EN 13175:2003
(Main)Specification and testing for Liquefied Petroleum Gas (LPG) tank valves and fittings
Specification and testing for Liquefied Petroleum Gas (LPG) tank valves and fittings
This European Standard specifies requirements for valves, including appropriate fittings for LPG service, which are connected to mobile or static pressure vessels above 150 l water capacity and may be subjected to tank design pressure. This European Standard describes valves and fittings designed for specific purposes (where required) for example filling, vapour equalising, purging, etc. These may be achieved by the use of other valves or systems that provide an equal level of safety, especially in the case of large storage tanks.
Spezifikation und Prüfung für Armaturen und Ausrüstungsteile von Flüssiggasbehältern
Diese Europäische Norm legt Anforderungen an Armaturen und zugehörige Ausrüstungsteile für den Betrieb mit Flüssiggas, die an ortsbeweglichen oder ortsfesten Flüssiggas-Druckbehältern mit einem Fassungsvermögen von mehr als 150 l angeschlossen, und bis zum Konstruktionsdruck des Behälters beansprucht werden können. Die vorliegende Europäische Norm beschreibt Armaturen und Ausrüstungsteile, die (wo gefordert) für bestimmte Einsatzbereiche vorgesehen sind, z.B. zum Füllen, für die Gaspendelung, zum Reinigen usw.
Spécifications et essais des équipements et accessoires des réservoirs pour gaz de pétrole liquéfié (GPL)
La présente norme européenne définit les exigences pour les équipements spécialisés pour le GPL qui sont raccordés à des réservoirs fixes ou mobiles dont la capacité en eau est supérieure à 150 l, et qui peuvent être soumis à la pression de calcul des réservoirs. La présente norme européenne décrit les équipements et les accessoires conçus pour des opérations spécifiques (le cas échéant), par exemple le remplissage, l'équilibrage gazeux, la vidange, etc.
Specifikacija in preskušanje ventilov in fitingov za rezervoarje za utekočinjeni naftni plin (UNP)
General Information
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Spezifikation und Prüfung für Armaturen und Ausrüstungsteile von FlüssiggasbehälternSpécifications et essais des équipements et accessoires des réservoirs pour gaz de pétrole liquéfié (GPL)Specification and testing for Liquefied Petroleum Gas (LPG) tank valves and fittings75.180.01Oprema za industrijo nafte in zemeljskega plina na splošnoEquipment for petroleum and natural gas industries in general23.060.01Ventili na splošnoValves in general23.020.10UH]HUYRDUMLStationary containers and tanksICS:Ta slovenski standard je istoveten z:EN 13175:2003SIST EN 13175:2003en01-december-2003SIST EN 13175:2003SLOVENSKI
STANDARD
SIST EN 13175:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13175April 2003ICS 23.060.01English versionSpecification and testing for Liquefied Petroleum Gas (LPG)tank valves and fittingsSpécifications et essais des équipements et accessoiresdes réservoirs pour gaz de pétrole liquéfié (GPL)Spezifikation und Prüfung für Armaturen undAusrüstungsteile von FlüssiggasbehälternThis European Standard was approved by CEN on 12 December 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,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13175:2003 ESIST EN 13175:2003
EN 13175:2003 (E)2ContentspageForeword.41Scope.42Normative references.43Terms and definitions.64Operating conditions.75Materials.85.1General.85.2Metallic materials.85.3Non-metallic components.85.4Lubricants, sealants, and adhesives.96Design – general requirements.96.1General.96.2Seats and seals.96.3Springs.96.4Threads.106.5Flanges.107Design - specific requirements.107.1Excess flow valve.107.2Non-return valve.107.3Shut-off valves.107.4Filler valve.107.5Occasional liquid withdrawal valve.117.6Internal valve.117.7Vapour equalising valve.127.8Multipurpose valve.127.9Breakaway coupling.127.10Pressure gauge.127.11Temperature gauge.127.12Plugs and caps.128Testing of the design.128.1General.128.2Over torquing deformation test.148.3External leakage test.148.4Seat leakage test.158.5Residual flow test.158.6Endurance test.168.7Pressure strength test.168.8Excess flow test.168.8.1General.168.8.2Excess flow test with air.178.8.3Excess flow test with water.178.8.4Excess flow strength test.188.9Weak section strength test.188.10Stress cracking test.188.10.1General.188.10.2Mercurous nitrate immersion test.188.10.3Moist ammonia air stress cracking test.188.11Vacuum test.18SIST EN 13175:2003
EN 13175:2003 (E)38.12Flow resistance test.188.13Test report.189Production testing.1910Marking.1911Documentation.19Annex A (normative)
ACME connections.20Annex B (normative)
Special low temperature requirements for valves.21Annex C (normative)
Production testing and inspection.22Annex ZA (informative)
Clauses of this European Standard addressing essential requirements orother provisions of EU Directives.24Bibliography.25SIST EN 13175:2003
EN 13175:2003 (E)4ForewordThis document (EN 13175:2003) has been prepared by CEN/TC 286 "Liquefied Petroleum Gas 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 2003, and conflicting national standards shall be withdrawn at the latestby October 2003.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s) and the objectives of theframework Directives on Transport of Dangerous Goods.The standard has been submitted for reference into the RID and/or in the technical annexes of the ADR.Therefore the standards listed in the normative references and covering basic requirements of the RID/ADR notaddressed within the present standard are normative only when the standards themselves are referred to the in theRID and/or in the technical annexes of the ADR.For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.Annexes A, B and C are 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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.1 ScopeThis European Standard specifies minimum requirements for the design and testing of valves, including appropriatefittings, which are connected to mobile or static LPG tanks above 150 litre water capacity. Pressure relief valvesand their ancillary equipment, contents gauges and automotive LPG components are outside the scope of thisEuropean Standard.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 549, Rubber materials for seals and diaphragms for gas appliances and gas equipment.EN 837-1, Pressure gauges – Part 1: Bourdon tube pressure gauges - Dimensions, metrology, requirements andtesting.EN 1092–1, Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated –Part 1: Steel flanges.EN 1267, Valves – Test of flow resistance using water as test fluid.SIST EN 13175:2003
EN 13175:2003 (E)5EN 1503-1, Valves – Materials for bodies, bonnets and covers – Part 1: Steels specified in European Standards.EN 1503-2, Valves – Materials for bodies, bonnets and covers – Part 2: Steels other than those specified inEuropean Standards.EN 1503-3, Valves – Materials for bodies, bonnets and covers – Part 3: Cast Irons specified in EuropeanStandards.EN 1503-4, Valves – Materials for bodies, bonnets and covers – Part 4: Copper alloys specified in EuropeanStandards.EN 1563, Founding – Spheroidal graphite cast irons.prEN 1983, Industrial valves – Steel ball valves.EN 10270-3, Steel wire for mechanical springs – Part 3: Stainless spring steel wire.EN 12164, Copper and copper alloys – Rod for free machining purposes.prEN 12360, Industrial valves – Copper alloy globe valves.EN 12420, Copper and copper alloys – Forgings.prEN 12516-1, Industrial valves – Shell design strength – Part 1: Tabulation method for steel valves.prEN 12516-2, Industrial valves – Shell design strength – Part 2: Calculation method for steel valves.prEN 12516-3, Valves – Shell design strength – Part 3: Experimental method.prEN 13547, Industrial valves – Copper alloy ball valves.prEN 13709, Industrial valves – Steel globe and globe stop and check valves.prEN 13789, Industrial valves – Cast iron globe valves.EN 13906, Cylindrical helical springs made from round wire and bar – Calculation and design.EN 50014, Electrical apparatus for potentially explosive atmospheres – General requirements.ISO 7-1, Pipe threads where pressure-tight joints are made on the threads – Part 1: Dimensions, tolerances anddesignation.ISO 2859-1, Sampling procedures for inspection by attributes – Part 1: Sampling schemes indexed by acceptancequality limit (AQL) for lot-by-lot inspection.ISO 6957, Copper alloys – Ammonia test for stress corrosion resistance.ANSI/ASME B1.20.1 – 1983, Pipe threads, general purpose (inch) issued by American National Standards Instituteon 19983.ASME B1.5 – 1990, ACME Screw Threads issued by American Society of Mechanical Engineers on 1990.SIST EN 13175:2003
EN 13175:2003 (E)63 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1LPGmixture of light hydrocarbons, gaseous under standard atmospheric conditions, which can be liquefied by increasedpressure or decreased temperature. The main components are propane, propene, butane and butene isomers3.2self closing valvenormally closed valve that provides a leak tight seal and opens by the engagement of a special connector or byfluid passing through it.
It closes automatically upon removal of the connector or by stopping the fluid flow3.3sealing elementelement used to provide internal leak tightness3.4maximum allowable pressuremaximum pressure for which the equipment is designed3.5internal leak tightnessresistance to leakage across the valve seal or other internal sealing components when the valve is closed3.6excess flow valvevalve designed to close automatically, with a small residual flow, when the fluid flow passing through it exceeds apredetermined value, and to re-open when the pressure differential across the valve has been restored below acertain value3.7non return valvevalve designed to close automatically to restrict reverse flow3.8residual flowallowable flow past the seat of an excess flow valve or a non return valve, when the valve is in the closed position3.9shut-off valvevalve to provide a leak-tight seal which is operated either manually, remotely or is self-closing3.10filler valvevalve system for liquid fill service3.11occasional liquid withdrawal valvenormally blanked valve, used for occasional liquid withdrawal which is designed to be opened by the engagementof a special connector valve3.12internal valvevalve which has its seal within the profile of the tankSIST EN 13175:2003
EN 13175:2003 (E)73.13vapour equalising valvevalve which permits vapour to flow in either direction in order to equalise vapour pressure between tanks duringliquid transfer, and which incorporates an excess flow valve and a self closing valve opened by a special connectorvalve.3.14multipurpose valvevalve which incorporates two or more service functions and which meets the combined requirements of theindividual functions3.15breakaway couplingcoupling which separates at a predetermined section when required and each separated section contains a self-closing shut-off valve, which seals automatically3.16test pressurepressure at which the valve, fitting or component is testedNOTEAll pressures are gauge pressures unless otherwise stated.3.17plugcomponent which seals a female connection3.18capcomponent which seals a male connection3.19fittingpressure containing component fitted to an LPG pressure system3.20STPStandard Temperature and Pressure [15,6 °C (288,7 K), 1,013 bar absolute (0,1013 MPa absolute)]4 Operating conditionsValves and fittings designed in accordance with this standard shall be suitable for the following conditions:¾ a minimum operating temperature of minus 20 °C. In service, temperatures below this can be encounteredduring short periods, for example, when filling;¾ for some parts of Europe and certain applications, temperatures lower than minus 20 °C can be encountered,for these conditions
the requirements of annex B shall be met;¾ the maximum operating temperature is 65 °C. The maximum allowable pressure for valves or fittings is 25 bar;¾ the minimum pressure to which a valve or fitting is normally exposed is 0 bar. Vacuum conditions on the valve,arising from butane at low temperature or evacuation of the tank may expose the valve or fitting to a vacuum of50 mbar absolute.SIST EN 13175:2003
EN 13175:2003 (E)85 Materials5.1 General5.1.1All materials in contact with LPG shall be physically and chemically compatible with LPG under all normaloperating conditions for which the valve or fitting is intended to be used.5.1.2Materials for valve components shall be selected to give adequate strength in service. Consideration shallalso be given to other modes of failure such as atmospheric corrosion, brass dezincification, stress corrosion,impact or material failure.5.1.3Alternative materials to those listed in 5.2 are not precluded, providing they comply with a standard orspecification that ensures control of chemical and physical properties and quality appropriate to the end use.5.2 Metallic materials5.2.1Valves and fittings shall be made from steel, stainless steel, copper alloys or other suitable materials.5.2.2For pressure containing components steel and stainless steels shall comply with EN 1503-1 or EN 1503-2,cast iron shall comply with EN 1503-3 and copper alloys shall comply with EN 1503-4.Materials for steel flanges shall be in accordance with EN 1092-1.5.2.3Components made from stainless steel shall contain not less than 17 % chromium, and not less than 7 %nickel.Springs shall be manufactured from stainless steel in accordance with EN 10270-3 or material with an equivalentresistance to corrosion.5.2.4Hot stamped brass shall be non-porous and shall be suitable for machining or other process.Leaded brass shall be CW614N or CW617N in accordance with EN 12420 or EN 12164. Sand-cast brass shall notbe used.Cold drawn brass rods up to 45 mm in cross-section shall only be used after heat treatment and adequate testingfor internal cracking. Cold drawn brass rods greater than 45 mm in cross-section shall not be used.Components produced from stamping brass shall not exhibit cold shuts also known as folds, or surface defects.5.2.5Spheroidal graphite cast iron shall comply with EN 1563, with an elongation at fracture of more than 18 %.Other ductile irons or cast irons shall not be used.5.2.6Castings shall be free from inclusions and surface defects, which could adversely affect the strength, leaktightness or performance of the valve or fitting.5.3 Non-metallic componentsAll non-metallic materials in contact with LPG shall be compatible with LPG and shall not distort, harden or adhereto the body or seat face to such an extent as to impair the function of the valve. They shall also comply with theappropriate requirements of EN 549.All elastomeric materials in contact with LPG shall meet the specific requirements of EN 549 for resistance to thefollowing:¾ gas (pentane test);¾ lubricants;SIST EN 13175:2003
EN 13175:2003 (E)9¾ ageing;¾ low temperature;¾ high temperature;¾ compression;¾ ozone (where gasket/seal is exposed to atmosphere).5.4 Lubricants, sealants, and adhesivesWhen in contact with LPG, lubricants, sealants and adhesives shall be compatible with LPG, and shall not interferewith the normal operation of the valve or fitting.6 Design – general requirements6.1 General6.1.1All valves and fittings shall be capable of withstanding the tests specified in Table 1 where appropriate.6.1.2Moving parts shall have sufficient clearance to ensure freedom of movement under all normal conditions ofservice. Where necessary, means of guidance shall be provided to ensure correct seating or sealing.6.1.3All components vital to the function of a valve or fitting shall be secured to prevent disassembly duringnormal operation.6.1.4Valves and fittings shall be designed to ensure external and internal leak tightness, and its function shallnot be affected, as a result of vibration during transportation.6.1.5The design shall take account of the use of dissimilar materials, e.g. electrochemical corrosion or materialexpansion.6.1.6Electrical equipment, when used in an integral part of a valve or fitting, shall meet the requirements ofEN 50014 where appropriate.6.1.7Valves shall have their flow resistance determined using water as a test fluid6.1.8Possible stress corrosion shall be eliminated by either design or heat treatment.6.2 Seats and seals6.2.1Valves and fittings shall be so designed that they can be installed without damaging non-metallic seats orseals.6.2.2Sealing may be achieved by either elastomeric or other non-metallic material. When a metal to metalclosure is used, the residual flow shall meet the requirements of 8.5.6.2.3The sealing element ensuring internal leak tightness shall be attached or otherwise assembled such that itwill not become dislocated under service conditions. The means to secure the sealing element shall not rely solelyon adhesive.6.3 SpringsSprings shall be designed in accordance with EN 13906.SIST EN 13175:2003
EN 13175:2003 (E)106.4 Threads6.4.1Taper threaded tank connections shall comply with ANSI/ASME B1.20.1 - 1983. Thread sizes shall notexceed DN 80.6.4.2Where taper threads are used, the design shall ensure that over-torquing shall not impede the correctoperation of the valve or fitting, see 8.2.6.4.3Taper threaded sections of a body designed for a tank connection shall be constructed with wrenchingflats.6.4.4All threads other than taper threaded tank connections shall be in accordance with an European Standard(EN) or an International Standards (ISO), or shall be ACME threads in accordance with annex A or ANSI/ASMEB1.20.1 - 1983.To avoid mismatching with ANSI/ASME B1.20.1 - 1983 threads, ISO 7-1 shall not be used.6.5 FlangesFlanges shall comply with EN 1092-1.7 Design - specific requirements7.1 Excess flow valve7.1.1Excess flow valves shall be designed so that when closed the flow past the seat to allow for reduction ofdifferential pressure across the valve, shall not exceed that of an opening of 1,77 mm2 cross sectional area.7.1.2Excess flow valves shall operate at a flow-rate of not more than 10 % above, nor less than 20 % below therated closing flow capacity specified and it shall close automatically at a pressure differential across the valve of notmore than 1,4 bar.7.1.3The connection to the tank shall not affect the function of the valve or its rated flow.NOTECopper alloy excess flow valves manufactured in accordance with prEN 12328 are suitable.7.2 Non-return valveThe connection to the tank shall not affect the operation of the non-return valve.7.3 Shut-off valves7.3.1Shut off valves shall be of the ball valve or globe valve type, ball valves shall be in accordance withprEN 1983 or prEN 13547 and globe valves shall be in accordance with prEN 12360, prEN 13709 or prEN 13789.7.3.2Valves with a minimum cross section of LPG passage through the valve, greater than the equivalent crosssectional area of 3 mm diameter for liquid phase withdrawal, shall be protected by an excess flow valve.Valves with a minimum cross section of LPG passage through the valve, greater than the equivalent crosssectional area of 8 mm diameter for vapour phase withdrawal, shall be protected by an excess flow valve.7.4 Filler valve7.4.1The filler valve shall be either a:¾ manually, or remotely operated shut-off valve in combination with a non-return valve, orSIST EN 13175:2003
EN 13175:2003 (E)11¾ double non-return valve, at least one of which meets the requirements of 8.4, or¾ system that provides an equivalent level of safety.7.4.2Where supplied as an assembled unit, the filler valve shall meet the following criteria:¾ the non-return valve components shall meet the requirements of 7.2;¾ where liquid can be trapped, means shall be provided to relieve excess pressure;¾ where the body is made of two or more components, it shall not be possible to disassemble the componentswith a torque of less than 80 Nm.7.4.3The fill connection shall be provided with a leak tight cap or blind flange.
When the fill connection isprovided with a soft-seated non-return valve in combination with a shut-off valve, a leak tight cap shall not berequired. Consideration shall be given to providing dust protection.NOTE 1For typical filler valve inlet connections see annex A.NOTE 2Plugs and caps can be provided with a locking mechanism to discourage unauthorised interference.7.4.4Where the connecting seal is retained in the body of the filler valve, the seal retaining groove shall beprovided with a vent hole in order to prevent the ejection of the seal on disconnection.7.4.5A weak section e.g. break-off grooves, or shear points, shall be included such as to leave the main closureintact if it should be subjected to external damage.7.5 Occasional liquid withdrawal valve7.5.1An occasional liquid withdrawal valve shall incorporate an excess flow valve unless this is provided by thespecial connector used to open the valve.7.5.2It shall be provided with a plug or cap to provide a leak-tight seal, see 8.3.7.5.3The plug or cap shall contain a vent to indicate leak tightness before the plug or cap is fully disengaged.7.5.4The special connector shall be designed or located to ensure a sufficient engagement before activating theself-closing element.7.5.5The joint between the special connector and the occasional liquid withdrawal valve shall be designed to beleak-tight.7.6 Internal valve7.6.1The internal valve shall incorporate one of the following systems:¾ a self closing valve and an excess flow valve, when open;¾ an automatic shut-off valve, actuated by LPG pump differential pressure that will provide a leak-tight seal whenthe pump is not in operation;¾ a self closing valve opened by hydraulic, pneumatic or mechanical means.NOTEConsideration should be given to incorporating a thermally sensitive device to ensure the valve closes in the eventof fire.7.6.2A weak section e.g. break-off grooves or shear points, shall be provided to leave the main closure intact ifit should be subjected to external
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