SIST EN 12979:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.YJUDGQMRSysteme für mit Flüssiggas betriebene (LPG) Fahrzeuge - EinbauvorschriftenVéhicules a Gaz de Pétrole Liquéfiés (GPL) - Exigences d'installationAutomotive LPG-systems - Installation requirements43.060.40Sistemi za gorivoFuel systemsICS:Ta slovenski standard je istoveten z:EN 12979:2002SIST EN 12979:2002en01-november-2002SIST EN 12979:2002SLOVENSKI
STANDARD



SIST EN 12979:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12979January 2002ICS 43.060.40English versionAutomotive LPG-systems - Installation requirementsVéhicules à Gaz de Pétrole Liquéfiés (GPL) - Exigencesd'installationSysteme für mit Flüssiggas betriebene (LPG) Fahrzeuge -EinbauvorschriftenThis European Standard was approved by CEN on 16 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 12979:2002 ESIST EN 12979:2002



EN 12979:2002 (E)2ContentspageForeword.3Introduction.41Scope.42Normative references.43Terms and definitions.44Symbols and abbreviated terms.75Installation requirements.75.1General requirements.75.2Connections to LPG-system.75.3LPG identification mark for M2 and M3 category vehicles.85.4Changes to the vehicle structure.85.5Container installation.85.6Installation of more than one container.95.7Components on or in the container.95.7.1General requirements.95.7.2Remote-controlled service valve with excess flow valve on the container.95.7.3Pressure relief valve.95.7.4Filling unit.95.7.580 % stop valve.95.7.6Level indicator.105.7.7Gas-tight housing.105.8Gas pipes and hoses.105.9Gas connections between components of the LPG-system.105.10Remote-controlled shut-off valve.115.11Vehicle connector.115.12Electrical installation.115.13Fuel selection system.125.14Pressure relief device.125.15Installation manual.125.15.1General.125.15.2Contents of the installation manual.126Markings in case of retrofit installation.13Annex A (informative)
Definitions of vehicle categories (extract from Directive 70/156).14A.1International classification of vehicle categories.14A.2Load and checking conditions.16Annex B (normative)
Container fixing requirements up to a capacity of 150 litres.19B.1General requirements.19B.2Container frame.20Annex C (normative)
Arrangement of approval markings.21C.1Type approval marking.21C.2International country numbers.22Annex D (normative)
Provisions regarding the identification for M2 and M3 category vehicles.23Annex E (normative)
Provisions regarding the identification of the service coupling.24Annex F (informative)
Installation of more than one container.25Bibliography.26SIST EN 12979:2002



EN 12979:2002 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 286 "Liquefied Petroleum Gasequipment and Accessories", 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 July 2002, and conflicting national standards shall be withdrawn at the latest byJuly 2002.Annexes A and F are informative.Annexes B, C, D and E 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, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.SIST EN 12979:2002



EN 12979:2002 (E)4IntroductionThis European Standard specifies requirements for the installation of equipment for the use of Liquefied PetroleumGas (LPG) in automotive propulsion systems.This European Standard calls for the use of substances and procedures that can 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 execution of its provisions is entrusted toappropriately qualified and experienced people.1 ScopeThis European Standard specifies the requirements for the installation of automotive LPG components that complywith prEN 12805 and prEN 12806.These requirements are to ensure safe operation of such components.This standard does not cover type approval of a LPG motor vehicle.NOTEType approval requirements are covered in UN/ECE Regulations and EU legislation.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 589,Automotive fuels - LPG - Requirements and test methods.ISO 630, Structural steels - Plates, wide flats, bars, sections and profiles.ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws andstuds.prEN 12805, Automotive liquefied petroleum gas components - Tanks.prEN 12806, Automotive liquefied petroleum gas components - Other than tanks.EN 60529, Degrees of protection provided by enclosures (IP-code) (IEC 60529:1989).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1test pressurepressure to which the component or an assembly of components is subjected during the test procedureSIST EN 12979:2002



EN 12979:2002 (E)53.2working pressurepressure under normal operating conditions3.3Liquefied Petroleum Gas (LPG)mixture of light hydrocarbons, gaseous under normal atmospheric conditions which can be liquefied by increasedpressure or decreased temperature, the main components are propane, propene, butane and butene isomers3.4automotive LPGmotor fuel according to EN 5893.5containervessel used for the storage of automotive LPG3.680 % stop valvedevice that limits the filling of the container to 80 % of the water capacityNOTEthe 80% stop valve can be combined with the filling unit.3.7level indicatordevice that shows the level of liquid in the container3.8pressure relief valvedevice that limits the pressure build up in the container3.9remote-controlled service valvedevice that allows or interrupts the LPG supply to the vaporizer/pressure regulator3.10excess flow valvedevice that interrupts the flow of LPG in case of a complete pipe fracture or hose rupture3.11gas-tight housingcover that protects the components fitted to the container and vents any leak to the venting tube3.12power supply bushinggas-tight electrical power conductor3.13non-return valvedevice that allows flow in one direction only3.14pressure relief device (i.e. fusible plug)component protecting the container from bursting by venting the LPG content at a pre-set temperature3.15filling unitdevice that allows the container to be filled with LPG and prevents flow in the reverse directionNOTEThe filling unit can be combined with the 80 % stop valve.SIST EN 12979:2002



EN 12979:2002 (E)63.16venting tubeduct that connects the gas-tight housing to the atmosphere by way of a flanged fitting (lead through) fitted to thechassis of the vehicle3.17electronic control unitdevice that controls the electrical power supply to the remote-controlled service valves3.18fuel railpipe or flexible hose that supplies the fuel to the injection devices3.19vehicle connectordevice located at the outside of the vehicle used to refuel the vehicleNOTEThe vehicle connector can be combined with the filling unit and/or the 80% stop valve when the container is notinstalled inside the vehicle3.20vehicle typevehicle or family of vehicles which have the following characteristics in common: the manufacturers type designation; the essential aspects of design and construction; chassis/floor-pan; installation of the LPG equipment.3.21type of automotive LPG-systemLPG-system or family of LPG-systems which have the following characteristics in common: automotive LPG-system manufacturer; pressure regulator/vaporiser type and manufacturer; gas fuelling system type and manufacturer, i.e. induction mixer, injector device, vapour or liquid, single ormultipoint injection system: sensors; container type and manufacturer; container accessories type and manufacturer; container frame; ECU (Electronic Control Unit) type by the same manufacturer; basic software as far as safety issues are concerned; installation manual; user manual.SIST EN 12979:2002



EN 12979:2002 (E)74 Symbols and abbreviated termsEMCElectro-Magnetic Compatibilitygacceleration due to gravityPRVPressure Relief ValvePRDPressure Relief Device5 Installation requirements5.1 General requirementsThe installer of the LPG-system shall ensure that: he possesses the expertise necessary for the proper installation of the LPG-system, he has a quality control system that ensures that the installation of the LPG-system meets the requirements ofthis standard, he maintains records of the leak test and start up operations that are carried out after the installation, the LPG-system installed in the vehicle shall function in such a manner that the pressure for which it has beendesigned and approved cannot be exceeded, all components of the automotive LPG-system comply with prEN 12805 and prEN 12806 - additionalequipment required for the effective operation of the engine , not covered by prEN 12805 and prEN 12806 areinstalled only in parts of the LPG-system where the pressure is less than 20 kPa, all parts of the system are securely fastened, the LPG-system has been tested and corrected for leaks, the LPG-system is installed so that it is adequately protected against damage due to moving vehiclecomponents, collision, grit or to the loading or unloading of the vehicle or the shifting of those loads, all components are installed so that it is possible to inspect them and the relevant markings can be read.Excluding the container, no component of the LPG-system, including any protective material which form part ofsuch components, shall project beyond the external surface of the vehicle, with the exception of the vehicleconnector if this does not project more than 10 mm beyond the nominal line of the body panel. No componentof the LPG-system, including its protective material if applicable, excluding the container, shall be installedbelow the lower edge of the vehicle. No component of the LPG-system shall be located within 100 mm of theexhaust or similar heat source, unless adequate shielding against heat is provided, the installation of the automotive LPG-system complies with the relevant electro-magnetic compatibility (EMC)requirements.In case of a retrofit installation of the LPG-system, the manufacturer of the system shall supply installationinstructions to the installer of the LPG-system.5.2 Connections to LPG-systemNo appliances shall be connected to the propulsion system other than those strictly required for the properoperation of the engine of the motor vehicle.SIST EN 12979:2002



EN 12979:2002 (E)8Motor vehicles of categories M2, M3, N2, N3 and M1 (see annex A) having a maximum total mass of more than 3 500kg fitted with a compartment heating system which is connected to the LPG-system shall be adequately protectedagainst unintended gas escape and the operation of the LPG propulsion system shall not be affected.Cooking appliances connected to the vapour phase of the container shall be adequately protected againstunintended gas escape and the operation of the LPG propulsion system shall not be affected.Heating and/or cooking system shall not be connected to the liquid phase of the container. The vapour take-offsystem shall be protected by a manual or remotely controlled shut-off valve incorporating an excess flow, fitted tothe container.If a mono fuel vehicle with a petrol limp home system is equipped with a service coupling in the LPG-system thenthis coupling shall be adequately protected by the installation of a non-return valve between the container and theservice coupling and it shall be possible to only operate the engine via this coupling. Vehicles provided with aservice coupling shall have a sign in the form of a sticker in accordance with annex E, near the service coupling.5.3 LPG identification mark for M2 and M3 category vehiclesCategory M2 and M3 vehicles shall be identified in accordance with annex D.A sign in form of a sticker shall be attached to the front and rear of M2 and M3 category vehicles and on the outsideof the doors on the left-hand side for the right hand drive vehicles and on the right-hand side for left hand drivevehicles.5.4 Changes to the vehicle structureIf any change is made to the vehicle structure to facilitate the installation of the LPG-system, or if the container isfitted on the roof of the motor vehicle, then a written agreement, accompanied by a detailed drawing, shall beobtained from the manufacturer of the motor vehicle or his authorised representative.5.5 Container installationThe container shall: not be installed in the engine compartment, be securely fastened to the motor vehicle, be installed in the correct position according to the container manufacturer instructions.The container shall have permanent fixing points to secure it to the motor vehicle or the container shall be securedto the motor vehicle by a container frame and container straps. The container shall be installed so that there is nometal to metal contact, other than at permanent fixing points fitted by the container manufacturer.When the vehicle is fully laden the container shall not be less than 200 mm above the road surface, unless thecontainer is adequately protected at the front and the sides and no part of the container is located lower than thisprotective structure.The container shall not be lower than the original load-bearing points of the vehicle which are part of the vehiclestructure; the original ramp angles and ground clearance shall not be affected, see annex A.The container shall be installed so that the following accelerations can be absorbed (without damage occurring)when the container is full: vehicles of categories M1 and N1: 20 g in the direction of travel and 8 g horizontally at right angle to thedirection of travel; vehicles of the categories M2 and N2: 10 g in the direction of travel and 5 g horizontally at right angle to thedirection of travel;SIST EN 12979:2002



EN 12979:2002 (E)9 vehicles of the categories M3 and N3: 6,6 g in the direction of travel and 5 g horizontally at right angle to thedirection of travel.These conditions are met if the requirements of annex B are fulfilled.The adequacy of the absorption of accelerations can be shown by practical testing or calculation if its equivalencecan be demonstrated.5.6 Installation of more than one containerIf more than one container is connected to the fuel line to the engine, the containers shall be installed so that nohydrostatic pressure build-up can take place in the fuel line and the LPG can not flow from one container intoanother.This can be achieved by installing a non-return valve downstream of the remote-controlled service valve on eachcontainer and a hydrostatic relief valve in the delivery tube, downstream of the non-return valves. An adequate filtersystem shall be placed upstream of the non-return valves to prevent fouling of the non-return valves. See FigureF.1.NOTEA non-return valve and a hydrostatic relief valve is not required if the back-flow pressure of the remote-controlledservice valve in the closed position exceeds 500
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