Gas cylinders - Refillable seamless steel gas cylinders - Design, construction and testing - Part 2: Quenched and tempered steel cylinders with tensile strength greater than or equal to 1 100 MPa (ISO 9809-2:2010)

ISO 9809-2:2010 specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examination and testing at manufacture of refillable quenched and tempered seamless steel gas cylinders of water capacities from 0,5 l up to and including 150 l for compressed, liquefied and dissolved gases. ISO 9809-2:2010 is applicable to cylinders with a maximum tensile strength Rma of greater than or equal to 1 100 MPa. It is not applicable to cylinders with Rma, max of greater than 1 300 MPa for diameters greater than 140 mm and guaranteed wall thicknesses greater than or equal to 12 mm and Rma, max greater than or equal to 1 400 MPa for diameters of less than or equal to 140 mm and guaranteed wall thicknesses greater than or equal to 6 mm, because beyond these limits, additional requirements can apply.
If desired, cylinders of water capacity less than 0,5 l and between 150 l and 500 l can be manufactured and certified to be in compliance with ISO 9809-2:2010.

Gasflaschen - Wiederbefüllbare nahtlose Gasflaschen aus Stahl - Gestaltung, Konstruktion und Prüfung - Teil 2: Flaschen aus vergütetem Stahl mit einer Zugfestigkeit größer als oder gleich 1 100 MPa (ISO 9809-2:2010)

Dieser Teil von ISO 9809 legt Mindestanforderungen an Werkstoff, Auslegung, Bau und Ausführung,
Herstellungsverfahren, Herstellungsuntersuchungen und -prüfungen von wiederbefüllbaren nahtlosen Gasflaschen
aus vergütetem Stahl mit einem Fassungsraum von 0,5 l bis einschließlich 150 l für verdichtete, verflüssigte
und gelöste Gase fest. Dieser Teil von ISO 9809 gilt für Flaschen mit einer maximalen Zugfestigkeit
Rma ≥ 1 100 MPa. Er gilt nicht für Flaschen mit einer Zugfestigkeit Rma,max > 1 300 MPa für Flaschendurchmesser
> 140 mm und garantierten Mindestwanddicken a' ≥ 12 mm sowie für Flaschen mit einer
Zugfestigkeit Rma,max > 1 400 MPa für Flaschendurchmesser ≤ 140 mm und garantierten Mindestwanddicken
a' ≥ 6 mm, da oberhalb dieser Grenzen möglicherweise zusätzliche Anforderungen gelten.
ANMERKUNG 1 Auf Wunsch können Flaschen mit einem Fassungsraum von weniger als 0,5 l sowie Flaschen mit
einem Fassungsraum zwischen 150 l und 500 l in Übereinstimmung mit diesem Teil von ISO 9809 gefertigt und zertifiziert
werden.
ANMERKUNG 2 Für Flaschen aus vergütetem Stahl mit einer maximalen Zugfestigkeit kleiner als 1 100 MPa wird auf
ISO 9809-1 verwiesen. Für Flaschen aus normalisiertem Stahl wird auf ISO 9809-3 verwiesen.
ANMERKUNG 3 Die Sorten und Festigkeitsbereiche der für diese Flaschentypen verwendeten Stähle sind möglicherweise
mit einigen für den Betrieb vorgesehenen Gasen (siehe 6.1.4) und Betriebsbedingungen nicht verträglich.

Bouteilles à gaz - Bouteilles à gaz rechargeables en acier sans soudure - Conception, construction et essais - Partie 2: Bouteilles en acier trempé et revenu ayant une résistance à la traction supérieure ou égale à 1 100 MPa (ISO 9809-2:2010, Version corrigée 2015-10-15)

L'ISO 9809-2:2010 prescrit les exigences minimales concernant le matériau, la conception, la construction et la mise en oeuvre, les modes de fabrication, les examens et les essais au moment de la fabrication des bouteilles à gaz rechargeables, en acier trempé et revenu sans soudure, d'une capacité en eau comprise entre 0,5 l et 150 l inclus, pour gaz comprimés, liquéfiés ou dissous. L'ISO 9809-2:2009 s'applique aux bouteilles ayant une résistance maximale à la traction, Rma, supérieure ou égale à 1 100 MPa. Elle ne couvre pas les bouteilles dont Rma, max est supérieure à 1 300 MPa pour un diamètre supérieur à 140 mm et une épaisseur de paroi garantie supérieure ou égale à 12 mm, et dont Rma, max est supérieure ou égale à 1 400 MPa pour un diamètre inférieur ou égal à 140 mm et une épaisseur de paroi garantie supérieure ou égale à 6 mm; en effet, au-delà de ces limites, des exigences supplémentaires peuvent s'appliquer.
Si on le désire, les bouteilles d'une capacité en eau inférieure à 0,5 l et les bouteilles d'une capacité en eau comprise entre 150 l et 500 l peuvent être fabriquées et certifiées conformément à l'ISO 9809-2:2010.

Plinske jeklenke - Ponovno polnljive plinske jeklenke iz celega - Konstruiranje, izdelava in preskus - 2. del: Jeklenke iz jekel za poboljšanje z natezno trdnostjo, enako ali večjo od 1100 MPa (ISO 9809-2:2010)

Ta del ISO 9809 določa minimalne zahteve za material, konstruiranje, izdelavo in strokovnost izvedbe, proizvodne postopke, pregled in preskušanje pri proizvodnji ponovno polnljivih plinskih jeklenk iz celega, iz jekel za poboljšanje, z vodno kapaciteto od 0,5 l do vključno 150 l za stisnjene, utekočinjene in raztopljene pline.  Ta del ISO 9809 se uporablja za jeklenke z najvišjo natezno trdnostjo Rma W 1100 MPa. Ne uporablja se za jeklenke z Rma, maksimum > 1300 MPa za premere > 140 mm in zagotovljeno debelino stene a' W 12 mm in Rma, maksimum > 1400 MPa za premere u 140 mm in zagotovljeno debelino stene a' W 6 mm, ker onkraj teh omejitev lahko veljajo dodatne zahteve.

General Information

Status
Withdrawn
Publication Date
14-Apr-2010
Withdrawal Date
08-Oct-2019
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
09-Oct-2019

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SLOVENSKI STANDARD
SIST EN ISO 9809-2:2010
01-november-2010
1DGRPHãþD
SIST EN 1964-2:2002
3OLQVNHMHNOHQNH3RQRYQRSROQOMLYHSOLQVNHMHNOHQNHL]FHOHJD.RQVWUXLUDQMH

L]GHODYDLQSUHVNXVGHO-HNOHQNHL]MHNHO]DSREROMãDQMH]QDWH]QRWUGQRVWMR

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Gas cylinders - Refillable seamless steel gas cylinders - Design, construction and testing

- Part 2: Quenched and tempered steel cylinders with tensile strength greater than or

equal to 1 100 MPa (ISO 9809-2:2010)
Gasflaschen - Wiederbefüllbare, nahtlose Gasflaschen aus Stahl - Gestaltung,

Konstruktion und Prüfung - Teil 2: Flaschen aus vergütetem Stahl mit einer Zugfestigkeit

größer oder gleich 1 100 MPa (ISO 9809-2:2010)

Bouteilles a gaz - Bouteilles a gaz rechargeables en acier sans soudure - Conception,

construction et essais - Partie 2: Bouteilles en acier trempé et revenu ayant une

résistance a la traction supérieure ou égale a 1 100 MPa (ISO 9809-2:2010)
Ta slovenski standard je istoveten z: EN ISO 9809-2:2010
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
SIST EN ISO 9809-2:2010 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 9809-2:2010
---------------------- Page: 2 ----------------------
SIST EN ISO 9809-2:2010
EUROPEAN STANDARD
EN ISO 9809-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2010
ICS 23.020.30 Supersedes EN 1964-2:2001
English Version
Gas cylinders - Refillable seamless steel gas cylinders - Design,
construction and testing - Part 2: Quenched and tempered steel
cylinders with tensile strength greater than or equal to 1 100
MPa (ISO 9809-2:2010)

Bouteilles à gaz - Bouteilles à gaz rechargeables en acier Gasflaschen - Wiederbefüllbare nahtlose Gasflaschen aus

sans soudure - Conception, construction et essais - Partie Stahl - Gestaltung, Konstruktion und Prüfung - Teil 2:

2: Bouteilles en acier trempé et revenu ayant une Flaschen aus vergütetem Stahl mit einer Zugfestigkeit

résistance à la traction supérieure ou égale à 1 100 MPa größer als oder gleich 1 100 MPa (ISO 9809-2:2010)

(ISO 9809-2:2010)
This European Standard was approved by CEN on 18 March 2010.

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 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 translation

under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the

official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9809-2:2010: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 9809-2:2010
EN ISO 9809-2:2010 (E)
Contents Page

Foreword ..............................................................................................................................................................3

Annex NA (normative) Specific European requirements .................................................................................4

---------------------- Page: 4 ----------------------
SIST EN ISO 9809-2:2010
EN ISO 9809-2:2010 (E)
Foreword

This document (EN ISO 9809-2:2010) has been prepared by Technical Committee ISO/TC 58 "Gas cylinders"

in collaboration with 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 October 2010, and conflicting national standards shall be withdrawn at

the latest by October 2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 1964-2:2001.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For Specific European requirements, see normative Annex NA, which is an integral part of this document.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, 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 the United Kingdom.
Endorsement notice

The text of ISO 9809-2:2010 has been approved by CEN as a EN ISO 9809-2:2010 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 9809-2:2010
EN ISO 9809-2:2010 (E)
Annex NA
(normative)
Specific European requirements
NA.1 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 473, Non-destructive testing — Qualification and certification of NDT personnel — General principles

EN ISO 11114-4, Transportable gas cylinders — Compatibility of cylinder and valve materials with gas

contents — Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement

EN ISO 13769, Gas cylinders — Stamp marking
NA.2 Technical requirements

With reference to the clauses in the main body of the text, the following additional requirements shall apply:

5 Inspection and testing
The following informative note shall be added to Clause 5:

“NOTE The conformity of cylinders shall be assessed in accordance with the regulations in force at the time of

manufacture. RID/ADR/ADN includes requirements for conformity assessment consisting of type approval, supervision of

manufacture and initial inspection and test. If conformity is assessed in accordance with Council Directive 99/36/EC on

transportable pressure equipment (TPED), modules B+D or B+F should be used. If other modules are used, the cylinders

will not be in conformity with this standard and the number of this standard shall not be marked.”

11.2 Hydraulic test
11.2.2 Volumetric expansion test

"NOTE The initial inspection and tests regarding hydraulic test are regulated by RID, ADR which take precedence over

Clause 11.2.2.
13 Marking
Marking shall be in accordance with EN ISO 13769.

"NOTE The marking of gas cylinders is regulated by RID, ADR and ADN which take precedence over any clause in this

standard. The European Directive on the TPED includes additional marking requirements (π-marking). It is important to

know that these provisions are subject to regular revisions. This may lead to temporary noncompliance with EN ISO

13769.”
---------------------- Page: 6 ----------------------
SIST EN ISO 9809-2:2010
EN ISO 9809-2:2010 (E)
Annex A
Annex A shall be taken as normative.
B.2 General requirements

The second paragraph shall be replaced by the following: “The operation of the test equipment shall be by

personnel certified at least to level 1 of EN 473 and supervised by qualified and experienced personnel

certified to level 2 or level 3 of EN 473.
Additionally the following note shall be added to the end of this clause:

"NOTE As it is considered that the qualifications of personnel according to EN 473 and ISO 9712 are comparable,

certification of the personnel to either standard should be accepted.”
---------------------- Page: 7 ----------------------
SIST EN ISO 9809-2:2010
---------------------- Page: 8 ----------------------
SIST EN ISO 9809-2:2010
INTERNATIONAL ISO
STANDARD 9809-2
Second edition
2010-04-15
Gas cylinders — Refillable seamless steel
gas cylinders — Design, construction and
testing —
Part 2:
Quenched and tempered steel cylinders
with tensile strength greater than or equal
to 1 100 MPa
Bouteilles à gaz — Bouteilles à gaz rechargeables en acier sans
soudure — Conception, construction et essais —
Partie 2: Bouteilles en acier trempé et revenu ayant une résistance à la
traction supérieure ou égale à 1 100 MPa
Reference number
ISO 9809-2:2010(E)
ISO 2010
---------------------- Page: 9 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)
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ii © ISO 2010 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Symbols..................................................................................................................................................3

5 Inspection and testing ..........................................................................................................................4

6 Materials .................................................................................................................................................4

7 Design.....................................................................................................................................................7

8 Construction and workmanship ........................................................................................................11

9 Type approval procedure....................................................................................................................13

10 Batch tests ...........................................................................................................................................19

11 Tests/examinations on every cylinder ..............................................................................................27

12 Certification..........................................................................................................................................28

13 Marking.................................................................................................................................................29

Annex A (informative) Description and evaluation of manufacturing imperfections and conditions

for rejection of seamless steel gas cylinders at time of final visual inspection by the

manufacturer........................................................................................................................................30

Annex B (normative) Ultrasonic examination................................................................................................36

Annex C (informative) Type approval certificate ...........................................................................................42

Annex D (informative) Acceptance certificate................................................................................................43

Bibliography......................................................................................................................................................45

© ISO 2010 – All rights reserved iii
---------------------- Page: 11 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 9809-2 was prepared by Technical Committee ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder

design.

This second edition cancels and replaces the first edition (ISO 9809-2:2000), which has been technically

revised.

a) the reduction of maximum sulfur content in 6.2.2 from 0,010 % to 0,005 %, which is now applicable to all

strength levels;

b) the note in 7.3 regarding limitation of the F factor was deleted (as required by the United Nations

Recommendations on the Transport of Dangerous Goods: Model Regulations);

c) the modification of provisions for ultrasonic examination in 8.4 to include ultrasonic examination on the

cylindrical area to be closed, prior to the forming process;

d) the addition of the requirement of a base check according to 9.2.6 for all cylinder types during prototype

testing;

e) the addition of the requirement of a base check according to 9.2.6 for cylinders made from continuously

cast billet material during batch testing.

ISO 9809 consists of the following parts, under the general title Gas cylinders — Refillable seamless steel gas

cylinders — Design, construction and testing:

⎯ Part 1: Quenched and tempered steel cylinders with tensile strength less than 1 100 MPa

⎯ Part 2: Quenched and tempered steel cylinders with tensile strength greater than or equal to 1 100 MPa

⎯ Part 3: Normalized steel cylinders

Stainless steel cylinders with tensile strength of less than 1 100 MPa will form the subject of a part 4.

iv © ISO 2010 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)
Introduction

This part of ISO 9809 provides a specification for the design, manufacture, inspection and testing of a

seamless steel cylinder for worldwide usage. The objective is to balance design and economic efficiency

against international acceptance and universal utility.

ISO 9809 (all parts) aims to eliminate existing concern; about climate, duplicate inspections and restrictions

because of a lack of definitive International Standards. This part of ISO 9809 should not be construed as

reflecting on the suitability of the practice of any nation or region.

This part of ISO 9809 addresses the general requirements on design, construction and initial inspection and

test of pressure receptacles of the United Nations Recommendations on the Transport of Dangerous Goods:

Model Regulations.

It is intended to be used under a variety of regulatory regimes, but is suitable for use with the conformity

assessment system in 6.2.2.5 of the above-mentioned Model Regulations.
© ISO 2010 – All rights reserved v
---------------------- Page: 13 ----------------------
SIST EN ISO 9809-2:2010
---------------------- Page: 14 ----------------------
SIST EN ISO 9809-2:2010
INTERNATIONAL STANDARD ISO 9809-2:2010(E)
Gas cylinders — Refillable seamless steel gas cylinders —
Design, construction and testing —
Part 2:
Quenched and tempered steel cylinders with tensile strength
greater than or equal to 1 100 MPa
1 Scope

This part of ISO 9809 specifies minimum requirements for the material, design, construction and workmanship,

manufacturing processes, examination and testing at manufacture of refillable quenched and tempered

seamless steel gas cylinders of water capacities from 0,5 l up to and including 150 l for compressed, liquefied

and dissolved gases. This part of ISO 9809 is applicable to cylinders with a maximum tensile strength

R W 1 100 MPa. It is not applicable to cylinders with R > 1 300 MPa for diameters > 140 mm and

ma ma, max

guaranteed wall thicknesses a′ W 12 mm and R > 1 400 MPa for diameters u 140 mm and guaranteed

ma, max

wall thicknesses a′ W 6 mm, because beyond these limits, additional requirements can apply.

NOTE 1 If desired, cylinders of water capacity less than 0,5 l and between 150 l and 500 l can be manufactured and

certified to be in compliance with this part of ISO 9809.

NOTE 2 For quenched and tempered steel cylinders with maximum tensile strength less than 1 100 MPa, see

ISO 9809-1. For normalized steel cylinders, see ISO 9809-3.

NOTE 3 Grades and strength ranges of steels used for these types of cylinders might not be compatible with some gas

service (see 6.1.4) and operational conditions.
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.

ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method

ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method

ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,

K, N, T)

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 7438, Metallic materials — Bend test

ISO 9329-1, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 1: Unalloyed

steels with specified room temperature properties
ISO 9712, Non-destructive testing — Qualification and certification of personnel
© ISO 2010 – All rights reserved 1
---------------------- Page: 15 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)

ISO 11114-1, Transportable gas cylinders — Compatibility of cylinder and valve materials with gas

contents — Part 1: Metallic materials
ISO 13769, Gas cylinders — Stamp marking
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
batch

quantity of up to 200 cylinders plus cylinders for destructive testing of the same nominal diameter, thickness,

length and design made successively on the same equipment, from the same cast of steel and subjected to

the same heat treatment for the same duration of time
3.2
burst pressure
highest pressure reached in a cylinder during a burst test
3.3
design stress factor

ratio of equivalent wall stress at test pressure, p , to guaranteed minimum yield strength, R

h eg
3.4
quenching

hardening heat treatment in which a cylinder, which has been heated to a uniform temperature above the

upper critical point, Ac , of the steel, is cooled rapidly in a suitable medium
3.5
tempering

toughening heat treatment which follows quenching, in which the cylinder is heated to a uniform temperature

below the lower critical point, Ac , of the steel
3.6
test pressure
required pressure applied during a pressure test
NOTE It is used for cylinder wall thickness calculation.
3.7
working pressure

settled pressure of a compressed gas at a uniform reference temperature of 15 °C in a full gas cylinder

3.8
yield strength

stress value corresponding to the upper yield strength, ReH, or for steels which do not exhibit a defined yield,

the 0,2 % proof strength (non-proportional extension), Rp0, 2 (see ISO 6892-1)
2 © ISO 2010 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)
4 Symbols
a Calculated minimum thickness, in millimetres, of the cylindrical shell
a′ Guaranteed minimum thickness, in millimetres, of the cylindrical shell

a Guaranteed minimum thickness, in millimetres, of a concave base at the knuckle (see Figure 2)

a Guaranteed minimum thickness, in millimetres, at the centre of a concave base (see Figure 2)

A Percentage elongation after fracture

b Guaranteed minimum thickness, in millimetres, at the centre of a convex base (see Figure 1)

c Maximum permissible deviation of burst profile, in millimetres (see Figure 12 and Figure 13)

d Depth of artificial flaw, in millimetres, in flawed cylinder burst test and flawed cylinder cycle test

(see Figure 5)

D Nominal outside diameter of the cylinder, in millimetres (see Figure 1 and Figure 2)

D External diameter, in millimetres, of cutter milling tool for flawed cylinder burst test and flawed

cylinder cycle test (see Figure 5)
D Diameter, in millimetres, of former (see Figure 8)
F Design stress factor (variable) (see 3.3)
h Outside depth (concave base end), in millimetres (see Figure 2)

H Outside height, in millimetres, of domed part (convex head or base end) (see Figure 1)

l Length of artificial flaw, in millimetres, in flawed cylinder burst test and flawed cylinder cycle test

(see Figure 5)
l Length of cylindrical part of the cylinder, in millimetres (see Figure 3)
L Original gauge length, in millimetres, as defined in ISO 6892-1 (see Figure 7)

n Ratio of the diameter of the bend test former to actual thickness of test piece, t

p Measured burst pressure, in bars , above atmospheric pressure
p Measured failure pressure, in bars, above atmospheric pressure
p Hydraulic test pressure, in bars, above atmospheric pressure

p Observed pressure when cylinder starts yielding during hydraulic bursting test, in bars, above

atmospheric pressure
r Inside knuckle radius, in millimetres (see Figure 1 and Figure 2)

r Cutter tip radius of milling tool for artificial flaw, in millimetres, for flawed cylinder burst test and

flawed cylinder cycle test (see Figure 5)

R Minimum guaranteed value of the yield strength (see 7.1.1), in megapascals, for the finished

cylinder

R Actual value of the yield strength, in megapascals, as determined by the tensile test (see 10.2)

1) 1 bar = 10 Pa = 0,1 MPa.
© ISO 2010 – All rights reserved 3
---------------------- Page: 17 ----------------------
SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)

R Minimum guaranteed value of the tensile strength, in megapascals, for the finished cylinder

R Actual value of tensile strength, in megapascals, as determined by the tensile test (see 10.2)

R Maximum actual value of the tensile strength range, in megapascals
ma, max
R Minimum actual value of the tensile strength range, in megapascals
ma, min

S Original cross-sectional area of tensile test piece, in square millimetres, in accordance with

ISO 6892-1
t Actual thickness of the test specimen, in millimetres

t Average cylinder wall thickness at position of testing during the flattening test, in millimetres

V Water capacity of cylinder, in litres
w Width, in millimetres, of the tensile test piece (see Figure 7)
5 Inspection and testing

NOTE Evaluation of conformity can be carried out according to the regulations recognized by the country(ies) in

which the cylinders are intended to be used.

To ensure that the cylinders conform to this part of ISO 9809, they shall be subject to inspection and testing in

accordance with Clauses 9, 10 and 11 by an inspection body (hereinafter referred to as "the inspector")

authorized to do so.

Equipment used for measurement, testing and examination during production shall be maintained and

calibrated within a documented quality management system.
6 Materials
6.1 General requirements

6.1.1 Materials for the manufacture of gas cylinders shall fall within one of the following categories:

a) internationally recognized cylinder steels;
b) nationally recognized cylinder steels;
c) new cylinder steels resulting from technical progress.

For all categories, the relevant conditions specified in 6.2 and 6.3 shall be satisfied.

6.1.2 The material used for the manufacture of gas cylinders shall be steel, other than rimming quality, with

non-ageing properties, and shall be fully killed with aluminium and/or silicon.

In cases where examination of this non-ageing property is required by the customer, the criteria by which it is

to be specified should be agreed with the customer and inserted in the order.

6.1.3 The cylinder manufacturer shall establish means to identify the cylinders with the cast of steel from

which they are made.
4 © ISO 2010 – All rights reserved
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SIST EN ISO 9809-2:2010
ISO 9809-2:2010(E)

6.1.4 High strength cylinders made in accordance with this part of ISO 9809 are normally not compatible

with corrosive or embrittling gases (see ISO 11114-1). They may nevertheless be used with these gases

provided that their compatibility is proven by a recognized test method, e.g. ISO 11114-4.

6.1.5 Wherever continuously cast billet material is used, the manufacturer shall ensure that there are no

deleterious imperfections (porosity) in the material to be used for making cylinders (see 9.2.6)

6.2 Controls on chemical composition
6.2.1 The chemical composition of all steels shall be defined at least by:
⎯ the carbon, manganese and silicon contents in all cases;

⎯ the chromium, nickel and molybdenum contents or other alloying elements intentionally added to the

steel;
⎯ the maximum sulfur and phosphorus contents in all cases.

The carbon, manganese and silicon contents and, where appropriate, the chromium, nickel and molybdenum

contents shall be given, with tolerances, such that the differences between the maximum and minimum values

of the cast do not exceed the values shown in Table 1.
Table 1 — Chemical composition tolerances
Element Maximum content Permissible range
(mass fraction) (mass fraction)
% %
Carbon < 0,30 % 0,03
W 0,30 % 0,04
Manganese All values 0,20
Silicon All values 0,15
Chromium < 1,20 % 0,20
W 1,20 % 0,30
Nickel All values 0,30
Molybdenum < 0,50 % 0,10
W 0,50 % 0,15

The combined content of the following elements: vanadium, niobium, titanium, boron and zirconium, shall not

exceed 0,15 %.

The actual content of any element deliberately added shall be reported and their maximum content shall be

representative of good steel making practice.

6.2.2 Sulfur and phosphorus in the cast analysis of material used for the manufacture of gas cylinders shall

not exceed the values shown in Table 2.
Table 2 — Maximum sulfur and phosphorus limits in % (mass fraction)
Sulfur 0,005
Phosphorus 0,015
© ISO 2010 – All rights reserved 5
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