DIN EN 13463-5:2011

Non-electrical equipment intended for use in potentially explosive atmospheres - Part 5: Protection by constructional safety 'c'; German version EN 13463-5:2011 (Foreign Standard)

This European standard specifies the requirements for the design and construction of non-electrical equipment, intended for use in potentially explosive atmospheres, protected by the type of protection Constructional Safety "c". This standard supplements the requirements in EN 13463-1, the contents of which also apply in full to equipment constructed in accordance with this standard. The type of ignition protection described in the standard can be used either on its own or in combination with other types of ignition protection to meet the requirements for equipment of Group I, category M2 or Group II, categories 1 and 2 depending on the ignition hazard assessment in EN 13463-1. Type of ignition protection "c" is not applicable for Group I forM1. These requirements are specified in EN 50303. NOTE Most category 3 equipment, only needs to meet the requirements of EN 13463-1, but some category 3 equipment may have to meet the requirements of this standard for some of the ignition sources identified in the ignition hazard assessment.*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 explosionsfΣhigen AtmosphΣren" ("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.