Gas cylinders - Refillable seamless steel tubes of water capacity between 150 l and 3000 l - Design, construction and testing (ISO 11120:2015)

ISO 11120:2015 specifies minimum requirements for the material, design, construction and workmanship, manufacturing processes, examinations and tests at manufacture of refillable quenched and tempered seamless steel tubes of water capacities exceeding 150 l up to and including 3 000 l for compressed and liquefied gases exposed to extreme world-wide ambient temperatures, normally between ?50 °C and 65 °C.
ISO 11120:2015 is applicable to tubes with a maximum tensile strength, Rma, of less than 1 100 MPa. These tubes can be used alone or in batteries to equip trailers or multiple element gas containers (ISO modules or skids) for the transportation and distribution of compressed gases.
ISO 11120:2015 is applicable to tubes having an opening at each end.

Gasflaschen - Wiederbefüllbare nahtlose Großflaschen aus Stahl mit einem Fassungsraum zwischen 150 l und 3 000 l - Auslegung, Bau und Prüfung (ISO 11120:2015)

Diese Internationale Norm legt Mindestanforderungen an Werkstoff, Auslegung, Bau und Ausführungsgüte, Herstellungsverfahren, Untersuchungen und Prüfungen zum Zeitpunkt der Herstellung von wiederbefüllbaren vergüteten nahtlosen Großflaschen aus Stahl mit einem Fassungsraum von über 150 l bis einschließlich 3 000 l für verdichtete und verflüssigte Gase, die extremen weltweiten Umgebungstemperaturen (im Allgemeinen zwischen -50 °C und +65 °C) ausgesetzt sind, fest.
Diese Internationale Norm gilt für Großflaschen mit einer maximalen Zugfestigkeit, Rma, kleiner als 1 100 MPa. Diese Großflaschen können einzeln oder in Batterien für die Ausrüstung von Anhängern oder Gascontainern mit mehreren Elementen (ISO-Module oder -Gestelle) für die Beförderung von und Versorgung mit verdichteten Gasen verwendet werden.
Diese Internationale Norm gilt für Großflaschen, die eine Öffnung an jedem Flaschenende haben.

Bouteilles à gaz - Tubes en acier sans soudure rechargeables d'une contenance en eau de 150 l à 3000 l - Conception, construction et essais (ISO 11120:2015)

L'ISO 11120:2015 spécifie les exigences minimales relatives au matériau, à la conception, à la construction et à l'exécution, aux procédés de fabrication, aux contrôles et aux essais au moment de la fabrication des tubes en acier sans soudure, trempés et revenus, rechargeables, d'une contenance en eau de plus de 150 litres à 3 000 litres inclus, destinés aux gaz comprimés et liquéfiés exposés à des températures ambiantes extrêmes, généralement comprises entre ?50 °C et 65 °C.
L'ISO 11120:2015 s'applique aux tubes de résistance à la traction maximale, Rma, inférieure à 1 100 MPa. Ces tubes peuvent être utilisés seuls ou en batteries afin d'équiper des remorques ou des conteneurs à gaz à éléments multiples (modules ISO ou skids) pour le transport et la distribution de gaz comprimés.
L'ISO 11120:2015 est applicable aux tubes ayant une ouverture à chaque extrémité.

Plinske jeklenke - Ponovno polnljive velike jeklenke iz celega iz jekla z vodno prostornino od 150 do 3000 l - Konstruiranje, izdelava in preskušanje (ISO 11120:2015)

Ta mednarodni standard določa minimalne zahteve za material, konstruiranje, izdelavo in izvedbo, postopke izdelave in preskuse ob času izdelave ponovno polnljivih velikih jeklenk iz kaljenega in popuščenega jekla vodne prostornine več kot 150 l do vključno 3000 l za stisnjene in utekočinjene pline, izpostavljene ekstremnim temperaturam okolja po vsem svetu (običajno med –50 °C in +65 °C).
Ta mednarodni standard se uporablja za jeklenke z največjo natezno trdnostjo Rma, manjšo od 1100 MPa. Te jeklenke je mogoče uporabljati samostojno ali v akumulatorjih za opremo prikolic ali plinskih posod iz več elementov (moduli ali drsniki ISO) za prevoz in distribucijo stisnjenih plinov. Ta mednarodni standard se uporablja za jeklenke, ki imajo odprtino na obeh koncih.

General Information

Status
Withdrawn
Publication Date
30-May-2015
Withdrawal Date
30-Aug-2015
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
04-Feb-2015
Completion Date
04-Feb-2015

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SLOVENSKI STANDARD
SIST EN ISO 11120:2015
01-maj-2015
1DGRPHãþD
SIST EN ISO 11120:2000
SIST EN ISO 11120:2000/A1:2013
Plinske jeklenke - Ponovno polnljive velike jeklenke iz celega iz jekla z vodno
prostornino od 150 do 3000 l - Konstruiranje, izdelava in preskušanje (ISO
11120:2015)

Gas cylinders - Refillable seamless steel tubes of water capacity between 150 l and 3000

l - Design, construction and testing (ISO 11120:2015)
Gasflaschen - Wiederbefüllbare nahtlose Großflaschen aus Stahl mit einem
Fassungsraum zwischen 150 l und 3 000 l - Ausführung, Bau und Prüfung (ISO
11120:2015)

Bouteilles à gaz - Tubes en acier sans soudure rechargeables d'une contenance en eau

de 150 l à 3000 l - Conception, construction et essais (ISO 11120:2015)
Ta slovenski standard je istoveten z: EN ISO 11120:2015
ICS:
23.020.30 7ODþQHSRVRGHSOLQVNH Pressure vessels, gas
MHNOHQNH cylinders
SIST EN ISO 11120:2015 en

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

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SIST EN ISO 11120:2015
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SIST EN ISO 11120:2015
EUROPEAN STANDARD
EN ISO 11120
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 23.020.30 Supersedes EN ISO 11120:1999
English Version
Gas cylinders - Refillable seamless steel tubes of water capacity
between 150 l and 3000 l - Design, construction and testing (ISO
11120:2015)

Bouteilles à gaz - Tubes en acier sans soudure Gasflaschen - Wiederbefüllbare nahtlose Großflaschen aus

rechargeables d'une contenance en eau de 150 l à 3000 l - Stahl mit einem Fassungsraum zwischen 150 l und 3 000 l -

Conception, construction et essais (ISO 11120:2015) Auslegung, Bau und Prüfung (ISO 11120:2015)

This European Standard was approved by CEN on 4 October 2014.

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-CENELEC 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-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11120:2015 E

worldwide for CEN national Members.
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SIST EN ISO 11120:2015
EN ISO 11120:2015 (E)
Contents Page

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

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SIST EN ISO 11120:2015
EN ISO 11120:2015 (E)
Foreword

This document (EN ISO 11120:2015) 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 August 2015, and conflicting national standards shall be withdrawn at

the latest by August 2015.

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 ISO 11120:1999.

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

European Free Trade Association.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

Endorsement notice

The text of ISO 11120:2015 has been approved by CEN as EN ISO 11120:2015 without any modification.

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SIST EN ISO 11120:2015
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SIST EN ISO 11120:2015
INTERNATIONAL ISO
STANDARD 11120
Second edition
2015-02-01
Gas cylinders — Refillable seamless
steel tubes of water capacity
between 150 l and 3000 l — Design,
construction and testing
Bouteilles à gaz — Tubes en acier sans soudure rechargeables d’une
contenance en eau de 150 l à 3000 l — Conception, construction et essais
Reference number
ISO 11120:2015(E)
ISO 2015
---------------------- Page: 7 ----------------------
SIST EN ISO 11120:2015
ISO 11120:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved
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SIST EN ISO 11120:2015
ISO 11120:2015(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

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

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

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Symbols .......................................................................................................................................................................................................................... 2

5 Inspection and testing .................................................................................................................................................................................... 3

6 Materials ....................................................................................................................................................................................................................... 3

6.1 General requirements ....................................................................................................................................................................... 3

6.2 Controls on chemical composition ........................................................................................................................................ 4

6.3 Heat treatment ........................................................................................................................................................................................ 5

6.4 Mechanical properties ...................................................................................................................................................................... 5

6.5 Failure to meet test requirements .......................................................................................................................................... 5

7 Design .............................................................................................................................................................................................................................. 6

7.1 Calculation of cylindrical shell thickness ......................................................................................................................... 6

7.2 Design of tube ends ............................................................................................................................................................................. 6

7.3 Design drawing ....................................................................................................................................................................................... 7

8 Construction and workmanship ........................................................................................................................................................... 7

8.1 General ........................................................................................................................................................................................................... 7

8.2 Surface imperfections ....................................................................................................................................................................... 7

8.3 Ultrasonic examination .................................................................................................................................................................... 7

8.4 End closure (fitting) ........................................................................................................................................................................... 7

8.5 Dimensional tolerances ................................................................................................................................................................... 7

8.5.1 Out-of-roundness ............................................................................................................................................................ 7

8.5.2 Outside diameter ............................................................................................................................................................. 7

8.5.3 Straightness .......................................................................................................................................................................... 8

8.5.4 Eccentricity ........................................................................................................................................................................... 8

8.5.5 Length........................................................................................................................................................................................ 8

8.5.6 Water capacity ................................................................................................................................................................... 8

8.5.7 Mass ............................................................................................................................................................................................ 8

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

9.1 General requirements ....................................................................................................................................................................... 9

9.2 Prototype tests ........................................................................................................................................................................................ 9

9.3 Type approval test report ...........................................................................................................................................................10

9.4 Type approval certificate.............................................................................................................................................................10

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

10.1 General requirements ....................................................................................................................................................................10

10.2 Mechanical tests ..................................................................................................................................................................................10

10.2.1 General requirements ...............................................................................................................................................10

10.2.2 Tensile test .........................................................................................................................................................................11

10.2.3 Impact testing ..................................................................................................................................................................11

10.3 Interpretation of results ..............................................................................................................................................................11

11 Tests on every tube..........................................................................................................................................................................................11

11.1 General ........................................................................................................................................................................................................11

11.2 Hydraulic test ........................................................................................................................................................................................12

11.2.1 Proof pressure test ......................................................................................................................................................12

11.2.2 Volumetric expansion test ....................................................................................................................................12

11.3 Hardness testing .................................................................................................................................................................................12

11.4 Visual inspection ................................................................................................................................................................................13

© ISO 2015 – All rights reserved iii
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SIST EN ISO 11120:2015
ISO 11120:2015(E)

11.5 Dimensional inspection ................................................................................................................................................................13

11.5.1 Thickness .............................................................................................................................................................................13

11.5.2 Diameter and length ..................................................................................................................................................13

11.5.3 Water capacity and mass .......................................................................................................................................13

11.5.4 Neck threads and openings .................................................................................................................................13

11.6 Ultrasonic non-destructive test .............................................................................................................................................13

12 Special requirements for tubes for embrittling gases ................................................................................................14

12.1 General ........................................................................................................................................................................................................14

12.2 Materials ....................................................................................................................................................................................................14

12.3 Design ..........................................................................................................................................................................................................14

12.4 Construction and workmanship ...........................................................................................................................................14

12.4.1 General...................................................................................................................................................................................14

12.4.2 Surface imperfections ...............................................................................................................................................14

12.5 Mechanical tests ..................................................................................................................................................................................15

12.5.1 Tensile and impact tests .........................................................................................................................................15

12.5.2 Hardness test ...................................................................................................................................................................15

13 Inspection certificate ....................................................................................................................................................................................15

14 Marking .......................................................................................................................................................................................................................16

Annex A (informative) Typical chemistry groupings for seamless steel tubes .....................................................17

Annex B (normative) Ultrasonic examination .........................................................................................................................................18

Annex C (informative) Description and evaluation of manufacturing imperfections
and conditions for rejection of seamless steel tubes at time of final inspection

by the manufacturer ......................................................................................................................................................................................23

Annex D (informative) Acceptance certificate .........................................................................................................................................29

Annex E (informative) Type approval certificate ..................................................................................................................................31

Annex F (informative) Bend stress calculation .......................................................................................................................................32

Bibliography .............................................................................................................................................................................................................................33

iv © ISO 2015 – All rights reserved
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SIST EN ISO 11120:2015
ISO 11120:2015(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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. Details of any

patent rights identified during the development of the document will be in the Introduction and/or on

the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers

to Trade (TBT), see the following URL: Foreword — Supplementary information.

The committee responsible for this document is ISO/TC 58, Gas cylinders, Subcommittee SC 3, Cylinder design.

This second edition cancels and replaces the first edition (ISO 11120:1999), which has been technically

revised by the following:
— Annex A “Typical chemistry groupings for seamless steel tubes” is informative;

— nickel chromium molydbenum steel has been added in 6.1.1 and Annex A as Group V;

— reduction of maximum sulfur content in 6.2.2 from 0,020 % to 0,010 %; also the sum of sulfur and

phosphorus is reduced from 0,030 % to 0,025 %;

— the modification of ultrasonic provisions for ultrasonic examination in 8.3 to include ultrasonic

examination for wall thickness and for imperfections also on the supplied tubing;

— “Type Approval Procedure” has been introduced in Clause 9;
— the provisions for design of tubes for embrittling gases have been revised.
It also incorporates ISO 11120:1999/Amd 1:2013.
© ISO 2015 – All rights reserved v
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SIST EN ISO 11120:2015
ISO 11120:2015(E)
Introduction

This International Standard provides a specification for the design, manufacture, inspection and testing

of tubes at the time of manufacture for worldwide usage. The objective is to balance design and economic

efficiency against international acceptance and universal utility.

This International Standard aims to eliminate concern about climate, duplicate inspections and

restrictions currently existing because of lack of definitive International Standards. It does not reflect

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

This International Standard addresses the general requirements on design, construction and initial

inspection and testing 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 it is suitable for use with the

conformity assessment system for UN pressure receptacles of the above-mentioned Model Regulations.

vi © ISO 2015 – All rights reserved
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SIST EN ISO 11120:2015
INTERNATIONAL STANDARD ISO 11120:2015(E)
Gas cylinders — Refillable seamless steel tubes of
water capacity between 150 l and 3000 l — Design,
construction and testing
1 Scope

This International Standard specifies minimum requirements for the material, design, construction and

workmanship, manufacturing processes, examinations and tests at manufacture of refillable quenched

and tempered seamless steel tubes of water capacities exceeding 150 l up to and including 3 000 l

for compressed and liquefied gases exposed to extreme world-wide ambient temperatures, normally

between –50 °C and +65 °C.

This International Standard is applicable to tubes with a maximum tensile strength, R , of less than

1 100 MPa. These tubes can be used alone or in batteries to equip trailers or multiple element gas

containers (ISO modules or skids) for the transportation and distribution of compressed gases.

This International Standard is applicable to tubes having an opening at each end.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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 148-2, Metallic materials — Charpy pendulum impact test — Part 2: Verification of testing machines

ISO 148-3, Metallic materials — Charpy pendulum impact test — Part 3: Preparation and characterization

of Charpy V-notch test pieces for indirect verification of pendulum impact machines

ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel

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

ISO 6506-2, Metallic materials — Brinell hardness test — Part 2: Verification and calibration of testing machines

ISO 6506-3, Metallic materials — Brinell hardness test — Part 3: Calibration of reference blocks

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

ISO 11114-1, Gas cylinders — Compatibility of cylinder and valve materials with gas contents — Part 1:

Metallic materials

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

ISO 13769, Gas cylinders — Stamp marking
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
© ISO 2015 – All rights reserved 1
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SIST EN ISO 11120:2015
ISO 11120:2015(E)
3.1
yield strength

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

yield, the 0,2 % proof strength (non-proportional extension), R
p0,2
Note 1 to entry: See ISO 6892-1.
3.2
quenching

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

upper critical point, Ac , of the steel, is cooled rapidly in a suitable medium
3.3
tempering

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

below the lower critical point, Ac , of the steel
3.4
tube

seamless transportable pressure receptacle of a water capacity exceeding 150 l but not more than 3 000 l

3.5
batch

quantity of up to 30 tubes of the same nominal diameter, thickness and design made successively from the

same steel cast and processed in the same heat treatment equipment (i.e. a continuous furnace process or a

single furnace charge, for both austenitization and tempering) using the same heat treatment parameters

3.6
test pressure
required pressure applied during a pressure test
Note 1 to entry: It is used for tube wall thickness calculation.
3.7
design stress factor

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

h eg
3.8
laminar imperfection

any imperfection lying essentially parallel to the tube surface, within the thickness of the product

3.9
working pressure

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

4 Symbols
a Calculated minimum thickness, in millimetres, of the cylindrical shell
...

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