1970EN 60079-18:2015+A1:2017 "Explosive atmospheres - Part 2: Equipment protection by pressurized enclosure ""p"""
2015EN 60079-18:2015 Explosive atmospheres �C Part 18: Equipment protection by encapsulation ��m�� (Incorporates Amendment A1: 2017)
2009EN 60079-18:2009 "Explosive atmospheres - Part 18: Equipment protection by encapsulation ""m"""
2004EN 60079-18:2004 "Electrical apparatus for explosive gas atmospheres Part 18: Construction@ test and marking of type of protection encapsulation ""m"" electrical apparatus"