ISO IECEx 80079-41 "Reciprocating Internal Combustion Engines used in Explosive Atmospheres"
Standard handled by the IEC TC31 / SC31M commission
This standard deals with internal combustion engines (mainly diesel and gas engines) without any limitation of size or power that can be found, even accidentally, in an explosive atmosphere.
They are stationary engines or engines mounted on mobile machines.
The aim is to equip these engines to prevent them from igniting the explosive atmosphere that may be in the vicinity. Revision of this standard is related to the BP Deep Water Horizon platform accident in the Gulf of Mexico.
Alain Bucher is in charge of the TG4 which deals with the definition and qualification of flame arresters to be installed at the intake and exhaust of these engines. Specific problems related to the nature of the gases, the intake pressure and the exhaust temperature require special attention from this equipment.
In addition, the ISO 16 852 standard on flame arresters excludes these applications for engines, hence the need for this standard to adopt this technology.
Alain Bucher is also present on the TG6 for the use of gas analysers for engine safety and in the TG5 for the risk study related to the use of engines in explosive atmospheres.