SIST EN 14208:2004

Transportable gas cylinders - Specification for welded pressure drums up to 1000 litre capacity for the transport of gases - Design and construction

This European Standard specifies the minimum requirements for the material, design, construction and workmanship, inspection and testing at manufacture of refillable welded steel pressure drums, hereafter referred to as drums, of volumes of 150 litres up to 1 000 litres for compressed and liquefied gases. Cylindrical and spherical containers are covered.

Ortsbewegliche Gasflaschen - Spezifikation für geschweißte Druckfässer mit einem Fassungsraum bis zu 1000 liter für den Transport von Gasen - Gestaltung und Konstruktion

Diese Europäische Norm legt die Mindestanforderungen an die Werkstoffe, konstruktive Gestaltung, Bauweise und Ausführung, Abnahme und Prüfung fest, die bei der Herstellung von wiederbefüllbaren, geschweißten Druckfässern aus Stahl für verdichtete und verflüssigte Gase mit Fassungsraum von 150 Liter bis einschließlich 1 000 Liter gelten. Behandelt werden zylindrische und kugelförmige Druckbehälter.

Bouteilles a gaz transportables - Spécification pour les futs soudés de capacité inférieure ou égale a 1000 litres destinés au transport des gaz - Conception et fabrication

Cette Norme européenne spécifie les exigences minimales pour les matériaux, la conception, la fabrication et la mise en �uvre, l'inspection et les essais en cours de fabrication pour les fûts à pression soudés en acier rechargeables, ci-après dénommés fûts, de capacité allant de 150 litres à 1 000 litres pour le transport des gaz comprimés et liquéfiés. Les réservoirs cylindriques et sphériques sont également couverts.

Premične plinske jeklenke - Specifikacija za varjene tlačne sode z zmogljivostjo do 1000 litrov za prevoz plinov - Oblikovanje in izdelava

General Information

• Status: Published
• Publication Date: 31-Aug-2004
• ICS: 23.020.35 - Gas cylinders
• Technical Committee: TLP - Pressure vessels
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2004
• Due Date: 01-Sep-2004
• Completion Date: 01-Sep-2004
• Directive: 94/55/EC - Transport of dangerous goods by road
• Directive: 96/49/EC - Transport of dangerous goods by rail
• Directive: 96/86/EC - Transport of dangerous goods by road (94/55/EC Dir. amendment)
• Directive: 96/87/EC - Transport of dangerous goods by rail (96/49/EC Dir. amendment)
• Mandate: M/086 - Mandate to CEN for standardization in the field of transport of dangerous goods
• Ref Project: EN 14208:2004 - Transportable gas cylinders - Specification for welded pressure drums up to 1000 litre capacity for the transport of gases - Design and construction

Overview - EN 14208:2004 (Transportable gas cylinders, welded pressure drums)

EN 14208:2004 is the CEN European Standard that specifies minimum requirements for the design, construction, manufacture, inspection and testing of refillable welded steel pressure drums (transportable gas cylinders) with volumes from 150 litres up to 1 000 litres. It covers cylindrical and spherical welded pressure drums intended for the transport of compressed and liquefied gases and is intended to support conformity with transport regulations (RID/ADR).

Key topics and technical requirements

• Scope and applicability: Refillable welded steel drums for transport of gases, 150–1000 L capacity; both cylindrical and spherical geometries.
• Materials and compatibility: Requires use of steels conforming to EN 10028 parts or relevant stainless steel standards (EN 10028‑7 / EN 10088 series). Gas compatibility (corrosion, embrittlement) is addressed via EN ISO 11114‑1/2.
• Design rules: Specifies allowable design stress (design stresses fc, fe, fp, fs shall not exceed 0.77 · Y, where Y is the material yield parameter) and provides calculation methods for minimum wall thickness for cylindrical shells, spherical shells and dished ends.
• Welding and fabrication: Requirements for welding procedures, welders’ approval and weld consumables; weld quality classes referenced to EN ISO 5817 and related welding procedure standards (EN ISO 15607, EN 288‑3, EN 287‑1).
• Heat treatment and traceability: When required, full heat treatment or stress-relieving procedures, continuous recording of heat-treatment parameters, and material certification/traceability back to steel casts.
• Inspection and testing: Mandatory NDT (visual, radiographic EN 1435, ultrasonic EN 1714), destructive tests where required, pressure testing, new design burst and cyclical pressure tests, batch testing and acceptance criteria (Annex A normative).
• Marking and records: Requirements for marking, documentation and production records to support conformity assessment and regulatory compliance.

Practical applications and users

Who uses EN 14208:2004:

• Pressure vessel and cylinder design engineers-for sizing and material selection.
• Manufacturers of transportable welded gas drums-to meet production, welding and testing requirements.
• Quality/inspection personnel-for NDT procedures, batch testing and conformity records.
• Regulatory bodies and conformity assessors-for ADR/RID referencing and transport certification.
• Gas distributors, logistics providers and industrial end-users specifying compliant transportable gas cylinders.

Practical uses:

• Designing and certifying welded steel drums for compressed or liquefied gas transport.
• Establishing welding procedure qualifications, material procurement and inspection regimes.
• Demonstrating compliance with transport regulations and meeting manufacturer quality control.

Related standards (selected)

• EN 10028 (steels for pressure purposes)
• EN 10088 (stainless steels)
• EN ISO 11114‑1 / EN ISO 11114‑2 (material compatibility with gases)
• EN ISO 5817 (weld imperfections)
• EN 1435 (radiographic examination), EN 1714 (ultrasonic examination)
• EN ISO 15607, EN 287‑1, EN 288‑3 (welding procedure and welder approval)

Keywords: EN 14208:2004, transportable gas cylinders, welded pressure drums, design and construction, pressure vessel standards, gas cylinder manufacturing, ADR/RID compliance.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Ortsbewegliche Gasflaschen - Spezifikation für geschweißte Druckfässer mit einem Fassungsraum bis zu 1000 liter für den Transport von Gasen - Gestaltung und KonstruktionBouteilles a gaz transportables - Spécification pour les futs soudés de capacité inférieure ou égale a 1000 litres destinés au transport des gaz - Conception et fabricationTransportable gas cylinders - Specification for welded pressure drums up to 1000 litre capacity for the transport of gases - Design and construction23.020.30MHNOHQNHPressure vessels, gas cylindersICS:Ta slovenski standard je istoveten z:EN 14208:2004SIST EN 14208:2004en01-september-2004SIST EN 14208:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14208February 2004ICS 23.020.30English versionTransportable gas cylinders - Specification for welded pressuredrums up to 1000 litre capacity for the transport of gases -Design and constructionBouteilles à gaz transportables - Spécification pour les fûtssoudés de capacité inférieure ou égale à 1000 litresdestinés au transport des gaz - Conception et fabricationOrtsbewegliche Gasflaschen - Spezifikation fürgeschweißte Druckfässer mit einem Fassungsraum bis zu1000 liter für den Transport von Gasen - Gestaltung undKonstruktionThis European Standard was approved by CEN on 4 December 2003.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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14208:2004 ESIST EN 14208:2004

Examples of design test and batch test certificates.31Annex C (informative)
Guidance on the application of conformity assessment modules when usingthis standard.37Bibliography.42SIST EN 14208:2004

1)1 bar = 105 Pa = 0,1 MPa = 0,1 N/mm2SIST EN 14208:2004

or D02 / 4R0, or (D0r0/2)0,5.NOTEThe external height of the domed end for a torispherical end may be calculated as H0 = R0 – {(R0-D0/2)(R0+D0/2 –2 r0)}0,5SIST EN 14208:2004

Thereshall also be a facility within the dome to allow venting of any gas within, in case of leakage.5.4.5.3Where the gas carried is not toxic, the local protection may take the form of a fixed steel cage mountedlocal to the fittings. The cage shall allow access to the valves and fittings. In the case of a container that isdesigned to remain vertical, additional protection is not required where the clearance between the fittings and theedge of the shroud or frame is at least 100 mm.5.4.5.4Blank plugs, fusible plugs and pressure relief valves do not require additional local protection providedthat they are mounted at a diameter at least 75 % of that of the shroud, and are of low profile protruding not morethan 30 mm from the surface of the drum.5.4.6 Compensation of openings5.4.6.1Openings shall have their largest dimension N less than 0,5 Do. (See Figure 3).5.4.6.2The total cross-sectional area to be compensated, B, required in any given plane shall not be less thanB = N x S where S is the thickness of an un-pierced dished end or spherical section calculated from the formulae in5.2.2 or 5.2.3.The area of compensation in the parts available for replacement shall be not less than B (see Figure 3). Incalculating this area, only material up to a distance P from the actual surface of the shell may be considered, whereP = (N.te)0,5 .Where the pad is made from a material strength different from the part to be compensated, the area available to beconsidered as compensation shall be multiplied by the ratio of the allowable stresses (fp/fs or fp/fe) as appropriate.5.4.6.3S shall not be less than b1 or s1, except that:a) when the opening and its compensation are located entirely within the spherical portion of a torisphericaldished end, then S shall not be less than the thickness required for a sphere equal to the spherical portion of adished end.b) when the opening and its compensation are located in an ellipsoidal end and are entirely within a circle havingthe radius measured from the centre of 0,40Do, S is the thickness required for a sphere having the equivalentradius Q taken from Table 1. Intermediate values may be taken from Figure 4.SIST EN 14208:2004

The fork apertures shall bepositioned symmetrically about the centre of gravity and their size shall be appropriate to the forks which are to beused to move the drum. The fork apertures shall be designed such that the drum cannot accidentally disengagefrom the forks.6.1.2If lifting lugs are fitted, they shall be designed to withstand a design load of 2 x maximum gross weight.Drums with more than one lifting eye shall be designed such that a minimum sling leg angle of 45° to the horizontalcan be achieved during lifting using the lifting eyes.Where four lifting eyes are used their design shall be such that they are strong enough to allow the drum to be liftedby only two.
Where two or four lifting eyes are used, diametrically opposite lifting eyes shall be aligned with eachother to allow for correct lifting using shackle pins.6.2 Horizontal drumsWhen drums are designed to be carried in the horizontal position, the edge of the shrouds shall be reinforced. Theprofile of the edge of the shroud, or the edge of the drum in the case of dished ends convex to pressure, shallconform to the dimensions given in Figure 5. Dimension k is to be not less than 50 mm, and the angle f not greaterthan 45 °.NOTEThis is to ensure compatibility with the shape of the hooks used.Requirements for lifting lugs shall be as specified in 6.1.2.6.3 Attachment of rolling bandsFor carbon steel vessels to be used in the horizontal position, external rolling bands are not required if the externalsurface is shot blasted and covered with a zinc or aluminium spray before painting in accordance with EN 22063.In the case where rolling bands are fitted to the pressure containing part of the shell, they shall be attached bycontinuous fillet welds on either side of the band.If fitted to a non-pressure part (e.g. a shroud) then intermittent welds of not less than 50 % of the circumference arepermissible. The leg length of these fillet welds shall be not less than 5 mm.7 Manufacturing process - Welding proceduresThe manufacturer shall qualify the specific welding procedures and welders to EN 288 and EN 287 respectively.Records of such qualification shall be kept on file by the manufacturer for a period of at least 10 years.Procedural qualification tests shall be performed in such a manner that the welds shall be representative of thosemade in production.Re-qualifying of the procedure, as well as the welder, shall be required if there is a change in any of the essentialvariables as detailed in EN 287-1, EN ISO 15607 and EN 288-3.SIST EN 14208:2004

Ends distorted inthis heat treatment beyond the allowable limits shall be re-aligned by cold deformation in the press.8.4 Hot pressed dished endsDished ends pressed with plates heated to above 500 °C, do not require heat treatment after forming9 Welded jointsThe welding of the longitudinal and circumferential seams shall be by an automatic or a semi-automatic process.The longitudinal weld, of which there shall be no more than one in a cylindrical section, shall be a full penetrationbutt weld, and any backing bars shall be removed after welding.The circumferential welds shall be a butt weld or a joggle joint weld. Vessels designed for corrosive gases shall notuse joggle joints.10 Surface finish of materialThe external surface finish shall be at least equal to level SA 2.5 in accordance with EN ISO 8501-1.The internal surface finish shall be agreed by the parties. Any scale or corrosion shall be removed by anappropriate method such as shot blasting. The pressure containing parts of the drums shall be examined foruniform quality and freedom from unacceptable defects (in accordance with annex A).Any surface defects such as pits, scrapes, rolled-in scale or pressing marks, shall be ground out so that thereduced thickness is blended in to the rest of the plate at an angle not greater than 1:20.The depths of the defects shall be limited to 1,5 mm. The thickness at all such locations shall be measured andproved to be greater than the minimum specified.11 Assembly11.1 Temporary attachmentsTacking strips, cleats, or any other attachments temporarily welded to the drum to facilitate manufacture shall be ofthe same material as the vessel and shall be completely and carefully removed so as not to damage the drum. Anysurface imperfections remaining after removal shall be made good by repair welding.SIST EN 14208:2004

For a butt joint made from only one side, one root bend test specimen is required.SIST EN 14208:2004
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