ISO 11621
Gas cylinders ? Procedures for change of gas service


This International Standard applies to seamless steel, aluminium alloy and welded steel refillable cylinders of all
sizes, including large cylinders (water capacity greater than 150 I).
It provides general requirements and procedures to be considered whenever a cylinder is being transferred from
one gas service to another for permanent and liquefied gases.
It does not apply to cylinders for dissolved acetylene, radioactive gases or gases listed in group G of table I.

General Information

ISO 11621ADOPTED ISO STANDARDSFluid systems and components for general use21First Edition
Feb 2021
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