reflect current practice and experience.
Each transportable gas cylinder for dissolved acetylene is inspected at time of filling in order to establish that
— it has no defects such that the cylinder is unsafe for filling or continued use;
— it can be identified and complies with the relevant requirements with regard to marking, labelling, colour
coding and completeness of its accessories;
— its valve functions satisfactorily;
— the appropriate amounts of solvent and acetylene have been determined and charged.
The cylinder filling inspection is to be carried out only by persons who are trained and competent in the subject,
for the purpose of ensuring that a cylinder is safe for continued use.
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INTERNATIONAL STANDARD ISO 11372:2005(E)
Gas cylinders — Cylinders for dissolved acetylene — Inspection
at time of filling
1Scope
This International Standard
— specifies minimum requirements that reflect current practice and experience for inspection at time of filling
of single cylinders of water capacity up to 150 l for the storage and transport of dissolved acetylene gas
under pressure;
— is not applicable to palletized cylinders, or to manifolded cylinders or manifolded bundles on trailers;
— does not cover aspects related to the inspection or testing of the porous material.
NOTE In International Standards, weight is equivalent to a force, expressed in newtons. However, in common parlance (as
used in terms defined in this International Standard), the word “weight” continues to be used to mean mass, although this
practice is deprecated (ISO 31-3).
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
complete cylinder
cylinder shell ready to be charged with acetylene gas that is complete with porous material, solvent, saturation
gas, valve, any valve protection (permanently attached to the cylinder shell) and other permanently fixed
accessories
NOTE Examples of permanently fixed accessories are neck ring, foot ring and fusible plugs.
2.2
cylinder shell
pressure vessel manufactured for storage and transport, and suitable for containing a porous material, a solvent
for the acetylene and the acetylene
2.3
filler
person or persons responsible for inspection prior to, during and immediately after filling and who has or have
received an appropriate level of training for the work involved and has or have access to all necessary data for
the cylinder, valve and all other fittings used
2.4
maximum acetylene content
specified maximum mass of acetylene in the cylinder (in kilograms), including the mass of saturation gas
2.5
maximum charging weight
2.5.1
maximum charging weight
〈tare A〉 maximum acetylene content (2.4)
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ISO 11372:2005(E)
2.5.2
maximum charging weight
〈tare S〉 maximum acetylene content (2.4) minus saturation gas (2.8)
2.6
nominal weight of solvent
weight of solvent to be added to the complete cylinder, as established during the prototype testing
2.7
porous material
single or multicomponent material introduced or formed in the cylinder shell in order to completely fill it, whose
porosity allows the absorption of the solvent and the acetylene gas
NOTE The porous material may be either
— monolithic, consisting of a solid product obtained by reacting materials or by materials connected together with a binder;
or
— non-monolithic, consisting of granular, fibrous or similar materials without the addition of a binder.
2.8
saturation gas
◦
weight of acetylene dissolved in solvent in a cylinder at atmospheric pressure and 15 C
2.9
solvent
liquid absorbed by the porous material and capable of dissolving and releasing acetylene
2.10
tare
2.10.1
tare A
weight of the complete cylinder (2.1) without saturation gas
2.10.2
tare S
weight of the complete cylinder (2.1) including saturation gas
2.10.3
tare F
tare A (2.10.1) minus the weight of solvent
NOTE Tare F is used for solvent-free acetylene cylinders.
2.11
working pressure
◦
maximum settled pressure in bar (gauge) developed at a uniform temperature of 15 C in a cylinder containing
the maximum acetylene content and the specified weight of solvent
3 Filling inspection
Each cylinder shall be subjected to an inspection prior to, during and immediately after filling. The following
items shall be covered by a filling inspection:
a) verification of serviceable condition (see 4.1);
b) identification of cylinder's suitability for filling (see 4.2);
c) identification of cylinder owner, if required (see 4.3);
d) verification of integrity and presence of permanent attachments (e.g. neck ring/threaded boss) (see 4.4);
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ISO 11372:2005(E)
e) verification of valve integrity and suitability (see 4.5);
f) verification of filling conditions (see 4.6);
g) check of the valve protection (see 4.7).
Cylinders not fulfilling items a) to g) shall be clearly identified according to written procedures of the filling
company.
4 Description of inspection items
4.1 Verification of serviceable condition
It shall be established that each cylinder is in a serviceable condition before it is taken to the filling manifold. It
shall therefore be established that the cylinder is clean and free of foreign material (i.e. such that the cylinder
can be assessed for mechanical damage that would prevent it from being filled safely) and does not exhibit any
abnormalities that could impair the safety such as arc burns, severe corrosion, heat/fire damage or significant
mechanical damage.
Any pressure relief device, if fitted, such as a fusible plug, shall be
...