EN 12245:2002
(Main)Transportable gas cylinders - Fully wrapped composite cylinders
Transportable gas cylinders - Fully wrapped composite cylinders
This European Standard specifies minimum requirements for the materials, design, construction, prototype testing and routine manufacturing inspections of composite gas cylinders with a water capacity up to and including 450 l for compressed, liquefied and dissolved gases.
NOTE For the purposes of this standard, the word "cylinder" includes tubes up to 450 l water capacity
This standard is applicable to cylinders that comprise a liner of metallic material (welded or seamless) or non-metallic material (or a mixture thereof), reinforced by a wound composite consisting of fibres of glass, carbon or aramid (or a mixture thereof) embedded in a matrix.
This standard is also applicable to composite cylinders without liners.
This standard is not applicable to gas cylinders which are partially covered with fibres and commonly called "hoop wrapped" cylinders. For hoop wrapped composite cylinders see EN 12257.
NOTE The specification does not address the design, fitting and performance of removable protective sleeves. Where these are fitted they should be considered separately.
Ortsbewegliche Gasflaschen - Vollumwickelte Flaschen aus Verbundwerkstoffen
Diese Norm enthält Mindestanforderungen an die Werkstoffe, die Gestaltung, Konstruktion, die Bauartprüfungs-, Baureihen- und Abnahmeprüfungen von Flaschen aus Verbundwerkstoffen mit einem Fassungsraum bis zu 450 Liter für verdichtete, verflüssigte und unter Druck gelöste Gase.
ANMERKUNG Für die Anwendung dieser Norm umfasst das Wort "Flasche" auch Großflaschen mit einem Fassungsraum bis zu 450 Litern.
Diese Norm ist auf Flaschen anwendbar, die aus einem Liner mit metallischem Werkstoff (geschweißt oder nahtlos) oder mit nicht-metallischem Werkstoff (oder einer Kombination aus beidem) bestehen, und die mit einem in einer Matrix eingebetteten Wickelverbund aus Glas-, Kohlenstoff-, Aramid- oder sonstigen Faserwerkstoffen verstärkt sind.
Diese Norm gilt auch für Flaschen aus Verbundwerkstoff ohne Liner.
Die vorliegende Norm gilt nicht für Gasflaschen, die teilweise mit Faserwerkstoffen eingehüllt sind und allgemein als "umfangsumwickelte" Flaschen bezeichnet werden, für diese gilt EN 12257.
ANMERKUNG Diese Spezifikationen beinhalten nicht die Gestaltung, Verbindung und Durchführung von abnehmbaren Schutzhüllen. Die Verbindung sollte separat betrachtet werden.
Bouteilles à gaz transportables - Bouteilles entièrement bobinées en matériaux composites
La présente norme spécifie les exigences minimales relatives aux matériaux, à la conception, à la construction, aux essais de qualification de modèle et aux contrôles courants de production, des bouteilles à gaz composites, d'une contenance en eau inférieure ou égale à 450 l, pour gaz comprimés, liquéfiés et dissous.
NOTE Pour les besoins de la présente norme, le mot « bouteille » englobe les tubes d'une contenance en eau inférieure ou égale à 450 l.
La présente norme s'applique aux bouteilles constituées d'un liner métallique (avec ou sans soudure), ou non métallique (ou constitué d'un mélange de ces matériaux), renforcé par un enroulement composite en fibres de verre, de carbone ou d'aramide (ou un mélange de ces matériaux) noyées dans une matrice.
La présente norme s'applique également aux bouteilles à gaz en composite sans liner.
La présente norme ne s'applique pas aux bouteilles à gaz partiellement recouvertes de fibres et couramment appelées "bouteilles frettées". Pour les bouteilles frettées composite, voir l'EN 12257.
NOTE Cette spécification ne traite pas de la conception, du montage et des performances des gaines de protection amovibles. Lorsque celles-ci sont montées, il convient de les considérer séparément.
Premične plinske jeklenke - Popolnoma obvite jeklenke iz kompozitnih mas
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ortsbewegliche Gasflaschen - Vollumwickelte Flaschen aus VerbundwerkstoffenBouteilles a gaz transportables - Bouteilles entierement bobinées en matériaux compositesTransportable gas cylinders - Fully wrapped composite cylinders23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 12245:2002SIST EN 12245:2002en01-november-2002SIST EN 12245:2002SLOVENSKI
STANDARD
SIST EN 12245:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12245February 2002ICS 23.020.30English versionTransportable gas cylinders - Fully wrapped composite cylindersBouteilles à gaz transportables - Bouteilles entièrementbobinées en matériaux compositesOrtsbewegliche Gasflaschen - Vollumwickelte Flaschenaus VerbundwerkstoffenThis European Standard was approved by CEN on 9 November 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12245:2002 ESIST EN 12245:2002
EN 12245:2002 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms, definitions and symbols.74Design and manufacture.95Cylinder and material tests.136Conformity evaluation.297Marking.29Annex A (normative)
Prototype testing, design variant testing and production testing.30Annex B (informative)
Examples of type approval and production testing certificates.42Bibliography.48SIST EN 12245:2002
EN 12245:2002 (E)3ForewordThis document EN 12245:2002 has been prepared by Technical Committee CEN/TC 23"Transportable gas cylinders", the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by August 2002, and conflicting national standards shallbe withdrawn at the latest by August 2002.This European Standard has been prepared under a mandate given to CEN by the EuropeanCommission and the European Free Trade Association, and supports the objectives of the frameworkDirectives on Transport of Dangerous Goods.This European Standard has been submitted for reference into the RID and/or the technical annexesof the ADR. Therefore in this context the standards listed in the normative references and coveringbasic requirements of the RID/ADR not addressed within the present standard are normative onlywhen the standards themselves are referred to in the RID and/or the technical annexes of the ADR.Annex A is normative, annex B is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 12245:2002
EN 12245:2002 (E)4IntroductionThe purpose of this standard is to provide a specification for the design, manufacture, inspection andtesting of refillable, transportable fully wrapped composite cylinders.The specifications given are based on knowledge of, and experience with, materials, designrequirements, manufacturing processes and control during manufacture of cylinders in common use inthe countries of the CEN members.SIST EN 12245:2002
EN 12245:2002 (E)51 ScopeThis European Standard specifies minimum requirements for the materials, design, construction,prototype testing and routine manufacturing inspections of composite gas cylinders with a watercapacity up to and including 450 l for compressed, liquefied and dissolved gases.NOTEFor the purposes of this standard, the word “cylinder” includes tubes up to 450 l water capacityThis standard is applicable to cylinders that comprise a liner of metallic material (welded or seamless)or non-metallic material (or a mixture thereof), reinforced by a wound composite consisting of fibres ofglass, carbon or aramid (or a mixture thereof) embedded in a matrix.This standard is also applicable to composite cylinders without liners.This standard is not applicable to gas cylinders which are partially covered with fibres and commonlycalled "hoop wrapped" cylinders. For hoop wrapped composite cylinders see EN 12257.NOTEThe specification does not address the design, fitting and performance of removable protectivesleeves. Where these are fitted they should be considered separately.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from otherpublications. These normative references are cited at the appropriate place in the text, and thepublications are listed hereafter. For dated references, subsequent amendments to or revisions of anyof these publications apply to this European Standard only when incorporated in it by amendment orrevision. For undated references the latest edition of the publication referred to applies (includingamendments).EN 720-2, Transportable gas cylinders — Gases and gas mixtures — Part 2: Determination offlammability and oxidising potential of gases and gas mixtures.EN 1089-1, Transportable gas cylinders — Gas cylinder identification (excluding LPG) —Part 1: Stampmarking.EN 1964-1, Transportable gas cylinders — Specification for the design and construction of refillabletransportable seamless steel gas cylinders of water capacities from 0,5 litres up to and including 150litres — Part 1: Cylinders made of seamless steel with an Rm value of less than 1100 MPa.prEN 1964-2, Transportable gas cylinders — Specification for the design and construction of refillabletransportable seamless steel gas cylinders from 0,5 litres up to and including 150 litres — Part 2:Tensile strength (Rm max)
1100 MPa.EN 1964-3, Transportable gas cylinders — Specification for the design and construction of refillabletransportable seamless steel gas cylinders of water capacities from 0,5 litres up to and including 150litres — Part 3: Stainless steel cylinders.EN 1975, Transportable gas cylinders — Specification for the design and construction of refillabletransportable seamless aluminium and aluminium alloy gas cylinders of capacity from 0,5 l up to 150 l.EN 12862, Transportable gas cylinders — Refillable transportable welded aluminium alloy gascylinders.SIST EN 12245:2002
EN 12245:2002 (E)6prEN 13322-1, Transportable gas cylinders — Refillable transportable welded steel gas cylinders —Part 1: Welded steel.prEN 13322-2, Transportable gas cylinders — Refillable transportable welded stainless steel gascylinders — Part 2: Welded stainless steel.EN ISO 11114-1, Transportable gas cylinders — Compatibility of cylinder and valve materials with gascontents — Part 1: Metallic Materials (ISO 11114-1:1997).EN ISO 11114-2, Transportable gas cylinders — Compatibility of cylinder and valve materials with gascontents — Part 2: Non-metallic Materials (ISO 11114-2:2000).EN ISO 11114-3, Transportable gas cylinders — Compatibility of cylinder and valve materials with gascontents — Part 3: Autogenous ignition test in oxygen atmosphere (ISO 11114-3:1997).EN ISO 11120, Gas cylinders — Refillable seamless steel tubes for compressed gas transport, ofwater capacity between 150 l and 3000 l — Design, construction and testing (ISO 11120:1999).EN ISO 13341, Fitting of valves to gas cylinders (ISO 13341:1997).ISO 75-1, Plastics — Determination of temperature of deflection under load — Part 1: General testmethod.ISO 75-3, Plastics — Determination of temperature of deflection under load — Part 3: High-strengththermosetting laminates and long-fibre-reinforced plastics.ISO 175, Plastics — Determination of the effects of liquid chemicals, including water.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 andextrusion plastics.ISO 1133, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate(MVR) of thermoplastics.ISO 1183, Plastics — Methods of determining the density and relative density of non-cellular plastics.ISO 1628-3, Plastics — Determination of viscosity number and limiting viscosity number —Part 3: Polyethylenes and polypropylenes.ISO 2884-1, Paints and varnishes — Determination of viscosity using rotary viscometers — Part 1:Cone-and-plate viscometer operated at a high rate of shear.ISO 3146, Plastics — Determination of melting behaviour (melting temperature or melting range) ofsemi-crystalline polymers.ISO 10156, Gases and gas mixtures — Determination of fire potential and oxidizing ability for theselection of cylinder valve outlets.ISO 15512, Plastics - Determination of water content.ASTM D 2196-86, Test methods for rheological properties of non-newtonian materials by rotational(Brookfield) viscometer.ASTM D 2290-92, Test method for apparent tensile strength of ring or tubular plastics and reinforcedplastics by split disk method.SIST EN 12245:2002
EN 12245:2002 (E)7ASTM D 2291-83, Fabrication of ring test specimens for glass-resin composites.ASTM D 2343-95, Test method for tensile properties of glass fibre strands, yarns and rovings used inreinforced plastics.ASTM D 2344-84, Test method for apparent interlaminar shear strength of parallel fiber compositesby short beam method.ASTM D 4018-93, Test methods for tensile properties of continuous filament carbon and graphite fibretows.3 Terms, definitions and symbols For the purposes of this European standard, the following terms, definitions and symbols apply.3.1 Terms and definitions3.1.1ambient temperaturetemperature of surroundings varying between 10 °C and 35 °C (for test purposes only)3.1.2autofrettagepressure application procedure which strains the metal liner past its yield point sufficiently to causepermanent plastic deformation, and results in the liner having compressive stresses and the fibreshaving tensile stresses when at zero internal gauge pressure3.1.3batch, (of fibres or components of the resin system)homogeneous quantity of material, identified and certified as such by the supplier3.1.4batch, (of metallic liners)quantity of liners of the same nominal diameter, thickness, length and design, made successively fromthe same material cast and subjected to the same heat treatment for the same length of time3.1.5batch, (of non-metallic liners)quantity of liners of the same nominal diameter, thickness, length and design, made successively fromthe same batch of materials and subjected to the same manufacturing process3.1.6batch, (of finished cylinders with liners)quantity of up to 200 finished cylinders, plus cylinders for destructive testing, of the same nominaldiameter, thickness, length and design. The batch may contain different batches of liners (providingthe batches are nominally the same and have had the same treatments), fibres and matrix materials3.1.7batch, (of finished cylinders with no liners)production quantity of up to 200 finished cylinders, plus cylinders for destructive testing, of the samenominal diameter, thickness, length and design3.1.8burst pressurehighest pressure reached in a cylinder or liner during the relevant burst testSIST EN 12245:2002
EN 12245:2002 (E)83.1.9composite overwrapfibres and matrix taken together as a combined unit3.1.10elastomermaterial which at ambient temperature can be stretched repeatedly to at least twice its original lengthand will return with force to approximately its original length immediately upon release of the stress3.1.11exterior coatinglayer of clear or pigmented material applied to the cylinder as protection or for cosmetic purposes3.1.12fibre or strandload-carrying part of the composite overwrap e.g. glass, aramid or carbon3.1.13fully wrapped cylindercylinder reinforced by wrapping to take both circumferential and longitudinal stress3.1.14linermetallic or non-metallic vessel that contains the gas but may also contribute to the mechanicalbehaviour of the cylinder3.1.15non-load sharing linerliner that contributes less than 5 % of the load bearing of the overall cylinder design at test pressure,and is intended only to prevent diffusion of the contained gas3.1.16non-metallic linerliner made from thermoplastic, thermosetting, or elastomer material3.1.17cylinder without linercylinder having no liner and consisting wholly of the composite winding3.1.18matrixmaterial which is used to bind and hold the fibres in place3.1.19rejected cylindercylinder which in its present condition has not passed the test requirements3.1.20thermoplasticplastics capable of being repeatedly softened by increase of temperature and hardened by decreaseof temperature3.1.21thermosetplastics which when cured by the application of heat or chemical means change into a substantiallyinfusible and insoluble productSIST EN 12245:2002
EN 12245:2002 (E)93.2 Symbolspbactual burst pressure of composite cylinder, in bar1) above atmospheric pressurepbL burst pressure of liner, in bar1) above atmospheric pressurepbminminimum burst pressure of composite cylinder obtained during design variant approvaltesting, in bar1) above atmospheric pressurephhydraulic test pressure of composite cylinder, in bar1) above atmospheric pressure4 Design and manufacture4.1 General4.1.1A fully wrapped composite gas cylinder may be manufactured with a metallic or non-metallicliner or without a liner. Cylinders without a liner may be manufactured from two parts joined togetherwith adhesive. An optional exterior coating may be used to provide external protection and when thisis an integral part of the design shall be permanent.The cylinder may also include additional parts such as rings, bases, etc.4.1.2Cylinders shall be designed with one or two openings along the central axis only.4.2 Liner4.2.1 Metallic liners Metallic liners shall be manufactured in accordance with the relevant sections of the followingEuropean Standards:a) seamless steel liners:EN 1964-1 or prEN 1964-2, as appropriate;b) seamless stainless steel liners:EN 1964-3;c) seamless aluminium alloy liners: EN 1975;d) welded steel liners:prEN 13322-1;e) welded stainless steel liners: prEN 13322-2;f) welded aluminium liners:EN 12862;g) steel tubes (i.e. >150 l):EN ISO 11120.The relevant sections are those covering: materials, thermal treatments, neck design, constructionand workmanship, mechanical tests.NOTEThis excludes the design requirements, since these are specified by the manufacturer for the designof the composite cylinder. For liners with water capacity above 150 l manufactured of stainless steel, aluminiumor welded steel the relevant sections of the appropriate standard also apply.
1)1 bar = 105 Pa = 0,1 MPa.SIST EN 12245:2002
EN 12245:2002 (E)10The liner material shall be compatible with the gases intended to be used as determined byEN ISO 11114-1.4.2.2 Non-metallic liners4.2.2.1A cylinder with a non-metallic liner shall be designed as if the liner will be non-loadsharing. The liner material shall be compatible with the gases intended to be used as determined byEN ISO 11114-2.4.2.2.2Where a metal end boss is used in a non-metallic liner, it shall be considered part of theliner material and shall fulfil the material requirements specified in the relevant standard, as listed in4.2.1.The drawing of the liner shall include the specification of the material and material properties of theboss. The following material properties important for design shall be specified in the design as follows: minimum yield stress; minimum tensile strength; minimum elongation of the boss material; compatibility with the contained gas as determined by EN ISO 11114-1.The metal end boss bearing the cylinder thread shall be designed to withstand the torque applied infitting the valve to the cylinder and the tests specified in Test No 16 (see 5.2.16) and Test No 17(see 5.2.17).4.2.3 Design drawingA fully dimensioned drawing of the liner shall be supplied which includes the specification of thematerial and material properties. The following material properties shall be specified:a) for metallic liners: minimum yield stress; minimum tensile strength; minimum elongation; minimum burst pressure; compatibility with the contained gas as determined by EN ISO 11114-1.b) for non-metallic liners: density; melting point, as determined by:— ISO 3146 for thermoplastics; or— ISO 75-1 and ISO 75-3 for thermoset materials; auto-ignition temperature in oxygen as determined by EN ISO 11114-3 (for cylinders foroxidising gases only);SIST EN 12245:2002
EN 12245:2002 (E)11 glass transition temperature as determined by differential scanning calorimetry; composition; compatibility with the contained gas as determined by EN ISO 11114-2; end boss design in accordance with 4.2.2.2.4.2.4 Design of endsThe external diameter and thickness of the formed neck end of the liner shall be designed towithstand the torque applied in fitting the valve to the cylinder and the tests specified in Test No 16(see 5.2.16) and Test No 17 (see 5.2.17).4.2.5 Neck ringWhen a neck ring is provided, it shall be of a material compatible with that of the cylinder, and shall besecurely attached by a method appropriate to the liner (or cylinder for linerless cylinders) or bossmaterial.4.3 Composite overwrap4.3.1 MaterialsMaterial requirements for the fibre and the matrix shall be as specified by the manufacturer.4.3.2 WindingAppropriate procedures shall be defined for the winding and curing process to ensure goodrepeatability and traceability.The following parameters shall be defined and monitored: percentages of the components of the matrix system and their batch numbers; the batch numbers of the fibres used; the number of strands used; the winding tension per strand, (if applicable); the winding speed(s); the winding angle and/or pitch for each layer; resin bath temperature range, (if applicable); the number and order of layers; the procedure used to obtain correct impregnation (e.g. wet winding or pre-impregnation); the polymerisation cycle; the polymerisation process (e.g. thermal cycling, ultrasonic, ultraviolet, or radiation).SIST EN 12245:2002
EN 12245:2002 (E)12For thermal polymerisation, the temperature and the length of the polymerisation cycle of the resinsystem shall be such that they do not adversely affect the mechanical characteristics of the liner. Inaddition, tolerances for holding time and temperature at each stage shall be defined.4.3.3 Cylinders without liners comprising two or more partsFor cylinders without liners which comprise two parts joined with adhesive, additional procedures andparameters shall be defined, monitored and recorded as follows: percentages of the components of the adhesive system and their batch numbers; polymerisation cycle; polymerisation process (e.g. thermal cycling, ultrasonic,
ultraviolet, or radiation).4.4 Finished cylinder4.4.1 Design drawingsA fully dimensioned drawing of all parts that constitute the finished cylinder shall be supplied. Thedesign drawing shall also include tolerances on all dimensions, including out-of-roundness andstraightness.The drawing shall include the specification of the material(s), the material properties and thereinforcement pattern. The specifications and the reinforcement patterns may be given in a technicalspecification enclosed with the drawing.The details of an exterior coating, if it is an integral part of the design, shall be defined.The test pressure, autofrettage pressure (if applicable) and minimum burst pressure for the designshall be specified. The minimum burst pressure shall be at least 2
test pressure (ph).Any special characteristics or special limitations (e.g. design life, underwater suitability, vacuumsuitability and/or maximum fitting torque restrictions) shall also be stated.4.4.2 Cylinders without linerThe composition of the composite materials and also their properties shall be specified, as follows: tensile strength; tensile modulus; elongation; heat distortion temperature; viscosity.The composite materials shall be compatible with the contained gas as determined by EN ISO 11114-2. The auto-ignition temperature in oxygen gas shall be determined in accordance withEN ISO 11114-3.SIST EN 12245:2002
EN 12245:2002 (E)13Where a metal end boss is used in a cylinder without liner the drawing of the cylinder shall include thespecification of the material and material properties of the boss in accordance with 4.2.2.2.4.4.3 AutofrettageInternal pressurisation to autofrettage pressure of cylinders with metallic liners can be part of themanufacturing process; if so this operation shall be executed after polymerisation of the composite forthermosetting resins.During the autofrettage operation, the following parameters shall be recorded: autofrettage pressure; length of application of this pressure; expansion at autofrettage pressure; permanent expansion after autofrettage.If autofrettage is performed, a check shall be made that the procedure has been effectively performedon all cylinders.4.4.4 Manufacturing requirements for the finished cylinderThe internal and external surfaces of the finished cylinder shall be free of defects which can adverselyaffect the safe working of the cylinder. In addition there shall be no visible foreign matter presentinside the cylinder (e.g. resin, swarf or other debris).4.5 Liquefied gasesCylinders intended to contain non-toxic, non-flammable liquefied gases shall be fitted with a burstingdisc designed to operate below 1,15 ph.5 Cylinder and material tests5.1 GeneralThis clause describes tests to be conducted on fully wrapped composite cylinders, cylinder liners andthe materials used in manufacture of cylinders for prototype testing of new cylinder designs, designvariant testing and production testing. The tests listed can be required or optional, as identified in theschedule of testing and inspections in annex A. No tests shall be performed with a removable protective sleeve fitted to the cylinder.5.2 Test procedures and test requirements5.2.1 Test No 1 - Composite material tests, including adhesives (where applicable)Tests shall be carried out on composite materials as follows:a) On all cylinders:SIST EN 12245:2002
EN 12245:2002 (E)14 Procedure:Tests on the composite materials to establish their mechanical properties shall be carried out inaccordance with the following procedures:i)Tensile properties of fibres:For glass, aramid:- ASTM D 2290-92 & ASTM D 2291-83;- ASTM D 2343-95;For carbon:- ASTM D 4018-93.ii)Shear properties: - ASTM D 2344-84.Equivalent tests in accordance with alternative standards or test specifications acceptable tothe inspection body may be applied.Criteria:The mechanical properties shall meet the minimum requirements for the design as specified bythe manufacturer.b)
Additional tests on cylinders without liners: Procedure:Additional tests on the composite materials and adhesives (if applicable) to establish their otherphysical properties shall be carried out in accordance with the following procedures:Tensile strength- ISO 527-1 and ISO 527-2Tensile modulus- ISO 527-1 and ISO 527-2Elongation- ISO 527-1 and ISO 527-2Heat distortion temperature- ISO 3146 for thermoplastics and ISO 75-1 andISO 75-3 for thermoset materials;Auto-ignition temperature in oxygen- prEN ISO 11114-3 (for oxidising gases only)Viscosity- ISO 1628-3 for thermoplastics and ISO 2884-1 orASTM D 2196-86 for thermosetsComposition- Test specification acceptable to the inspection bodyEquivalent tests in accordance with alternative standards or test specifications acceptable tothe inspection body may be applied.Criteria:The mechanical properties shall meet the minimum requirements for the design as specified bythe manufacturer.5.2.2 Test No 2 - Liner material testsProcedure:Tests on the liner material shall be carried out, following the test procedures of the appropriatestandards as follows:a) Seamless steel - as described in EN 1964-1, prEN 1964-2 or EN ISO 11120, as appropriate;SIST EN 12245:2002
EN 12245:2002 (E)15b) Seamless stainless steel- as described in EN 1964-3;c) Welded steel- as described in prEN 13322-1;d) Seamless aluminium- as described in EN 1975;e) Welded stainless steel- as described in prEN 13322-2;f) Welded aluminium- as described in EN 12862;g) Non-metallic- as follows:1) Thermoplastic materials: Viscosity- ISO 1628-3 Melting point- ISO 3146 Water content- ISO 15512 Density- ISO 1183 Melting flow index- ISO 1133 Chemical resistance- ISO 175 2) Thermoset and elastomeric materials:Viscosity- ISO 2884-1 or ASTM D 2196-86Elongation at break- ISO 527-1 and ISO 527-2Tensile strength- ISO 527-1 and ISO 527-2Density- ISO 1183Chemical resistance- ISO 175Equivalent tests in accordance with alternative standards or test specifications acceptable tothe inspection body may be applied.Criteria:The mechanical properties shall meet the minimum requirements for the design as specified bythe manufacturer.5.2.3 Test No 3 - Liner burst test at ambient temperature.Procedure:The hydraulic burst test shall be carried out using a test rig, which allows pressure to beincreased at a controlled rate.The test shall be carried out in ambient conditions and the temperature on the external surfaceof the liner shall be maintained at less than 50 °C. The rate of pressurisation shall not exceed10 bar/s and the duration of the test shall be at least 40 s.The cylinder shall be pressurised at a controlled rate until failure. The pressure against timecurve or pressure against volume curve shall be plotted.SIST EN 12245:2002
EN 12245:2002 (E)16The maximum pressure achieved during the test shall be recorded as the burst pressure.Criteria: burst pressure of the liner (pbl) shall be equal to or greater than the minimum design burstpressure, as specified in 4.2.3; burst initiation shall be in the cylindrical part and the liner shall remain in one piece.Parameters to monitor and record: burst pressure; the number of pieces; description of failure; pressure/time curve or pressure/volume curve.5.2.4 Test No 4 - Hydraulic (proof) test of finished cylinders at ambient temperatureProcedure:Where cylinders are subjected to autofrettage the hydraulic proof pressure test mayimmediately follow or be part of the autofrettage operation.The water pressure in the cylinder shall be increased at a controlled rate until the test pressure(ph) is reached. The cylinder shall remain at the test pressure (ph) for at least 30 s.The limit deviation on attaining test pressure shall be test pressure%30 (ph).Criteria: pressure shall remain steady; there shall be no leaks; after the test the cylinder shall show no visible permanent deformation.Parameters to monitor during the test: pressure.5.2.5 Test No 5 - Cylinder burst testProcedure:The hydraulic pressure burst test shall be carried out using a test rig, which allows pressure to beincreased at a controlled rate.The test shall be carried out in ambient conditions and the temperature on the external surface of thecylinder shall be maintained at less than 50 °C. The rate of pressurisation shall not exceed 10 bar/sand the duration of the test shall be at least 40 s.SIST EN 12245:2002
EN 12245:2002 (E)17The cylinder shall be pressurised at a controlled rate until failure. The pressure against time curve orpressure against volume curve shall be plotted.The maximum pressure achieved during the test shall be recorded as the burst pressure.Criteria: burst pressure shall be greater than or equal to the manufacturer's minimum specified designburst pressure and 2
test pressure
(pb
2,0 ph); burst initiation shall be in the cylindrical part, and the liner (if any) shall fail into not more thanthree pieces. Damage through impact during the
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