Draft Document - Explosive atmospheres - Part 7: Equipment protection by increased safety "e" (IEC 31/1301/CDV:2017); German version EN 60079-7:2015/prA1:2017
Electrical apparatus for the detection and measurement of flammable gases - Part 2: Performance requirements for group I apparatus indicating a volume fraction up to 5 % methane in air (IEC 61779-2:1998, modified); German version EN 61779-2:2000
Draft Document - Explosive Atmospheres - Part 20-1 Material characteristics - Gas and vapour classification, test methods and data (IEC 31/740/CD:2007)