ISO 11513:2019

INTERNATIONAL ISO
STANDARD 11513
Second edition
2019-06
Gas cylinders — Refillable welded
steel cylinders containing materials
for sub-atmospheric gas packaging
(excluding acetylene) — Design,
construction, testing, use and periodic
inspection
Bouteilles à gaz — Bouteilles en acier soudées rechargeables
contenant des matériaux pour le stockage des gaz à une pression
sub-atmosphérique (à l'exclusion de l'acétylène) — Conception,
fabrication, essais, utilisation et contrôle périodique
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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 . 2
4 Inspection and testing . 3
5 Materials and stress relieving . 3
6 Design . 4
6.1 General . 4
6.2 Calculation of cylindrical wall thickness. 5
6.3 Design of cylinder ends. 5
6.3.1 General. 5
6.3.2 Design of base concave to pressure . 5
6.4 Minimum wall thickness . 6
6.5 Pressure relief device . 7
7 Construction and workmanship . 7
7.1 General . 7
7.2 Welding qualification . 7
7.3 Welding seams of pressure containing parts . 8
7.4 Valve protection . 8
7.5 Boss threads . 8
7.6 Visual examination . 8
7.6.1 Imperfections . 8
7.6.2 Welds . 8
7.6.3 Out-of-roundness .11
7.6.4 Straightness .11
7.6.5 Verticality .11
8 Technical requirements for type approval testing (new design tests).11
8.1 General .11
8.2 Verifications and tests .12
8.3 Description of verification tests .12
8.3.1 Hydraulic burst test .12
8.3.2 Pressure cycling test .13
9 Batch tests .13
9.1 General .13
9.2 Information .13
9.3 Checks and verifications .14
9.4 Tensile test .14
9.4.1 General.14
9.4.2 Tensile test samples required from parent material .14
9.4.3 Tensile test samples required from welds .14
9.5 Bend test .16
9.6 Macroscopic examination of weld cross-sections .16
9.7 Radiographic examination of welds.16
10 Tests on every cylinder .17
11 Failure to meet verification and test requirements .17
12 Marking .17
13 Certification .18
Annex A (normative) Inspection at time of fill .19
Annex B (normative) Periodic inspection and testing.21
Bibliography .22
iv © ISO 2019 – All rights reserved

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
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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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).
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www .iso .org/iso/foreword .html.
This document 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 11513:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
— references to packing instruction P200 of the UN Model Regulations have been replaced with
packing instruction P208 as this document is referenced in only P208 of the UN Model Regulations;
— the prohibition on the use of ultrasonic testing during periodic inspection and test has been removed
from Annex B;
— the unit “weight” has been replaced with “mass” to align with ISO 80000.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
Introduction
This document provides a specification for the design, manufacture, use and periodic inspection and
testing of a wel
...