DS DS/EN ISO 3821
DS DSEN SO 3821 2010-MAY-15 Gas weldng equpment - Rubber hoses for weldng cuttng and alled processes
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This Standard specifies requirements for rubber hoses, including twin hoses and fluxed fuel gas hoses for welding, cutting and allied processes. The term "allied processes" means, in particular, heating, brazing and metallization.