Räls och rälsdelar

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: ISO
Svarsdatum: den 14 aug 2020
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This part of ISO 12856 specifies general requirements of polymeric composite railway sleepers. It is applicable to the sleepers, bearers and transoms to be installed in all tracks (both heavy and urban rail) with or without ballast.

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: ISO
Svarsdatum: den 19 aug 2020
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This part of ISO 12856 specifies the characteristics of polymeric composite and reinforced polymeric composite materials in the manufacture of polymeric composite railway sleepers. It is applicable to the sleepers, bearers and transoms to be installed in all tracks (both heavy and urban rail) with or without ballast.

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: ISO
Svarsdatum: den 8 sep 2020
Se merSe mindre
 

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.