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Due to the new gas letter code specified in ISO 10225, ISO 5172 needed to be amended accordingly. The responsible German standardization committee is Working Committee NA 092-00-07 AA "Ausrüstung zum Gasschweißen, Schneiden und verwandte Prozesse" ("Equipment for gas welding, cutting and allied processes") at NAS.
This document replaces DIN EN ISO 2503:2009-11 .