scope:

This document applies to the following rail welding processes: - flash butt; - gas pressure; - aluminothermic; - enclosed arc welding. This document specifies the requirements on approval/homologation of welding processes, contractors/welders/inspectors, and acceptance of welded joints in factory/track. In this document, 43kg/m - 75kg/m new vignole rails of the same profiles and same steel grades are the subject of welding. This document does not specify requirements and evaluation test methods specific to each welding process. These will be prescribed in the subsequent parts of the ISO 23300 series. This document is restricted to butt welding for connecting rail ends. This document does not cover the welding for construction of crossings, railway switches, signal bond installation or restoration of rails. This document does not cover any safety regulations of welding operations. In this document, qualifications of individuals and organisations for rail welding are not specified.