SIST EN 12863:2002
(Main)Transportable gas cylinders - Periodic inspection and maintenance of dissolved acetylene cylinders
Transportable gas cylinders - Periodic inspection and maintenance of dissolved acetylene cylinders
This European Standard specifies seamless and welded steel or seamless aluminium alloy cylinders intended for the transport of acetylene in cylinders of water capacity up to 150 l and specifies the requirements for the periodic inspection and maintenance of acetylene cylinders, regardless of the method of manufacture of the shell.
This European Standard also applies to solvent free acetylene cylinders.
This European Standard also specifies a procedure to qualify existing gas cylinders for free movement between member states of the European Union (see annex A).
Ortsbewegliche Gasflaschen - Wiederkehrende Prüfung und Instandhaltung von Gasflaschen für gelöstes Acetylen
Die vorliegende Europäische Norm behandelt nahtlose oder geschweißte Gasflaschen aus Stahl oder Gasflaschen aus Aluminiumlegierungen mit einer Wasserkapazität bis 150 l für den Transport von gelöstem Acetylen und behandelt unabhängig vom Herstellungsverfahren des Flaschenkörpers die Anforderungen an die wiederkehrende Prüfung und Instandhaltung von Acetylen-Gasflaschen.
Bouteilles a gaz transportables - Contrôle et entretien périodiques des bouteilles d'acétylene dissous
Domaine d'application
La présente Norme européenne traite des bouteilles en acier soudées ou sans soudure, ou en alliage d'aluminium sans soudure, destinées au transport d'acétylene dans les bouteilles d'une contenance maximale en eau de 150 l et prescrit les exigences concernant le contrôle et l'entretien périodique des bouteilles d'acétylene, quelle que soit la méthode de fabrication utilisée pour le corps de la bouteille.
La présente Norme européenne s'applique également aux bouteilles d'acétylene sans solvant.
La présente norme définit également une méthode de qualification des bouteilles a gaz existantes pour la libre circulation entre les états membres de l'Union Européenne (voir annexe A).
Premične plinske jeklenke - Periodični nadzor in vzdrževanje jeklenk za raztopljeni acetilen
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DFHWLOHQOrtsbewegliche Gasflaschen - Wiederkehrende Prüfung und Instandhaltung von Gasflaschen für gelöstes AcetylenBouteilles a gaz transportables - Contrôle et entretien périodiques des bouteilles d'acétylene dissousTransportable gas cylinders - Periodic inspection and maintenance of dissolved acetylene cylinders23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 12863:2002SIST EN 12863:2002en01-november-2002SIST EN 12863:2002SLOVENSKI
STANDARD
SIST EN 12863:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12863June 2002ICS 23.020.30English versionTransportable gas cylinders - Periodic inspection andmaintenance of dissolved acetylene cylindersBouteilles à gaz transportables - Contrôle et entretienpériodiques des bouteilles d'acétylène dissousOrtsbewegliche Gasflaschen - Wiederkehrende Prüfungund Instandhaltung von Gasflaschen für gelöstes AcetylenThis European Standard was approved by CEN on 6 March 2002.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 12863:2002 ESIST EN 12863:2002
EN 12863:2002 (E)2ContentspageForeword.3Introduction.41Scope.52Normative references.53Terms and definitions.54General.65Preparation of gas cylinder.76Inspection and maintenance.87Identification of content.118Markings.119Records.1110Disposal of unserviceable cylinders.12Annex A (informative)
Acetylene cylinders manufactured according to National Regulations.13Annex B (informative)
Procedure to be adopted when a cylinder valve is suspected to beobstructed.15Annex C (normative)
Description, evaluation of defects and conditions for rejection of acetylenegas cylinders at time of visual inspection.18Annex D (informative)
Tools and clearance gauges and diagrammatic illustration of the top of(monolithic and non-monolithic) acetylene cylinders.22Annex E (informative)
Inspection and maintenance of valves and their connections.24Bibliography.25SIST EN 12863:2002
EN 12863:2002 (E)3ForewordThis document EN 12863:2002 has been prepared by Technical Committee CEN/TC 23 "Transportable gascylinders", the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by December 2002, and conflicting national standards shall be withdrawnat the latest by December 2002.This European Standard has been submitted for reference into the RID and/or in the technical annexes of theADR. Therefore in this context the standards listed in the normative references and covering basic requirementsof the RID/ADR not addressed within the present standard are normative only when the standards themselvesare referred to in the RID and/or in the technical annexes of the ADR.In this standard the annexes A, B, D and E are informative. Annex C is normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Spain, Sweden, Switzerland and the United Kingdom.SIST EN 12863:2002
EN 12863:2002 (E)4IntroductionAcetylene cylinders differ from all other cylinders transporting compressed or liquefied gases because theycontain a porous mass and normally a solvent in which the acetylene stored is dissolved. However, for specialapplications there exist some acetylene cylinders containing a porous mass and no solvent. For the periodicinspection cycle, due regard should be given to the different types of construction of cylinders and porousmasses. The remainder of this document should be read considering these differences.The primary objective of the presence of the porous mass is to limit an acetylene decomposition, should it beinitiated, and thus prevent a cylinder incident. If some porous mass is missing, or if a defect (e.g. a cavity, crackor void of significant size) exists as a result of breakdown or subsidence of the porous mass, then thedecomposition could progress at a rate which can cause a violent failure of the cylinder.SIST EN 12863:2002
EN 12863:2002 (E)51 ScopeThis European Standard specifies seamless and welded steel or seamless aluminium alloy cylinders intendedfor the transport of acetylene in cylinders of water capacity up to 150 l and specifies the requirements for theperiodic inspection and maintenance of acetylene cylinders, regardless of the method of manufacture of theshell.This European Standard also applies to solvent free acetylene cylinders.This European Standard also specifies a procedure to qualify existing gas cylinders for free movement betweenmember states of the European Union (see annex A).2 Normative referencesThis European Standard incorporates by dated or undated reference provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter.For dated references, subsequent amendments to or revisions of any of these publications apply to thisEuropean Standard only when incorporated in it by amendment or revision. For undated references the latestedition of the publication referred to applies (including amendments).EN 1800:1998, Transportable gas cylinders — Acetylene cylinders — Basic requirements and definitions.EN 1089-1, Transportable gas cylinders — Gas cylinder identification (excluding LPG) — Part 1:Stampmarking.EN 1089-2, Transportable gas cylinders — Gas cylinder identification (excluding LPG) — Part 2: Precautionarylabels.EN 1089-3, Transportable gas cylinders — Cylinder identification — Part 3: Colour coding system.EN ISO 13341, Transportable gas cylinders — Fitting of valves to gas cylinders (ISO 13341:1997).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1cylinder shellpressure vessel manufactured for storage and transport and suitable for containing a porous mass, a solvent,where relevant, and acetylene3.2complete cylindercylinder shell ready to be charged with acetylene gas, which is complete with porous mass, solvent where relevant,saturation gas, valve, and any valve protection permanently fixed to the cylinder shell3.3porous masssingle or multi-component substance introduced into, or formed in the cylinder shell, in order to fill it and due to itsporosity allow the absorption of the solvent and acetylene gas. The porous mass can be of two typesa) a non-monolithic porous substance consisting of granular, fibrous or similar substances without the additionof any binding materials;SIST EN 12863:2002
EN 12863:2002 (E)6b) a monolithic porous substance consisting of materials having reacted to form a compact product or ofmaterials connected together through a binding compound(s). This type of porous substance may bemanufactured with a controlled clearance between the shell and the substance (see annex D)3.4porosityratio expressed in percentage of the volume of the solvent, which can be filled in the cylinder equipped with theporous mass, to the water capacity of this cylinder without porous mass (determined according to annex B ofEN 1800:1998)3.5solventliquid which is absorbed by the porous mass and is capable of dissolving and releasing the acetylene gas3.6saturation gasmass of acetylene dissolved in the solvent in the cylinder at atmospheric pressure and 15 °C3.7tare weightfor acetylene cylinders the tare weight is expressed by indicating weights corresponding to:3.7.1tare Asum of the empty weight of the cylinder shell, the porous mass, the specified mass of solvent, the valve and themass of all other parts which are permanently attached (e.g. by clamping or bolting) to the cylinder when it isgoing to be filled3.7.2tare STARE A plus the weight of acetylene required to saturate the solvent at atmospheric pressure and at atemperature of 15 °C3.7.3tare Ffor solvent free acetylene cylinders the tare weight is expressed by indicating a TARE F, where TARE F of anacetylene cylinder is TARE A minus the weight of solvent4 General4.1 Requirements for inspectionThe periodic inspection of acetylene cylinders shall be carried out only by competent and trained persons whoshall ensure that the cylinders are fit for continued safe use.NOTEA competent person is a person who has the necessary technical knowledge, experience and authority toassess and approve materials for use with gases and to define any special conditions of use that are necessary. Such aperson will also normally be formally qualified in an appropriate technical discipline.Due to the presence of a porous mass in the cylinder neither a pressure test (hydraulic or pneumatic) nor avisual inspection of the internal surface of the shell, is required by this standard.Where cylinders are manufactured according to National Regulations and are intended to be qualified under theTransportable Pressure Equipment Directive (TPED) for free movement and use between member states of theEuropean Union, additional requirements are specified in annex A.SIST EN 12863:2002
EN 12863:2002 (E)74.2 Intervals between periodic inspectionsA cylinder shall fall due for a periodic inspection on its first receipt by a filler after the expiry of the interval of5 years in the case of non-monolithic massed cylinders, or 10 years in the case of monolithic massed cylinders.NOTEThese intervals conform to the current RID/ADR regulations.However additional initial inspection requirements for newly massed cylinders are required as follows:a) Non-monolithic massFor all newly massed cylinders an initial inspection according to this standard shall be either before 2 years inservice or before the first fill after the 2 years have elapsed.b) Monolithic massesFor all newly massed cylinders an initial inspection according to this standard shall be either before 3 years in serviceor before the first fill after the 3 years have elapsed.After the initial inspection according to either a) or b), the normal period as stated above shall apply.Provided the cylinder has been subjected to normal conditions of use and has not been subjected to abusive orabnormal conditions rendering the cylinder unsafe, there is no general requirement for the user to return a gascylinder before the content has been used, even though the test interval may have lapsed.5 Preparation of gas cylinder5.1 Removal of gasBefore proceeding with the inspection, cylinders shall be depressurised of gas. Cylinders shall be checked forpressure both before and after depressurisation. Depressurization shall be carried out in a safe manner havingdue regard to the characteristics of acetylene. Depressurisation shall be carried out over a period long enoughto ensure a removal of all acetylene, except saturation gas (see clause 3.6). Precautions shall be takenbecause variations in temperature influence the quantity of acetylene in the form of saturation gas.NOTEThe absence of a positive pressure reading does not clearly indicate the absence of excess gas due to thepossibility of a blocked valve (see annex B).In case of any doubts regarding the efficiency of the depressurisation cycle, the cylinder shall be weighed.A cylinder weighing greater than the tare weight (see 3.7) stamped on the cylinder is not always a clearindication of the presence of excess gas. Consideration should be given to the possibility of contamination, suchas an excess of solvent or the ingress of water.A cylinder weighing less than or equal to the stamped tare weight is not always a clear indication of the absenceof gas under pressure. Consideration should be given to factors such as a possible solvent shortage or externalcorrosion causing a loss of shell weight.5.2 Preparation for external visual inspectionEach cylinder shall be cleaned and have all loose coatings, corrosion products, tar, oil or other foreign matterremoved from its external surface by a suitable method, e. g. by brushing, shot blasting (under closelycontrolled conditions to ensure that there is no leakage of acetylene into the brushing or shot blasting cabinet)water jet abrasive cleaning, chemical cleaning or other methods. Care shall be taken at all times to avoiddamaging the cylinder and pressure relief devices where fitted.NOTEThe external visual inspection, in accordance with 6.1, can be carried out at this stageSIST EN 12863:2002
EN 12863:2002 (E)85.3 Valve removalBefore removing the valve from an acetylene cylinder it shall be determined that the cylinder has beencompletely depressurised as described in 5.1. If there is any reason to believe that a valve is blocked (e.g. thelack of an audible release of gas when opening the valve) and that the cylinder may still contain residual gasunder pressure, checks shall be made e.g. by introducing an inert gas at a pressure lower than 5 bar andobserving its discharge.If it is found that the valve is obstructed, then a suitable method shall be employed to remove the gas or thevalve, taking into consideration the design of the valve and ensuring that all necessary precautions are takenhaving due regard to the hazards that can result from an uncontrolled operation (see annex B). Devalving shalltake place in the open or in a ventilated area. The temperature of the cylinder when removing the valve shouldbe close to the ambient temperature within the inspection area, so as to avoid either excess venting of residualgas or ingress of air.NOTEThe cylinders should not be left open or without valves longer than necessary for the inspection.5.4 Removal of neck/core hole filtersAcetylene cylinders usually contain neck filters/core hole packing, consisting of filter (or metallic gauze) andfelts. Neck filters and packing materials, placed between the top of the porous mass and the base of the valvestem, shall be removed, as appropriate, to enable an inspection of the porous mass in accordance with theinspection requirements of the porous mass manufacturer or the inspection body.Some porous mass manufacturers equip monolithic mass acetylene cylinders with a wooden plug, which formsan integral part of the porous mass. This plug, which is situated below the neck filter (or metallic gauze), shallbe left intact and not removed for the purpose of the visual examination, provided that the wooden plug is in theright position, permitting the measurement of the gap in accordance with the manufacturer's instructions. If on aprevious inspection the wooden plug has been tampered with or removed by mistake or is not in the rightposition this plug shall be replaced with a new one in line with the porous mass manufacturer'sapproval/specification.Special care shall always be taken when removing filters or packing material in view of the possibility of somerestrictions at the neck with residual pressure underneath, which, if suddenly released, can blow the filter outwith some of the porous substance and can cause injury.NOTEThe presence of fine carbon powder or other contaminants on the filters or packing material is indicative of aflashback having occurred.6 Inspection and maintenance6.1 Inspection procedureThe external surface of each cylinder shall be inspected for:a) dents, cuts, gouges, bulges, cracks, laminations (as defined in Table C.1) or excessive base wear;b) heat damage, torch or electric arc burns (as defined in Table C.1);c) corrosion (as defined in Table C.2);d) other defects such as illegible or unauthorised stamp markings, unauthorised additions or modifications(see Table C.1);e) integrity of all permanent attachments.Damaged valve guards, threaded neck rings and foot rings may be repaired or replaced as appropriate. Nowelding or any heat shall be directly applied to the pressure containing part of the cylinder. If welding isSIST EN 12863:2002
EN 12863:2002 (E)9performed on a non-pressure-containing part of the cylinder, due care shall be taken with regard to thepresence of acetylene and solvent.For rejection criteria, see annex C. Cylinders no longer suitable for future service shall be renderedunserviceable (as defined in clause 10).6.2 Examination of the porous mass6.2.1 GeneralFollowing 5.4, the porous mass shall be examined for the presence of visible contamination or other defectswhich could affect the suppression of an acetylene decomposition. The examination shall be performed, wherenecessary, by the appropriate use of special spark-resistant tools such as metal wire probes, rods, feeler orclearance gauges (see annex D) to check the firmness and the presence of voids or other defects in the mass.6.2.2 to 6.2.4 give the rejection criteria. Care shall be taken to ensure that the porous mass is not damaged bythe inspection tools.6.2.2 ContaminationThe porous mass shall be checked visually for contamination such as the presence of significant fine carbonpowder and water, or oil deposits or if there has been a discolouration of the porous mass. Depending on thelevel of such contamination, the competent person shall decide if the porous mass is to be rejected.6.2.3 Monolithic masses – Cracking, crumbling or cavitationThe visual inspection shall verify that the porous mass shows no signs of cracking or crumbling. Cylinders withmasses that show cracking or crumbling shall be rejected. If the cylinder is equipped with a wooden plug (see5.4) it shall be checked by applying a gentle load that the plug is firmly fixed in its position and there is no lateralmovement.The maximum gap between the top of the cylinders and the monolithic porous mass shall not exceed that in thetype approval, if specified, for that cylinder. Those gaps up to the maximum used in the type approval tests shallapply. If at a later stage, cylinders with other gap sizes pass the requirements of the flashback test as inEN 1800, and are approved, then these gap sizes may also apply.If such data is unavailable, the gap shall not exceed 5 mm. Additionally, the porous mass shall be checked toensure that there is no significant lateral movement. Cylinders with masses that show cavitation or lateralmovement shall be rejected.6.2.4 Non-monolithic masses – CompactionNon-monolithic porous masses which have been subjected to compaction, or exhibit a loss of compaction shallbe rejected, or repaired in accordance
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