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Standard
ISO 21013-1
Second edition
Cryogenic vessels — Pressure-relief
2021-12
accessories for cryogenic service —
AMENDMENT 1
Part 1:
2024-05
Reclosable pressure-relief valves
AMENDMENT 1
Récipients cryogéniques — Dispositifs de sécurité pour le service
cryogénique —
Partie 1: Soupapes de sûreté pour service cryogénique
AMENDEMENT 1
Reference number
ISO 21013-1:2021/Amd.1:2024(en) © ISO 2024
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ISO 21013-1:2021/Amd.1:2024(en)
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© ISO 2024 – All rights reserved
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ISO 21013-1:2021/Amd.1:2024(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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This document was prepared by Technical Committee ISO/TC 220, Cryogenic vessels.
A list of all parts in the ISO 21013 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
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© ISO 2024 – All rights reserved
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ISO 21013-1:2021/Amd.1:2024(en)
Cryogenic vessels — Pressure-relief accessories for cryogenic
service —
Part 1:
Reclosable pressure-relief valves
AMENDMENT 1
4.3.1
Replace the first two sentences in the first paragraph with the following:
Materials shall be either
— in conformance with an internationally recognized standard (see Annex A), or
— in conformance with this subclause.
Materials shall be compatible with the process fluid. Materials and combination of materials shall be
selected such that galling, frictional heating, and galvanic corrosion are avoided.
Replace the first sentence in the second paragraph with the following:
For materials that are not in conformance with an internationally recognized standard (see Annex A), the
materials shall be controlled by the manufacturer of the pressure-relief valve by a specification ensuring
control of chemical content and physical properties and quality at least equivalent to an internationally
recognized standard.
Annex
Add the following new Annex A:
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ISO 21013-1:2021/Amd.1:2024(en)
Annex A
...