ISO 22074-6:2021 pdf download – Railway infrastructure — Rail fastening systems — Part 6: Test method for resistance to severe environmental conditions.
1 Scope This document specifies a laboratory test procedure for finding the effect of exposure to severe environmental conditions on the fastening system. This test procedure applies to a complete fastening assembly including embedded rail with mechanical fastenings. It is not applicable to embedded rail systems relying on adhesive components to secure the rail. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 22074-1, Railway infrastructure — Rail fastening systems — Part 1: Vocabulary ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests 3? Terms? and? definitions For the purposes of this document, the terms and definitions given in ISO 22074-1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https:// www .iso .org/ obp — IEC Electropedia: available at http:// www .electropedia .org/ 4 Principle The complete fastening assembly is exposed to a salt spray and the effect on ease of dismantling, and reassembly, and condition of individual components is recorded. 5 Apparatus 5.1 Salt spray equipment, which shall conform with ISO 9227 for the NSS (neutral salt spray) test. 5.2 Tools, manually operated, normally used for installing and removing the clamping device from the fastening assembly.
6 Test specimens Each specimen shall consist of a complete fastening assembly with a section of sleeper, bearer or element of ballastless track. This shall include a short length of rail of the section for which the fastening is designed. 7 Procedure Visually examine and record the condition of each component. Then fit the rail to the section of sleeper or baseplate using the fastening components as they are to be assembled in track. Subject to the neutral salt spray in accordance with ISO 9227 for 300 h. Remove the clamping device using the tools provided; visually examine all the components and record their condition. Then reassemble the fastening system using the tools provided. Record any failure to dismantle or reassemble the fastening with the tools provided. 8 Test report The test report shall include at least the following information: a) a reference to this document (i.e. ISO 22074-6:2021); b) name and address of laboratory performing the test; c) date when the test was performed; d) name, designation and description of fastening assembly, including individual components, tested; e) origin of test specimens; f) support used for assembly; g) rail section used in test; h) tools provided to assemble and dismantle the assembly; i) change in appearance (if any) of each component during test; j) any failure to dismantle or reassemble the fastening assembly with the tools provided.