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ISO 9809-4:2026

Gas cylinders — Design, construction and testing of refillable seamless steel gas cylinders and tubes — Part 4: Stainless steel cylinders with an R m value of less than 1 100 MPa

Publication date:   Feb 23, 2026

General information

60.60   Standard published   Feb 23, 2026

ISO

ISO/TC 58/SC 3 Cylinder design

International Standard

23.020.35   Gas cylinders

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Scope

This document specifies the minimum requirements for the materials, design, construction and workmanship, manufacturing processes, examinations and testing at time of manufacture for refillable, seamless, stainless steel gas cylinders with water capacities up to and including 150 l.
It is applicable to cylinders for compressed, liquefied and dissolved gases with a maximum actual tensile strength, Rma, of less than 1 100 MPa.
NOTE            If so desired, cylinders of water capacity between 150 l and 450 l can be manufactured to be in full conformance to this document.

Life cycle

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ISO 9809-4:2021

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PUBLISHED
ISO 9809-4:2026
60.60 Standard published
Feb 23, 2026