ISO 4706:2023

Gas cylinders — Refillable welded steel cylinders — Test pressure 60 bar and below

This document specifies the minimum requirements concerning material selection, design, construction and workmanship, procedure, and test at manufacture of refillable welded-steel gas cylinders of water capacities from 0,5 l up to and including 150 l and drums of water capacities of 150 l to 500 l of a test pressure not greater than 60 bar[1], exposed to extreme worldwide temperatures (−50 °C to +65 °C) used for compressed, liquefied or dissolved gases. NOTE Unless specified in the text, for the purpose of this document, the word “cylinder” includes “pressure drums”. This document is primarily intended to be used for industrial gases other than liquefied petroleum gas (LPG), and is also applicable to LPG. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.

Bouteilles à gaz — Bouteilles en acier soudées rechargeables — Pression d'essai de 60 bar et moins

General Information

• Status: Published
• Publication Date: 19-Sep-2023
• ICS: 23.020.35 - Gas cylinders
• Technical Committee: ISO/TC 58/SC 3 - Cylinder design
• Drafting Committee: ISO/TC 58/SC 3/WG 21 - Refillable welded steel gas cylinders
• Current Stage: 6060 - International Standard published
• Start Date: 20-Sep-2023
• Due Date: 07-Oct-2023
• Completion Date: 20-Sep-2023

Relations

• Revises: ISO 4706:2008 - Gas cylinders — Refillable welded steel cylinders — Test pressure 60 bar and below
• Effective Date: 23-Apr-2020

Standards Content (Sample)

ISO/FDISPRF 4706:2023
Date: February 28, 2023
ISO/TC 58/SC 3/WG 21
Secretariat: BSI
Date: 2023-07-21
Gas cylinders — Refillable welded steel cylinders — Test pressure
60 bar and below
Bouteilles à gaz — Bouteilles en acier soudées rechargeables — Pression d'essai de 60 bar et moins
FDIS stage

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ISO/FDISPRF 4706:2023 (E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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'sISO’s member body in the country of the requester.
ISO Copyright Officecopyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]
E-mail: [e-mail]
Website: www.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDISPRF 4706:2023 (E)
Contents
Foreword .vi i
Introduction . ix
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
3.1 Terms and definitions . 2
3.2 Symbols . 3
4 Inspection and testing . 4
5 Materials . 5
5.1 General . 5
5.2 Chemical composition . 5
6 Design . 6
6.1 General requirements . 6
6.2 Valve protection . 7
6.3 Design of openings . 7
7 Calculation of minimum wall thickness (sidewall and ends) . 7
7.1 Sidewall thickness . 7
7.2 Design of ends concave to pressure . 8
8 Construction and workmanship . 15
8.1 Welding qualification . 15
8.1.1 General .
...

INTERNATIONAL ISO
STANDARD 4706
Third edition
Gas cylinders — Refillable welded
steel cylinders — Test pressure 60 bar
and below
Bouteilles à gaz — Bouteilles en acier soudées rechargeables —
Pression d'essai de 60 bar et moins
PROOF/ÉPREUVE
Reference number
ISO 4706:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 4706:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
PROOF/ÉPREUVE © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 4706:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
3.1 Terms and definitions . 2
3.2 Symbols . 3
4 Inspection and testing .4
5 Materials . 4
5.1 General . 4
5.2 Chemical composition . 5
6 Design . 5
6.1 General requirements . 5
6.2 Valve protection . 6
6.3 Design of openings . 6
7 Calculation of minimum wall thickness (sidewall and ends) . 6
7.1 Sidewall thickness . 6
7.2 Design of ends concave to pressure . 7
8 Construction and workmanship .
...