EN 12493:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Flüssiggas­Geräte und Ausrüstungsteile - Geschweißte Druckbehälter aus Stahl für Flüssiggas (LPG) - Konstruktion und Herstellung von StraßentankfahrzeugenÉquipements pour GPL et leurs accessoires - Réservoirs en acier soudés pour gaz de pétrole liquéfié (GPL) - Conception et construction des camions-citernesLPG equipment and accessories - Welded steel tanks for liquefied petroleum gas (LPG) - Road tankers design and manufacture43.080.10Tovornjaki in priklopnikiTrucks and trailers23.020.20Posode in vsebniki, montirani na vozilaVessels and containers mounted on vehiclesICS:Ta slovenski standard je istoveten z:EN 12493:2008SIST EN 12493:2008en01-junij-2008SIST EN 12493:2008SLOVENSKI
STANDARDSIST EN 12493:20021DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12493March 2008ICS 23.020.30Supersedes EN 12493:2001
English VersionLPG equipment and accessories - Welded steel tanks forliquefied petroleum gas (LPG) - Road tankers design andmanufactureÉquipements pour GPL et leurs accessoires - Réservoirsen acier soudés pour gaz de pétrole liquéfié (GPL) -Conception et construction des camions-citernesFlüssiggas­Geräte und Ausrüstungsteile - GeschweißteDruckbehälter aus Stahl für Flüssiggas (LPG) -Konstruktion und Herstellung von StraßentankfahrzeugenThis European Standard was approved by CEN on 11 February 2008.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 CEN 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 CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12493:2008: ESIST EN 12493:2008

Guidance on selection of material grades.23 Annex B (normative)
Reference temperatures for design.24 B.1 Introduction.24 B.2 General.24 B.3 Developed pressure.24 B.4 Filling.24 Annex C (informative)
Alternative reference temperatures for design.25 C.1 Introduction.25 C.2 General.25 C.3 Developed pressure.25 C.4 Filling.25 Annex D (normative)
Design.26 D.1 Design stresses.26 D.2 Design pressure.26 D.2.1 General.26 D.2.2 Rigid single tankers and semi-trailers.26 SIST EN 12493:2008

Example of joints.41 Annex F (normative)
Allowable tolerances.45 F.1 Tanks.45 F.1.1 External diameter.45 F.1.2 Out of roundness.45 F.1.3 Deviation of straightness.45 F.1.4 Irregularities in profile.45 F.2 Dished end tolerance.46 F.2.1 Thickness of material.46 F.2.2 Profile.46 F.3 Assembly tolerances.47 F.3.1 Middle line alignment.47 F.3.2 Surface alignment.47 F.4 Attachments, nozzles and fittings.48 F.5 Overall length.48 Annex G (normative)
Heat treatment.49 G.1 Method of post-weld heat treatment.49 G.2 Temperature control.49 G.3 Temperature limit.49 G.4 Temperature measurement.49 Annex H (informative)
Typical method for measurement of shell peaking.50 H.1 Profile gauge.50 H.2 Peaking survey.50 Annex I (normative)
Welding imperfections and test specimens.53 I.1 Imperfections.53 I.2 Test specimens.56 Annex J (informative)
Choice of non-destructive test methods for welds.57 J.1 Internal imperfections.57 J.2 Surface imperfections.57 Annex K (normative)
Hydraulic pressure test.58 K.1 Temporary fittings.58 K.2 Pressure gauges.58 K.3 Pressurising agent.58 K.4 Avoidance of shock.58 K.5 Applied pressure.58 Annex L (normative)
Name plate.59 Bibliography.61
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels EN 444, Non-destructive testing — General principles for radiographic examination of metallic materials by X- and gamma-rays EN 462-1, Non-destructive testing — Image quality of radiographs — Part 1: Image quality indicators (wire type) — Determination of image quality value EN 462-2, Non-destructive testing — Image quality of radiographs — Part 2: Image quality indicators (step/hole type) — Determination of image quality value EN 473, Non destructive testing — Qualification and certification of NDT personnel — General principles EN 571-1, Non destructive testing — Penetrant testing — Part 1: General principles EN 837-2, Pressure gauges — Part 2: Selection and installation recommendations for pressure gauges SIST EN 12493:2008

EN ISO 15614-1, Specification and qualification of welding procedures for metallic materials — Welding procedure test — Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 yield strength upper yield strength ReH or, for steels that do not exhibit a definite yield (non-proportional elongation), the
0,2 % proof strength 3.2 cold forming forming at temperatures not less than 25 °C below the maximum permissible temperature for stress relieving, in accordance with the applicable material specifications 3.3 hot forming forming at temperatures above the temperature for stress relieving as stated in the material specifications 3.4 sun shield shield covering not less than the upper third but not more than the upper half of the shell surface, separated from the shell by an air gap of at least 40 mm 3.5 tank assembly of the shell (the pressure-retaining enclosure including the openings and their closures) and non pressure-retaining parts welded directly to the shell 3.6 competent authority authority designated as such in each country by its government 3.7 notified/designated body testing and certifying body approved by a competent authority 3.8 competent person person who, by qualifications, training, experience and resources, is able to make objective judgements 4 Materials 4.1 Suitability Unless otherwise specified by the design documents, the design temperature range shall be - 20 °C to + 50 °C.
The materials of construction shall be suitable for operating within the envisaged temperature range. If the tank could be subjected to more severe ambient or product temperatures, the design temperature range shall be - 40 °C to + 50 °C. SIST EN 12493:2008

All materials shall conform to 10.2.4 and the ratio of the specified yield strength (ReH) to minimum tensile strength (Rm) shall not exceed 0,85
(i.e. ReH/Rm < 0,85). The percentage elongation at fracture shall be not less than 10 000 divided by the actual tensile strength in N/mm2, and in any case shall be not less than 16 % for fine grained steels and not less than 20 % for other steels.
Where fine grain steels are used, the guaranteed yield strength, ReH shall not exceed 460 N/mm2 and the upper tensile strength, Rm, shall not exceed 725 N/mm2. 4.3 Non-pressure retaining parts Non-pressure retaining parts that are directly welded to pressure retaining parts shall be of suitable materials conforming to EN 10025-2:2004 or materials with characteristics approved by a competent authority. All materials used for non-pressure retaining parts shall be compatible with the material of pressure retaining parts, and shall conform to the impact requirements of 10.2.5.4, tested in accordance with the method specified in EN 10045-1. 4.4 Welding consumables Welding consumables shall be able to provide consistent welds with properties at least equal to those specified for the parent materials in the finished tank. 4.5 Non-metallic materials (gaskets) Non-metallic materials (gaskets) shall be compatible with both phases of LPG over the range of pressures and temperatures for which the tanker is designed (see 4.1, Annex B and Annex C). 4.6 Inspection documents for materials Pressure retaining parts and non-pressure retaining parts directly welded to the tank shall be provided with the material manufacturers’ certificates conforming to EN 10204:2004 certificate type 3.1. Other parts shall have certificates conforming to EN 10204:2004 certificate type 2.2. 5 Tank design 5.1 Design conditions Reference temperatures shall conform to Annex B. Design calculations shall be carried out in accordance with Annex D. Account shall be taken of the fatigue loading on all component parts of the tank and its attachments by conducting an assessment or through proven operating experience. 5.2 Surge plates NOTE Surge plates complying with the following requirements represent established satisfactory industry practice but may result in operational restrictions on the use of the tank under ADR, in terms of permitted degrees of filling. SIST EN 12493:2008

The designer shall assess the effect of the tank and its mountings, including the additional loadings given in 5.4. NOTE The chassis manufacturer should be notified at the tank design stage that the tank, while on the chassis, could be subjected to a hydraulic test, during which the tank can contain twice the normal weight of carrying capacity. 5.7.4 Tank mountings designed as an integral attachment to the shell shall be fitted with doubler plates as specified in 5.3.
Stitch welding shall not be used. 5.8 Internal pipework The mechanical strength of internal pipework and supports shall be sufficient to withstand the service conditions, including dynamic load. NOTE Internal pipework may be attached directly to a tank boss. Pipework shall be located so as to avoid inadvertent entry of liquid LPG from the liquid inlet line into other pipework terminating in the vapour space. 6 Openings 6.1 General For the equipping of LPG road tankers, see EN 12252. Valves and other accessories shall be protected against damage by external impact either by their positioning on the tank, when mounted on the vehicle, or by specific tank design. Provision in tank design shall be either by mounting and fitting valves and other accessories in a recess within the contour of the tank shell or end, or by use of a guard able to withstand a collision with another vehicle and the forces experienced in a tank roll-over. 6.2 Reinforcement of openings Openings shall be reinforced and designed in accordance with D.4. 6.3 Threaded connections The maximum nominal diameter of threaded connections shall be 80 mm. 6.4 Manhole Tanks over 1,5 m diameter shall be fitted with a manhole either: SIST EN 12493:2008
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