This International Standard specifies the letter code of gases to be used for marking equipment for gas welding, cutting and related techniques, when the full name of the gas cannot be used.
NF A84-531:2014 history
2021NF A84-531*NF EN ISO 10225:2021 Gas welding equipment - Marking for equipment used for gas welding, cutting and allied processes
2014NF A84-531:2014 Gas welding equipment - Marking for equipment used for gas welding, cutting and allied processes