DIN EN 13463-5:2011-10

Non-electrical equipment has been used for over 150 years in industries having potentially explosive atmospheres and a great deal of experience has been gained in the application of protective measures to reduce the risk of ignition to an acceptably safe level. With the introduction of the ATEX Directive 94/9/EC and the inclusion of non-electrical equipment in its scope, it became necessary to produce ignition protection concept standards which clearly defined these protective measures and incorporated the extensive and diverse experience gained over the years.
One of the methods of applying ignition protection, had been to select types of equipment not containing an ignition source in normal service and then apply good engineering principles, so that risk of mechanical failures likely to create incendive temperatures or sparks, was reduced to a very low level. Such protective measures are referred to in this standard as ignition protection by "Constructional Safety", or type of protection "c". The purpose of this standard is therefore to specify requirements for equipment protected by the type of protection "c" and which meet the essential health and safety requirements described in Directive 94/9/EC. This European Standard has been prepared CEN/TC 305, Working Group 2 "Equipment for use in potentially explosive atmospheres" (secretariat: DIN, Germany). For Germany, Working Committee NA 095-02-02 AA "Betriebsmittel in explosionsfähigen Atmosphären" ("Equipment for use in potentially explosive atmospheres") of the Safety Design Principles Standards Committee (NASG) at DIN, the German Institute for Standardization e. V., has been involved in the revision.