EN 12257:2002
(Main)Transportable gas cylinders - Seamless, hoop-wrapped composite cylinders
Transportable gas cylinders - Seamless, hoop-wrapped composite cylinders
This European Standard specifies minimum requirements for the materials, design, construction, prototype testing and routine manufacturing inspections of composite gas cylinders with a water capacity up to and including 450 litres for compressed, liquefied and dissolved gases.
NOTE For the purposes of this standard, the word "cylinder" includes tubes up to 450 litres water capacity.
This standard is applicable to cylinders that comprise a seamless metal liner reinforced over a substantial part of the parallel length by wound composite fibres of glass, carbon, aramid, or wire.
This standard is not applicable to gas cylinders which are almost totally covered with fibres and commonly called "fully-wrapped" cylinders. For fully-wrapped composite cylinders see prEN 12245.
NOTE The specification does not address the design, fitting and performance of removable protective sleeves. Where these are fitted they should be considered separately.
Ortsbewegliche Gasflaschen - Nahtlose umfangsgewickelte Flaschen aus Verbundwerkstoffen
Diese Norm enthält Mindestanforderungen an die Werkstoffe, die Gestaltung, Konstruktion, die Bauartzulassungen, Baureihen- und Abnahmeprüfungen von Flaschen aus Verbundwerkstoffen mit einem Fassungsraum bis zu 450 Litern für verdichtete, verflüssigte und unter Druck gelöste Gase.
ANMERKUNG Für die Anwendung dieser Norm umfasst das Wort "Flasche" auch Großflaschen mit einem Fassungsraum bis zu 450 Litern.
Diese Norm ist auf Flaschen anwendbar, die aus einem nahtlosen Liner aus Metall bestehen, und die über den größten Teil der parallelen Länge mit einem Wickelverbund aus Glas-, Kohlenstoff-, Aramid- oder Stahl (Draht) verstärkt sind.
Die vorliegende Norm gilt nicht für Gasflaschen, die mit Faserwerkstoffen vollumwickelt sind und allgemein als "vollumwickelte" Flaschen bezeichnet werden. Für diese gilt EN 12245.
ANMERKUNG Diese Festlegungen beinhalten nicht die Gestaltung, Montage und das Verhalten von abnehmbaren Schutzhüllen. Dies sollte separat betrachtet werden.
Bouteilles à gaz transportables - Bouteilles sans soudure, frettées composites
La présente Norme européenne spécifie les exigences minimales relatives aux matériaux, à la conception, à la construction, aux essais de prototype et aux contrôles courants en fabrication, des bouteilles à gaz composites, d'une contenance en eau inférieure ou égale à 450 litres, pour gaz comprimés, liquéfiés et dissous.
NOTE 1 Pour les besoins de la présente norme, le mot « bouteille » englobe les tubes d'une contenance en eau inférieure ou égale à 450 l.
La présente norme s'applique aux bouteilles constituées d'un liner métallique sans soudure renforcé sur une portion substantielle de sa partie cylindrique par un enroulement composite en fibres de verre, de carbone, d'aramide ou par un fil métallique.
La présente norme ne s'applique pas aux bouteilles à gaz presque totalement recouvertes de fibres, couramment appelées "bouteilles entièrement bobinées". Pour les bouteilles composites entièrement bobinées, voir l'EN 12245.
NOTE 2 Cette spécification ne traite pas de la conception, du montage et des performances des gaines de protection amovibles. Lorsque celles-ci sont montées, il convient de les considérer séparément.
Premične plinske jeklenke - Jeklenke iz celega, obročasto obvite s kompozitno maso
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2002
3UHPLþQHSOLQVNHMHNOHQNH-HNOHQNHL]FHOHJDREURþDVWRREYLWHVNRPSR]LWQR
PDVR
Transportable gas cylinders - Seamless, hoop-wrapped composite cylinders
Ortsbewegliche Gasflaschen - Nahtlose umfangsgewickelte Flaschen aus
Verbundwerkstoffen
Bouteilles a gaz transportables - Bouteilles sans soudure, frettées composites
Ta slovenski standard je istoveten z: EN 12257:2002
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 12257
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2002
ICS 23.020.30
English version
Transportable gas cylinders - Seamless, hoop-wrapped
composite cylinders
Bouteilles à gaz transportables - Bouteilles sans soudure, Ortsbewegliche Gasflaschen - Nahtlose umfangsgewickelte
frettées composites Flaschen aus Verbundwerkstoffen
This European Standard was approved by CEN on 9 November 2001.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards 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 translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12257:2002 E
worldwide for CEN national Members.
Contents
page
Foreword .3
Introduction .4
1 Scope.5
2 Normative references.5
3 Terms, definitions and symbols .6
4 Design and manufacture .7
5 Cylinder and material tests .10
6 Conformity evaluation .21
7 Marking.21
Annex A (normative) Prototype testing, design variant testing and production testing .22
Annex B (informative) Examples of type approval and production testing certificates .33
Bibliography .37
Foreword
This document EN 12257:2002 has been prepared by Technical Committee CEN/TC 23
"Transportable gas cylinders", the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2002, and conflicting national standards shall
be withdrawn at the latest by August 2002.
This European Standard has been prepared under a mandate given to CEN by the European
Commission and the European Free Trade Association, and supports the objectives of the framework
Directives on Transport of Dangerous Goods.
This European Standard has been submitted for reference into the RID and/or the technical annexes
of the ADR. Therefore in this context the standards listed in the normative references and covering
basic requirements of the RID/ADR not addressed within the present standard are normative only
when the standards themselves are referred to in the RID and/or the technical annexes of the ADR.
Annex A is normative and annex B is informative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries 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.
Introduction
The purpose of this standard is to provide a specification for the design, manufacture, inspection and
testing of refillable transportable seamless, hoop wrapped composite cylinders.
The specifications given are based on knowledge of, and experience with, materials, design
requirements, manufacturing processes and control during manufacture of cylinders in common use in
the countries of the CEN members.
1 Scope
This European Standard specifies minimum requirements for the materials, design, construction,
prototype testing and routine manufacturing inspections of composite gas cylinders with a water
capacity up to and including 450 litres for compressed, liquefied and dissolved gases.
NOTE For the purposes of this standard, the word “cylinder” includes tubes up to 450 litres water capacity.
This standard is applicable to cylinders that comprise a seamless metal liner reinforced over a
substantial part of the parallel length by wound composite fibres of glass, carbon, aramid, or wire.
This standard is not applicable to gas cylinders which are almost totally covered with fibres and
commonly called "fully-wrapped" cylinders. For fully-wrapped composite cylinders see EN 12245.
NOTE The specification does not address the design, fitting and performance of removable protective
sleeves. Where these are fitted they should be considered separately.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate place in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications
apply to this European Standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
EN 1089-1, Transportable gas cylinders— Gas cylinder identification (excluding LPG) –
Part 1: Stampmarking.
EN 1964-1, Transportable gas cylinders — Specification for the design and construction of refillable
transportable seamless steel gas cylinders of water capacities from 0,5 litre up to and including 150
litres — Part 1: Cylinders made of seamless steel with an R value of less than 1 100 MPa.
m
prEN 1964-2, Transportable gas cylinders — Specification for the design and construction of refillable
transportable seamless steel gas cylinders from 0,5 litres up to and including 150 litres — Part 2:
Tensile strength (R max) 1 100 MPa.
m
EN 1964-3, Transportable gas cylinders — Specification for the design and construction of refillable
transportable seamless steel gas cylinders of capacity from 0,5 litres up to 150 litres — Part 3:
Stainless steel cylinders.
EN 1975, Transportable gas cylinders — Specification for the design and construction of refillable
transportable seamless aluminium and aluminium alloy gas cylinders of capacity from 0,5 l up to 150 l.
EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test (at ambient temperature)
EN ISO 11114-1, Transportable gas cylinders — Compatibility of cylinder and valve materials with gas
contents — Part 1: Metallic Materials (ISO 11114-1:1997).
EN ISO 11120, Gas Cylinders — Refillable seamless steel tubes of water capacity between 150 l
and 3000 l — Design, construction and testing (ISO 11120:1999).
EN ISO 13341, Transportable gas cylinders — Fitting of valves to gas cylinders (ISO 13341:1997).
ASTM D 2290-92, Test method for apparent tensile strength of ring or tubular plastics and reinforced
plastics by split disk method.
ASTM D 2291-83, Fabrication of ring test specimens for glass-resin composites.
ASTM D 2343-95, Test method for tensile properties of glass fibre strands, yarns and rovings used in
reinforced plastics.
ASTM D 4018-93, Test methods for tensile properties of continuous filament carbon and graphite fiber
tows.
3 Terms, definitions and symbols
For the purposes of this European Standard, the following terms, definitions and symbols apply.
3.1 Terms and definitions
3.1.1
ambient temperature
temperature of surroundings varying between 10 °C and 35 °C (for test purposes only)
3.1.2
autofrettage
pressure application procedure which strains the metal liner past its yield point sufficiently to cause
permanent plastic deformation, and results in the liner having compressive stresses and the fibres
having tensile stresses internally when at zero internal gauge pressure
3.1.3
batch, (of fibres, wires or components of the resin system)
homogeneous quantity of material, identified and certified as such by the supplier
3.1.4
batch, (of metallic liners)
quantity of liners of the same nominal diameter, thickness, length and design, made successively from
the same material cast and subjected to the same heat treatment for the same length of time
3.1.5
batch, (of finished cylinders with liners)
quantity of up to 200 finished cylinders plus finished cylinders required for destructive testing, of the
same nominal diameter, thickness, length and design. The batch may contain different batches of
liners (providing the batches are nominally the same and have had the same treatments), fibres and
matrix materials
3.1.6
burst pressure
highest pressure reached in a cylinder or liner during the relevant burst test
3.1.7
composite overwrap
fibres and matrix taken together as a combined unit, or wire reinforcement
3.1.8
exterior coating
layer of clear or pigmented material applied to the cylinder for protection or for cosmetic purposes
3.1.9
fibre or strand
load-carrying part of the composite overwrap e.g. glass, aramid or carbon
3.1.10
hoop-wrapped cylinder
cylinder with composite overwrap along the cylindrical portion of the liner which carries part of the
circumferential stress
3.1.11
liner
metallic cylinder that contains the gas and provides a substantial structural strength to the composite
cylinder
3.1.12
matrix
material which is used to bind and hold the fibres in place
3.1.13
rejected cylinder
cylinder which in its present condition has not passed the test requirements
3.1.14
wire reinforcement
load carrying overwrap, using a metallic wire (e.g. steel), that does not require a matrix
3.2 Symbols
1)
p actual burst pressure of composite cylinder, in bar above atmospheric pressure
b
1)
p burst pressure of liner, in bar above atmospheric pressure
bL
1)
p minimum burst pressure of composite cylinder obtained during design variant testing, in bar
bmin
above atmospheric pressure
1)
p hydraulic test pressure of composite cylinder, in bar above atmospheric pressure
h
4 Design and manufacture
4.1 General
A hoop-wrapped composite gas cylinder shall comprise the following parts:
4.1.1
An internal metal liner, which carries the total longitudinal load and a substantial circumferential
load; and either
a composite overwrap formed by layers of continuous fibres in a matrix; or
wire reinforcement.
An optional exterior coating to provide external protection. When this is an integral part of the
design it shall be permanent.
1) 1 bar = 10 Pa = 0,1 MPa.
The cylinder can also include additional parts such as rings, bases, etc.
4.1.2 Cylinders shall be designed with one or two openings along the central axis only.
4.2 Liner
4.2.1 Liner materials
The liners shall be manufactured in accordance with the relevant sections of the following European
standards:
a) seamless steel liners: EN 1964-1 or prEN 1964-2 as appropriate;
b) seamless stainless steel liners: EN 1964-3;
c) seamless aluminium alloy liners: EN 1975;
d) steel tubes (i.e. >150 l): EN ISO 11120.
The relevant sections are: materials, thermal treatments, neck design, construction and workmanship,
mechanical tests.
NOTE This excludes the design requirements, since these are specified by the manufacturer for the design
of the composite cylinder. For liners with water capacity above 150 l manufactured of stainless steel or aluminium
alloy the relevant sections of the appropriate standard also apply.
The liner material shall be compatible with the gases intended to be used as determined by
EN ISO 11114-1.
4.2.2 Design drawing
A fully dimensioned drawing of the liner shall be supplied which includes the specification of the
material and material properties. The following material properties shall be specified:
minimum yield stress;
minimum tensile strength;
minimum elongation;
minimum burst pressure;
compatibility with the contained gas as determined by EN ISO 11114-1.
4.2.3 Design of ends (heads and bases)
The design of the ends shall be in accordance with the general requirements of the relevant cylinder
standard (as identified in 4.2.1). In order to achieve satisfactory stress distribution, the liner wall
thickness shall increase
...
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