Railway applications. Track. Flash butt welding of rails - New R220, R260, R260Mn and R350HT grade rails by mobile welding machines at sites other than a fixed plant1 Scope This European Standard specifies requirements for the approval of a welding process by a MFBW machine at sites other than fixed plant, as well as the welding contractor together with the requirements for subsequent welding production. Where a MFBW machine is to be used in a static but temporary situation, the requirements of this part of the standard shall apply. It applies to new Vignole R220, R260, R260Mn and R350HT grade rails of 46 kg m

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