23.020.35 - Gas cylinders

This European Standard specifies the design, testing and marking requirements for caps and plugs used to form a pressure tight seal with liquefied petroleum gas (LPG) cylinder valves and pressure vessel valves. Sealing caps and plugs provide an additional seal for self-closing and manually operated valves.  
Dust caps and tamper evident seals that do not form an additional seal as part of their design are excluded from the scope of this European Standard.
Cylinder valve caps and plugs may be used with valves for liquid and vapour manufactured in accordance with EN ISO 14245 and EN ISO 15995.
Pressure vessel valve caps and plugs may be used with valves for liquid and vapour manufactured in accordance with EN 13175. Occasional liquid withdrawal valve caps and plugs are excluded from the scope of this European Standard.
Reusable and single use sealing caps and plugs are included in this European Standard.
This European Standard does not exclude the use of other designs that provide an equivalent level of safety.
NOTE   The term "pressure vessel" does not include LPG tank vehicles, also called "road tankers", in CEN/TC 286 standards.

This European Standard specifies stamp marking requirements for transportable refillable LPG cylinders and metallic drums including:
-   Steel LPG cylinders designed and manufactured in accordance with EN 1442, EN 14140, EN 12807 or an equivalent standard or technical code recognised by the Competent Authority.
-   LPG metallic drums designed and manufactured in accordance with EN 14893 or an equivalent standard or technical code recognised by the Competent Authority.
-   Welded aluminium LPG cylinders designed and manufactured in accordance with EN 13110 or an equivalent standard or technical code recognised by the Competent Authority.
-   LPG composite cylinders designed and manufactured in accordance with EN 14427 or an equivalent standard or technical code recognised by the Competent Authority.
NOTE 1   All these types of receptacles are referred to throughout this standard as "cylinders".
This European Standard does not specify any requirements for product, hazard or safety-phrase labelling of packaging which may be required to meet ADR or other legislative requirements.
NOTE 2   The marking of cylinders is regulated by RID/ADR which take precedence over any clause in this European Standard. The European Directive on Transportable Pressure Equipment 2010/35/EU [9] includes additional marking requirements (-marking).

This document specifies the procedures to be adopted when checking transportable refillable LPG cylinders before, during and after filling.
This document applies to transportable refillable LPG cylinders of water capacity not exceeding 150 l and deemed to be fitted with valves designed according to EN ISO 14245 [4] and EN ISO 15995 [5].
This document does not cover the requirements for filling LPG cylinders that are designed and equipped for filling by the user.
This document does not cover the requirements for filling LPG containers on vehicles.
This document is applicable to the following:   
-   welded and brazed steel LPG cylinders with a specified minimum wall thickness (see EN 1442 and  EN 12807 [1] or an equivalent standard);
-   welded steel LPG cylinders without specified minimum wall thickness (see EN 14140 or an equivalent standard);
-   welded aluminium LPG cylinders (see EN 13110 [2] or an equivalent standard);
-   composite LPG cylinders (see EN 14427 or an equivalent standard); and
-   over-moulded cylinders (OMC).
Specific requirements for the different types of cylinders are detailed in Annex A, Annex B, Annex C, Annex D and Annex G.
This draft standard is intended to be applied to cylinders complying with RID/ADR [6] [7] (including pi marked cylinders) and also to existing non RID/ADR cylinder populations.

This document gives guidance on the selection and evaluation of compatibility between non-metallic
materials for gas cylinders and valves and the gas contents. It is also applicable to tubes, pressure
drums and bundles of cylinders.
This document covers composite and laminated materials used for gas cylinders. It does not include
ceramics, glasses and adhesives.
This document considers the influence of the gas in changing the material and mechanical properties
(e.g. chemical reaction or change in physical state). The basic properties of the materials, such as
mechanical properties required for design purposes (normally available from the materials supplier),
are not considered. Other aspects, such as quality of delivered gas, are not considered.
The compatibility data given are related to single component gases but can be applicable to gas
mixtures.
This document does not apply to cryogenic fluids (this is covered in ISO 21010)

This document specifies design, type testing, marking and manufacturing test and examination
requirements for ball valves used as:
a) closures of refillable transportable gas cylinders, pressure drums and tubes;
b) main valves for cylinder bundles;
c) valves for cargo transport units (e.g. trailers, battery vehicles and MEGCs);
which convey compressed gases, liquefied gases and dissolved gases.
NOTE 1 In the course of the document, the term "valve" is used with the meaning of "ball valve".
This document does not apply to:
•   oxidizing gases as defined in ISO 10156,
•   toxic gases (i.e. gases listed in ISO 10298 having an LC50 value ≤ 5 000 ppm) and
•   acetylene for single gas cylinders, pressure drums and tubes.
NOTE 2 The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high
pressure cylinders for oxidizing gases is known to lead to specific ignition hazards that cannot reasonably be mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any downstream equipment.
This International document does not apply to ball valves for liquefied petroleum gas (LPG),
cryogenic equipment, portable fire extinguishers and cylinders for breathing apparatus.
NOTE 3 Requirements for valves for cryogenic vessels are specified in ISO 21011 and at a regional level, e.g. in EN 1626. Requirements for valves for portable fire extinguishers at a regional level are specified e.g. in EN 3 series.
NOTE 4 Certain specific requirements for valves for breathing apparatus in addition to those that are
given in this document are specified at a regional level, e.g. in EN 144 series. Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to those that are given in this document are specified in ISO 16003 and at a regional level e.g. in EN 12094–4.

This document defines terms for gas cylinders.

2019-02-18: WI changed from revision to Amendment further to same change at ISO

This document specifies the minimum requirements for the materials, design, construction and workmanship, manufacturing processes, examinations and testing at time of manufacture for refillable, seamless, stainless steel gas cylinders with water capacities up to and including 150Â l. It is applicable to cylinders for compressed, liquefied and dissolved gases with a maximum actual tensile strength, Rma, of less than 1Â 100Â MPa. NOTEÂ Â Â Â Â Â Â Â If so desired, cylinders of water capacity between 150Â l and 450Â l can be manufactured to be in full conformance to this document.

This document gives guidance on the selection and evaluation of compatibility between non-metallic materials for gas cylinders and valves and the gas contents. It is also applicable to tubes, pressure drums and bundles of cylinders. This document covers composite and laminated materials used for gas cylinders. It does not include ceramics, glasses and adhesives. This document considers the influence of the gas in changing the material and mechanical properties (e.g. chemical reaction or change in physical state). The basic properties of the materials, such as mechanical properties required for design purposes (normally available from the materials supplier), are not considered. Other aspects, such as quality of delivered gas, are not considered. The compatibility data given are related to single component gases but can be applicable to gas mixtures. This document does not apply to cryogenic fluids (this is covered in ISO 21010).

This document specifies design, type testing, marking, manufacturing tests and examinations requirements for ball valves used as: closures of refillable transportable gas cylinders, pressure drums and tubes; main valves for cylinder bundles; valves for cargo transport units [e.g. trailers, battery vehicles, multi-element gas containers (MEGCs)]; which convey compressed gases, liquefied gases and dissolved gases. NOTE 1     In this document, the term “valve” is used with the meaning of “ball valve”. This document does not apply to ball valves for: oxidizing gases as defined in ISO 10156; toxic gases (i.e. gases listed in ISO 10298 having an LC50 value ≤ 5 000 ppm acetylene for single gas cylinders, pressure drums and tubes. NOTE 2     The reason for the exclusion of oxidizing gases is that the use of ball valves as closures of high-pressure cylinders for oxidizing gases is known to lead to specific ignition hazards that cannot reasonably be mitigated through the ball valve design or type testing. Safety hazards concern both the ball valve itself and any downstream equipment. NOTE 3     The reason for the exclusion of acetylene for single gas cylinders, pressure drums and tubes is that the risk of an acetylene decomposition cannot reasonably be mitigated through the ball valve design or type testing. This document does not apply to ball valves for liquefied petroleum gas (LPG), cryogenic equipment, portable fire extinguishers and cylinders for breathing apparatus. NOTE 4     Requirements for valves for cryogenic vessels are specified in ISO 21011. NOTE 5     Certain specific requirements for quick-release valves for fixed fire-fighting systems in addition to those that are given in this document are specified in ISO 16003.

This document is applicable to pin-index yoke-type valve connections for medical gas cylinders, with
a working pressure up to a maximum of 200 bar or test pressure up to a maximum of 300 bar, or both.
NOTE 1 This type of connection is primarily used for small cylinders (5 l or below).
NOTE 2 In this document the unit bar is used, due to its universal use in the field of technical gases. It should,
however, be noted that bar is not an SI unit, and that the corresponding SI unit for pressure is Pa (1 bar = 105 Pa =
105 N/m2).
This document specifies:
— basic dimensions;
— requirements for alternative designs of the yoke-type valve connections;
— dimensions and positions for the holes and pins for the outlet connections.
It also specifies the dimensions and positions for the holes and pins for the outlet connections for gases
and gas mixtures.

This document specifies the requirements for design, specification, type testing and production testing
and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected
to transportable refillable LPG cylinders.
It also includes requirements for associated equipment for vapour and liquid service. Bursting discs
and/or fusible plugs are not covered in this document.
Annex B identifies requirements for production testing and inspection.
This document excludes other LPG cylinder devices which are not an integral part of the dedicated
manually operated cylinder valve.
This document does not apply to cylinder valves for fixed automotive installations and ball valves.
NOTE For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and
other liquefied gases see ISO 10297,[2] ISO 17871[6] or ISO 17879[7].

This document specifies definitions, dimensions and tolerances of parallel screw threads of M30 x 2,
M25 x 2 and M18 x 1,5, for the connection of valves to medical and industrial gas cylinders.
This document does not contain the connection requirements for:
— mechanical strength;
— gas tightness;
— capability of repeated assembly and dismounting operations (this aspect is covered in ISO 13341).

This document specifies the requirements for design, specification, type testing and production testing
and inspection for dedicated LPG self-closing cylinder valves for use with and directly connected to
transportable refillable LPG cylinders.
It also includes requirements for associated equipment for vapour and liquid service. Bursting discs
and/or fusible plugs are not covered in this document.
Annex A identifies requirements for production testing and inspection.
This document excludes other LPG cylinder devices which are not an integral part of the dedicated selfclosing
cylinder valve.
This document does not apply to cylinder valves for fixed automotive installations and ball valves.
NOTE For manually operated LPG cylinder valves see ISO 15995. For cylinder valves for compressed,
dissolved and other liquefied gases see ISO 10297, ISO 17871 or ISO 17879.

This European Standard specifies the construction characteristics, performances and marking related to safety and the rational use of energy of portable, flat gas appliances directly supplied at the LPG vapour pressure, incorporating a gas cartridge complying with EN 417, inserted horizontally in the chassis. This European standards covers appliances for outdoor or in well ventilated areas uses only.

This document specifies the requirements for design, specification, type testing and production testing and inspection of dedicated LPG manually operated cylinder valves for use with and directly connected to transportable refillable LPG cylinders. It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document. Annex B identifies requirements for production testing and inspection. This document excludes other LPG cylinder devices which are not an integral part of the dedicated manually operated cylinder valve. This document does not apply to cylinder valves for fixed automotive installations and ball valves. NOTE     For self-closing LPG cylinder valves see ISO 14245. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297,[2] ISO 17871[6] or ISO 17879[7].

This document specifies the requirements for design, specification, type testing and production testing and inspection for dedicated LPG self-closing cylinder valves for use with and directly connected to transportable refillable LPG cylinders. It also includes requirements for associated equipment for vapour and liquid service. Bursting discs and/or fusible plugs are not covered in this document. Annex A identifies requirements for production testing and inspection. This document excludes other LPG cylinder devices which are not an integral part of the dedicated self-closing cylinder valve. This document does not apply to cylinder valves for fixed automotive installations and ball valves. NOTE        For manually operated LPG cylinder valves see ISO 15995. For cylinder valves for compressed, dissolved and other liquefied gases see ISO 10297, ISO 17871 or ISO 17879.

This document specifies definitions, dimensions and tolerances of parallel screw threads of M30 x 2, M25 x 2 and M18 x 1,5, for the connection of valves to medical and industrial gas cylinders. This document does not contain the connection requirements for: —   mechanical strength; —   gas tightness; —   capability of repeated assembly and dismounting operations (this aspect is covered in ISO 13341).

This document specifies the requirements for periodic inspection and testing of welded steel transportable pressure drums of water capacity from 150 l up to 1 000 l and up to 300 bar test pressure intended for compressed and liquefied gases.

ISO 20475:2018 specifies the requirements for the periodic inspection and testing of cylinder bundles containing compressed, liquefied and dissolved gas.
NOTE Additional requirements for acetylene cylinder bundles are provided in Annex A.
ISO 20475:2018 also establishes general principles for the maintenance of cylinder bundles.
ISO 20475:2018 is not applicable to acetylene bundles with solvent-free acetylene cylinders.
ISO 20475:2018 excludes the requirements for cylinder bundles when they are a part of a battery vehicle. For some specific applications, e.g. offshore, additional requirements can apply.

This Technical Report contains information about monolithic porous materials used in individual acetylene cylinders and in acetylene cylinder bundles. It does not claim to be exhaustive.

This European Standard specifies minimum requirements for materials, design, construction and workmanship procedures, and tests for welded LPG road tanker pressure vessels and their welded attachments manufactured from carbon, carbon/manganese and micro alloy steels.
There is no upper size limit as this is determined by the gross vehicle weight limitation.
This European Standard does not cover pressure vessels for pressure vessel containers.
NOTE 1   In the context of this standard the term "road tanker" is understood to mean "fixed tanks" and "demountable tanks" as defined in ADR.
NOTE 2   The equipment for the pressure vessels and the inspection and testing after assembly is covered by EN 12252 and EN 14334, respectively.
NOTE 3   The design type of the road tanker is subject to approval by the competent authority, as required by ADR.
NOTE 4   This standard is intended for LPG only; however for other liquefied gases see EN 14025

This European Standard specifies the design, testing and marking requirements for spring loaded pressure relief valves (PRV), for use in liquefied petroleum gas (LPG) cylinders.
These PRVs can be either an integral part of a cylinder valve (see EN ISO 14245 [3] and EN ISO 15995 [4]) or a separate device.
This European Standard does not exclude the use of other designs of pressure relief devices that provide a similar level of safety.

This document specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at time of manufacture for: — type 3 fully wrapped cylinders or tubes with a load-sharing metal liner and composite reinforcement on both the cylindrical portion and the dome ends; — water capacities up to 450 l; — storage and conveyance of compressed or liquefied gases; — cylinders and tubes with composite reinforcement of carbon fibre, aramid fibre or glass fibre (or a mixture thereof) within a matrix; — a minimum design life of 15 years. This document does not address the design, fitting, and performance of removable protective sleeves. This document does not apply to cylinders with welded liners. NOTE 1 References to cylinders in this document 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.

This document specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at time of manufacture for: — type 2 composite hoop wrapped cylinders or tubes with a load-sharing metal liner and composite reinforcement on the cylindrical portion only; — water capacities up to 450 l; — the storage and conveyance of compressed or liquefied gases; — cylinders and tubes with composite reinforcement of carbon fibre, aramid fibre or glass fibre (or a mixture thereof) within a matrix or steel wire to provide circumferential reinforcement; — a minimum design life of 15 years. This document does not address the design, fitting, and performance of removable protective sleeves. NOTE 1 References to cylinders in this document 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.

This document specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at time of manufacture for: — type 4 composite fully wrapped cylinders or tubes with a non-load sharing liner and composite reinforcement on both the cylindrical portion and the dome ends; — type 5 fully wrapped cylinders or tubes without liners and with a test pressure of less than 60 bar and composite reinforcement on both the cylindrical portion and the dome ends; — water capacities up to 450 l; — for the storage and conveyance of compressed or liquefied gases; — cylinders and tubes with composite reinforcement of carbon fibre, aramid fibre or glass fibre (or a mixture thereof) within a matrix; — a minimum design life of 15 years. Cylinders and tubes manufactured and tested according to this document are not intended to contain toxic, oxidizing or corrosive gases. This document does not address the design, fitting and performance of removable protective sleeves. NOTE 1 References to cylinders in this document 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.

ISO 10298:2018 lists the best available acute-toxicity data of gases taken from a search of the current literature to allow the classification of gases and gas mixtures for toxicity by inhalation.

ISO 13338:2017 provides:
- for pure gases and some liquids, a complete list indicating their corrosiveness;
- for gas mixtures, a calculation method, in the absence of experimental data, relating to the corrosiveness of each of their components;
in order to determine the corrosiveness of gases and gas mixtures on tissue so that a suitable outlet connection can be assigned to each of them.

This Standard specifies the requirements for inspection before, during and after the time of filling for cylinder bundles for compressed and liquefied gases, also referred to as bundles.
This Standard does not apply to acetylene bundles.
This Standard does not apply to bundles when they are a part of a battery vehicle.

This document, in conjunction with ISO 10297 and ISO 14246, specifies design, type testing, marking
and manufacturing tests, and examinations requirements for quick-release cylinder valves intended to
be fitted to refillable transportable gas cylinders, pressure drums and tubes which convey:
— non-toxic;
— non-oxidizing;
— non-flammable; and
— non-corrosive;
compressed or liquefied gases or extinguishing agents charged with compressed gases to be used for
fire-extinguishing, explosion protection, and rescue applications.
NOTE 1 The main application of such quick-release cylinder valves is in the fire-fighting industry. However,
there are other applications such as avalanche airbags, life raft inflation and similar applications.
NOTE 2 Where there is no risk of ambiguity, gas cylinders, pressure drums and tubes are addressed with the
collective term “cylinders” within this document.
This document covers the function of a quick-release cylinder valve as a closure.
This document does not apply to quick-release cylinder valves for cryogenic equipment and for liquefied
petroleum gas (LPG).
This document does not apply to quick-release cylinder valves if used as the main closure of portable
fire extinguishers because portable fire extinguishers are not covered by transport regulation.
Quick-release cylinder valves of auxiliary refillable propellant gas cylinders used within or as part of
portable fire extinguishers are covered by this document, if these cylinders are transported separately,
e.g. for filling (see UN Model Regulations, Chapter 3.3, Special Provision 225, second note[1]).

This International Standard specifies the requirements for design, manufacture and testing of cylinders, tubes, and other pressure vessels of steel, stainless steel, aluminium alloys or of non-metallic construction material intended for the stationary storage of gaseous hydrogen of up to a maximum water capacity of 10 000 l and a maximum allowable working pressure not exceeding 110 MPa, of seamless metallic construction (Type 1) or of composite construction (Types 2, 3 and 4) without any non-seamless load sharing metallic components, hereafter referred to as pressure vessels.
For Existing design already qualified for other applications (e.g. transportable applications) follow the requirements of Annex E.
This International Standard is not intended as a specification for pressure vessels used for solid, liquid hydrogen or hybrid cryogenic-high pressure hydrogen storage applications.

This European Standard specifies minimum requirements for the materials, design, construction, prototype testing and routine manufacturing inspections of composite gas cylinders and tubes for compressed hydrogen. This standard applies only to fully wrapped composite cylinders with carbon fibres intended to be permanently mounted in a frame (e.g. bundle or trailer) with a test pressure of not less than 300 bar.
NOTE 1 This European Standard does not address the design, fitting and performance of removable
protective sleeves. Where these are fitted, they should be considered separately.

This document provides requirements for the selection of safe combinations of metallic cylinder and
valve materials and cylinder gas content.
The compatibility data given is related to single gases and to gas mixtures.
Seamless metallic, welded metallic and composite gas cylinders and their valves, used to contain
compressed, liquefied and dissolved gases are considered.
NOTE In this document the term “cylinder” refers to transportable pressure receptacles, which also include
tubes and pressure drums.
Aspects such as the quality of delivered gas product are not considered.

This document, in conjunction with ISO 10297 and ISO 14246, specifies design, type testing, marking and manufacturing tests, and examinations requirements for quick-release cylinder valves intended to be fitted to refillable transportable gas cylinders, pressure drums and tubes which convey: — non-toxic; — non-oxidizing; — non-flammable; and — non-corrosive; compressed or liquefied gases or extinguishing agents charged with compressed gases to be used for fire-extinguishing, explosion protection, and rescue applications. NOTE 1 The main application of such quick-release cylinder valves is in the fire-fighting industry. However, there are other applications such as avalanche airbags, life raft inflation and similar applications. NOTE 2 Where there is no risk of ambiguity, gas cylinders, pressure drums and tubes are addressed with the collective term "cylinders" within this document. This document covers the function of a quick-release cylinder valve as a closure. This document does not apply to quick-release cylinder valves for cryogenic equipment and for liquefied petroleum gas (LPG). This document does not apply to quick-release cylinder valves if used as the main closure of portable fire extinguishers because portable fire extinguishers are not covered by transport regulation. Quick-release cylinder valves of auxiliary refillable propellant gas cylinders used within or as part of portable fire extinguishers are covered by this document, if these cylinders are transported separately, e.g. for filling (see UN Model Regulations, Chapter 3.3, Special Provision 225, second note[1]).

This document provides specification and testing requirements for high pressure flexible hose assemblies intended to be connected to gas cylinders, bundles of cylinders or trailers (battery vehicles), and MEGCs for use when filling and emptying gas at production sites and also for customer use. This document applies to flexible hose assemblies with rated pressures up to 1 000 bar for use in the temperature range of −40 °C to +65 °C.
This document is not applicable to:
— rubber and plastics flexible hose assemblies for welding, cutting and related processes up to 45 MPa (450 bar) for customer use (see ISO 14113);
— high pressure flexible hose assemblies for use with medical gas systems for customer use (see ISO 21969);
— low pressure hose assemblies for use with medical gases for customer use (see ISO 5359);
— rubber and thermoplastic low pressure hose assemblies for welding, cutting and related processes for customer use (see ISO 3821 or ISO 12170);
— flexible hose assemblies for cryogenic applications (see ISO 21012);
— flexible hose assemblies for liquid petroleum gas (LPG).
NOTE Flexible hose assembly designs which pass the type test approval described in this document can have a lower ratio of burst pressure to rated pressure than stated in other standards.

This European Standard specifies procedures for periodic inspection and testing, for transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l.
This European Standard is applicable to the following:
-   welded steel LPG cylinders manufactured to an alternative design and construction, see EN 14140 or equivalent standard;
-   welded aluminium LPG cylinders, see EN 13110 or equivalent standard;
-   composite LPG cylinders, see EN 14427 or equivalent standard;
-   over-moulded cylinders designed and manufactured according to EN 1442 or EN 14140, see Annex F.
NOTE   The requirements of RID/ADR take precedence over those of this standard in the case of cylinders complying with that regulation, including pi marked cylinders.
This European Standard does not apply to cylinders permanently installed in vehicles.

This European Standard specifies procedures for the periodic inspection and testing, of transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l.
This European Standard is applicable to welded and brazed steel LPG cylinders with a specified minimum wall thickness designed according to EN 1442, EN 12807, EN 13322-1, or equivalent standard (e.g. national codes).
This European Standard is intended to be applied to cylinders complying with RID/ADR (including pi marked cylinders) and also to existing non RID/ADR cylinder populations.
NOTE   The requirements of RID/ADR take precedence over those of this standard in the case of cylinders complying with that regulation, including pi marked cylinders.
This European Standard does not apply to cylinders permanently installed in vehicles.

This document provides requirements for the selection of safe combinations of metallic cylinder and valve materials and cylinder gas content. The compatibility data given is related to single gases and to gas mixtures. Seamless metallic, welded metallic and composite gas cylinders and their valves, used to contain compressed, liquefied and dissolved gases are considered. NOTE In this document the term "cylinder" refers to transportable pressure receptacles, which also include tubes and pressure drums. Aspects such as the quality of delivered gas product are not considered.

EN ISO 10297 specifies design, type testing and marking requirements for: a) cylinder valves intended to be fitted to refillable transportable gas cylinders; b) main valves (excluding ball valves) for cylinder bundles; c) cylinder valves or main valves with integrated pressure regulator (VIPR); which convey compressed, liquefied or dissolved gases. NOTE 1 Where there is no risk of ambiguity, cylinder valves, main valves and VIPR are addressed with the collective term “valves” within this International Standard. This International Standard covers the function of a valve as a closure. This International Standard does not apply to - valves for cryogenic equipment, portable fire extinguishers and liquefied petroleum gas (LPG), and - quick-release valves (e.g. for fire-extinguishing, explosion protection and rescue applications), nonreturn valves or ball valves.