DS EN 1834-1:2001 Reciprocating Internal Combustion Engines - Safety Requirements For Design And Construction Of Engines For Use In Potentially Explosive Atmospheres - Part 1: Group 2 Engines For Use In Flammable Gas And Vapour Atmospheres Defines the safety requirements and/or measures to remove the hazards and limit the risks on reciprocating internal combustion compression ignition engines of group II categories 2 and 3 for use in po