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AWS A5.32M/A5.32:2021
Welding Consumables - Gases And Gas Mixtures For Fusion Welding And Allied Processes
This standard prescribes the requirements for the classification of gases and gas mixtures used in fusion welding and allied processes to chemically shield filler material, base metal, or weld metal. Classification is based on chemical composition of the more popular single and multi-component gases. Additional requirements are included for purity and moisture of individual gas components, testing, re-testing, packaging, and cylinder or container labeling. An annex is appended to the standard as a source of information concerning the classification system and the intended use of the gases and gas mixtures. This specification makes use of both U.S. Customary Units and the International System of Units (SI). Since these are not equivalent, each system must be used independently of the other.
American Welding Society [aws]