Class 1 means that the location contains flammable gases, flammable liquid-produced vapours, or combustible liquid produced vapours. Division 2 means a location where an explosive atmosphere does not exist under normal operating conditions but, if it does occur, it will persist for a short period only. A Division 2 area might be created during repair or maintenance activities, accidental rupture of a vessel or container or failure of a ventilating system. For more details, visit our website at www.hazcon.com