Explosive atmospheres - Part 12: Classification of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting current
1 Scope
This Part specifies the basis for the classification of the combustible gases and vapours for industrial product, storage and use (hereafter referred as “gases and vapours”). Guidance is given on the tests to be carried out to classify any additional gases or vapours not listed in Appendix A of this Part.
This Part provides guidance on the selection of the appropriate group or sub-group of electrical apparatus, protected by flameproof enclosure “d” or designed to be intrinsically safe “i”, according to the gas or vapour in which it is intended to be used.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
