Welding Fabrication Standards - EWF

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Welding Fabrication Standards Page 82 9 Project European standards for the fabrication of railway vehicles and components 9.1 Introduction As already stated in other Chapters of this book, over the last few years, standardisation at international level has become more and more “product-oriented”, considering not only the technical requirements of the product itself, but also specific requirements to be fulfilled by the Manufacturer, in its fabrication process. Figure 26 – Manufacturing of a boogie for railway application Istituto Italiano della Saldatura Lungobisagno Istria, 15 - 16141 Genova (I) - Tel. 01083411 - Fax 0108367780
Welding Fabrication Standards Page 83 Therefore CEN TC 256 WG 31 has started working on the development of a new European standard for design, fabrication and maintenance of railway vehicles and components, which has been developed as prEN 15085 in 2005 13 . This document has been produced considering the commonly agreed best practice fabrication criteria, as the main Customers (the national railway Companies) and Manufacturers were strongly represented in this standardisation phase. The standard will be composed by several parts, as follows: - prEN15085 – 1: general guidelines and definitions; - prEN15085 – 2: requirements for the Manufacturer; - prEN15085 – 3: design requirements; - prEN15085 – 4: production requirements; - prEN15085 – 5: the guidelines of inspection, testing and documentation. In the next paragraph only the requirements for the welding Manufacturer (as relates to part 2) will be described. 9.2 prEN 15085-2 Requirements for the Manufacturer Differently from other standards, this standard requires that the Manufacturer complies with specific technical requirements, in order to demonstrate its capability to fabricate railway vehicles and components. Such a capability must be evaluated and assessed by an authorised body (“recognition of a welding Manufacturer”). The standards defines different Manufacturer certification levels, taking into consideration the type of product manufactured and the “safety relevance”, intended as complexity of the design and the consequence of failure. Precise criteria for the definition of the safety relevance are still under discussion. Next table shortly summarizes the criteria for the identification of those levels. Level Definition New build, conversion and repair of rail vehicles and relevant components with high safety 1 relevance 2 New production of parts of railway vehicles with medium safety relevance 3 New production of parts of railway vehicles with low safety relevance 4 Design and/or assembly of railway vehicles and relevant components with High, medium or low safety relevance, when welding activities are sub-contracted and not performed. Table 23 – Identification of the level of the Manufacturer of railway vehicles and components 13 Because of the early stage of development of this standard, some of the information contained can be subject to changes in the future. However the general approach to the standard should not be changed in the future. Istituto Italiano della Saldatura Lungobisagno Istria, 15 - 16141 Genova (I) - Tel. 01083411 - Fax 0108367780
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Welding Fabrication Standards - EWF

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