Electrical apparatus for potentially explosive atmospheres. General requirementsElectrical apparatus for potentially explosive atmospheres General requirements Executive summary General requirements for the construction, testing and marking of electrical apparatus. Abstract This European Standard specifies the general requirements for the construction, testing and marking of: electrical apparatus; ex cable entries; and ex components intended for use in potentially explosive atmospheres of gas, vapour and mist. Potentially

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This standard specifies requirements for constructions and performance of wet alarm valve assemblies and retard chambers used in automatic sprinkler systems

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This European Standard describes a method for the ultrasonic testing of uncoated flat steel product for internal discontinuities