EN 12807:2001
(Main)Transportable refillable brazed steel cylinders for liquefied petroleum gas (LPG) - Design and construction
Transportable refillable brazed steel cylinders for liquefied petroleum gas (LPG) - Design and construction
This European Standard specifies minimum requirements concerning material, design, construction and workmanship, procedure and test at manufacture of transportable refillable brazed steel liquefied petroleum gas (LPG) cylinders of water capacity from 0,5 l up to and including 15 l. The limit of 15 l is related to manufacturing process available.
Ortsbewegliche, wiederbefüllbare, hartgelötete Flaschen aus Stahl für Flüssiggas (LPG) - Konstruktion und Aufbau
Die vorliegende Europäische Norm legt Mindestanforderungen an Werkstoffe, Konstruktion und fachgerechte Ausführungsweise, Herstellungsverfahren und Prüfung ortsbeweglicher, wiederbefüllbarer, hartgelöteter Flüssiggasflaschen (LPG) aus Stahl mit einem Fassungsraum von 0,5 l bis einschließlich 15 l fest, wenn diese der Umgebungstemperatur ausgesetzt werden.
Bouteilles rechargeables et transportables en acier brasé pour gaz de pétrole liquéfiés - Conception et construction
La présente norme européenne définit les prescriptions minimales concernant certains aspects relatifs aux matériaux, à la conception, à la construction et à l'exécution, au mode de fabrication et aux essais lors de la fabrication des bouteilles à gaz de pétrole liquéfié rechargeables et transportables, en acier brasé, d'une capacité en eau comprise entre 0,5 l et 15 l inclus, exposéesà des températures ambiantes.
Premične, ponovno polnljive trdo spajkane jeklenke iz jekla za utekočinjeni naftni plin (UNP) - Konstrukcija in izdelava
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ortsbewegliche, wiederbefüllbare, hartgelötete Flaschen aus Stahl für Flüssiggas (LPG) - Konstruktion und AufbauBouteilles rechargeables et transportables en acier brasé pour gaz de pétrole liquéfiés - Conception et constructionTransportable refillable brazed steel cylinders for liquefied petroleum gas (LPG) - Design and construction23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 12807:2001SIST EN 12807:2002en01-maj-2002SIST EN 12807:2002SLOVENSKI
STANDARD
SIST EN 12807:2002
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12807April 2001ICS 23.020.30English versionTransportable refillable brazed steel cylinders for liquefiedpetroleum gas (LPG) - Design and constructionBouteilles transportables et rechargeables en acier brasépour gaz de pétrole liquéfiés (GPL) - Conception etfabricationOrtsbewegliche, wiederbefüllbare, hartgelötete Flaschenaus Stahl für Flüssiggas (LPG) - Konstruktion undHerstellungThis European Standard was approved by CEN on 5 March 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, 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© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12807:2001 ESIST EN 12807:2002
Page 2EN 12807:2001ContentspageForeword.4Introduction.51Scope.52Normative references.53Terms and definitions and symbols.53.1Terms and definitions.53.2Symbols.64Materials.65Design.75.1General requirements.75.2Calculation of cylinder shell thickness.75.3Design of ends concave to pressure.75.3.1Design of ends concave to pressure.75.4Ends of other shapes.85.5Minimum wall thickness.85.6Design of openings.96Construction and workmanship.96.1Brazing qualification.96.2Pressure retaining parts.96.3Brazed joints.96.4Tolerances.106.4.1Out of roundness.106.4.2Straightness.106.4.3Verticality.106.5Non pressure containing attachments.106.6Valve protection.106.7Protection of openings.106.8Heat treatment.106.9Protective coating.117Testing and examination.117.1Mechanical testing.117.1.1General requirements.117.1.2Types of test and evaluation of test results.117.2Burst test under hydraulic pressure.127.2.1Test conditions.127.2.2Interpretation of test.127.2.3Minimum test requirements.137.3Pressure test.137.4Ultrasonic and macro examination.137.4.1General.137.4.2Macro examination.147.4.3Examination of bung brazing.147.4.4Examination of non pressure containing attachments.147.5Visual examination of the joint.147.6Fatigue test.148Acceptance procedure.158.1General.158.2Batch testing.158.2.1Batch.158.2.2Inspection lots.158.2.3Rate of sampling.15SIST EN 12807:2002
Page 3EN 12807:20018.3Failure to meet batch test requirements.169Technical requirements for type approval.1610Marking.1711Certificate.17Annex A (normative)
Manufacturers marking.25SIST EN 12807:2002
Page 4EN 12807:2001ForewordThis European Standard has been prepared by Technical Committee CEN /TC 286, "LPG equipment andaccessories", the secretariat of which is held by NSAI.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by October 2001, and conflicting national standards shall be withdrawn at the latestby October 2001.This European Standard has been prepared under a mandate given to CEN by the European Commission and theFree Trade Association, and supports the objectives of the framework Directives on Transport of DangerousGoods.The standard has been submitted for reference into the RID and/or in the technical annexes of the ADR.Therefore in this context the standards listed in the normative references and covering basic requirements of theRID/ADR not addressed within the present standard are normative only when the standards themselves arereferred to in the RID and/or in the technical annexes of the ADR.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this document: Austria, Belgium, the Czech Republic, Denmark, Finland, France,Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlandand the United Kingdom.SIST EN 12807:2002
Page 5EN 12807:2001IntroductionThis European Standard calls for the use of substances and procedures that may be injurious to health if adequateprecautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligationsrelating to health and safety at any stage.It has been assumed in the drafting of this European Standard that the execution of its provisions is entrusted toappropriately qualified and experienced people.1 ScopeThis European Standard specifies minimum requirements concerning material, design, construction andworkmanship, procedure and test at manufacture of transportable refillable brazed steel liquefied petroleum gas(LPG) cylinders of water capacity from 0,5 l up to and including 15 l. The limit of 15 l is related to manufacturingprocess available.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. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 962, Transportable gas cylinders – Valve protection caps and valve guards for industrial and medical gascylinders – Design, construction and testsEN 1044, Brazing - Filler metalsEN 10002-1:1990, Metallic materials - Tensile testing - Part 1: Method of testEN 10120, Steel sheet and strip for welded gas cylindersEN 10204, Metallic products – Types of inspection documentsEN 12797, Brazing – Destructive tests of brazed jointsEN 12799:2000, Brazing – Non-destructive examination of brazed jointsEN 13133, Brazing – Brazer approvalEN 13134, Brazing – Procedure approvalprEN 13152, Specification and testing for liquefied petroleum gas (LPG) – Cylinder valves self-closingprEN 13153, Specification and testing for liquefied petroleum gas (LPG) – Cylinder valves-manually operated3 Terms and definitions and symbols3.1 Terms and definitionsFor the purposes of this standard the following terms and definitions apply:SIST EN 12807:2002
Page 6EN 12807:20013.1.1yield stressthe upper yield strength, ReH or, for steels that do not exhibit a defined yield, the 0,2% proof stress (non-proportional elongation, see EN 10002-1)3.1.2normalisingheat treatment in which a finished cylinder is heated to a uniform temperature above the upper critical point (Ac3) ofthe steel and
then to the melting point of the brazing filler metal, followed by cooling in a controlled atmosphere3.2 SymbolsaCalculated minimum thickness of the cylindrical shell.millimetresAPercentage elongation after fracture.%bCalculated minimum
thickness of the end of the cylindermillimetresCShape factor (see table 1, figure 2 and 3)DOutside diameter of the cylinder as given in the design drawing (see figure 1)millimetresDpDiameter of the bend test mandrelmillimetreshHeight of the cylindrical part of the end (see figure 1)millimetresHOutside height of the domed part of the end (see figure 1)millimetresLLength of the cylinder.millimetresLoOriginal gauge length of the test piece, in accordance with EN 10002-1millimetresnRatio : diameter of the bend test mandrel to the thickness of jointPcCalculation pressure, used to calculate the minimum required thickness of thecylindrical shell and ends.bar (1 bar = 105Pa = 105
N/m2)PbMaximum pressure, attained during the burst test.barPtActual test pressure above atmospheric pressure applied to the cylinder by themanufacturerbarrInside knuckle radius of the end.millimetresRInside dishing radius of the end.millimetresReHUpper yield strengthN/mm2RgMinimum value of tensile strengthN/mm2RoMinimum value of yield stressN/mm2RmActual value of tensile strength determined by the tensile test specified in 7.1.2.2.N/mm2tThickness of the test specimen at the jointmillimetres4 Materials4.1Materials for shells and end pressings shall conform to EN 10120 with respect to the main elements ofcomposition, and shall also meet the following additional requirement:SIST EN 12807:2002
Page 7EN 12807:2001Materials shall be suitable for a brazing temperature of 1 100 °C for the duration of the brazing operation, withoutsignificant grain growth.The term "materials" refer to materials in the state before any specific transformation which results from themanufacturing process.4.2All parts brazed to the cylinder shall be made of brazable, compatible material.4.3The brazing consumables (see EN 1044) in the form of wire or paste shall be such that they are capable ofgiving consistent joints with minimum tensile strength at least equal to that specified for the parent materials in thefinished cylinder.4.4The cylinder manufacturer shall have certificates according to EN 10204 type 3.1 B. These certificates shallcover the ladle analysis and mechanical properties of the steel supplied for the construction of the pressureretaining parts of the cylinder.4.5Manufacturers shall maintain a system of identification for materials used in the construction so thatmaterials for pressure retaining parts in the completed cylinder can be traced to their origin.5 Design5.1 General requirements5.1.1The calculation of the wall thickness of the pressure retaining parts to resist the internal pressure in thecylinders shall be related to the yield stress of the material.5.1.2For calculation purposes, the value of the yield stress Ro shall be limited to 0,9ReH < Ro < 0,85Rg.5.1.3The internal calculation pressure Pc for the wall thickness of cylinders shall be equal to the actual testpressure Pt.5.1.4A fully dimensioned drawing including material specifications shall be produced.5.1.5The value of Rg and Ro shall be guaranteed by the cylinder manufacturer for the finished cylinder.5.2 Calculation of cylinder shell thicknessThe minimum wall thickness of the cylindrical shell shall be :coc PRDPa15(1)In no case shall the actual thickness be less than that specified in 5.5.5.3 Design of ends concave to pressure5.3.1 Design of ends concave to pressureEnd shapes of cylinders shall fulfil the following conditions : for torispherical ends R < D ; r
>
0,1 D ; h
>
4b;brDbRDbRbRH222
(see figure 1a)(2) for semi-ellipsoidal ends H > 0,192 D ; h
>
4b
(see figure 1b).5.3.2The minimum wall thickness of the ends of cylinders shall be:SIST EN 12807:2002
Page 8EN 12807:2001cocP R15C
D
Pb(3)The value of C shall be obtained from table 1 or the graphs given in figures 2 and 3.Table 1 — Relationship between H/D and shape factor CH/DCH/DC0,251,0000,380,6120,260,9310,390,6040,270,8850,400,5960,280,8450,410,5880,290,8090,420,5810,300,7750,430,5760,310,7430,440,5720,320,7130,450,5700,330,6870,460,5680,340,6670,470,5660,350,6490,480,5650,360,6330,490,5640,370,6210,500,564NOTEIntermediate values may be obtained by linear interpolation.5.4 Ends of other shapes5.4.1Ends of shapes other than those covered by 5.3 may be used provided that the adequacy of their design isdemonstrated by a fatigue test in accordance with 7.6 or by appropriate stress analysis acceptable to the inspectionbody.5.5 Minimum wall thickness5.5.1The minimum wall thickness of the cylindrical shell, a and of the end, b, shall not be less than the valuederived from any of the following formulae:for D <
100 mm:amin = bmin = 1,1 mm(4)for 100 <
D
<
150 mm:amin =
bmin = 1,1 + 0,008 x (D-100) mm (5)for D > 150 mm:amin =
bmin
= 0,7250 D mm(6)SIST EN 12807:2002
Page 9EN 12807:2001With an absolute minimum of 1,5 mm.5.5.2If the cylindrical portion of the cylinder, measured between the beginning of the domed parts of the twoends, is not more than bD2 the wall thickness shall be in accordance with 5.3.2.5.6 Design of openings5.6.1The location of openings shall be restricted to one end of the cylinder.5.6.2Each opening in the cylinder shall be reinforced, either by a valve boss or pad, securely attached bybrazing and so designed as to be of adequate strength and to result in no harmful stress concentrations.
This shallbe confirmed by design calculations acceptable to the inspection body or a fatigue test in accordance with 7.6.5.6.3The brazing of the openings shall be clear of circumferential joints.5.6.4If the leak-tightness between the valve and the cylinder is assured by a metallic seal (e.g. copper), asuitable internal valve boss may be fitted to the cylinder by a method which need not independently guaranteeleak-tightness between the boss and the cylinder.5.6.5Tolerance in positioning of openings shall be specified by the manufacturer in the design drawing.6 Construction and workmanship6.1 Brazing qualification6.1.1The manufacturer shall have the technical capability and have at his disposal all appropriate means, andproperly qualified personnel necessary to satisfactorily carry out the manufacture of cylinders.6.1.2Each manufacturer, with the agreement of the inspection body, shall, before proceeding with the productionof a given design of cylinder,
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