Confined space is identified as any area which limited means of access / egress and the area is subjected to :
Oxygen deficiency.
Accumulation of flammable vapors.
Any airborne contaminates that exceeds established permissible exposure limited(PEL)vapor air mixture will ignite & burn only with in a specified range of composition which will be above LEI & above UEL.
The lower flammability limit or lower explosive limit is the minimum volume percent of the fuel that will support combustion below the LEL.The mixture with air is too lean.
Upper flammability limit is the maximum volume of percent fuel that will support combustion & the upper explosion limit is the maximum volume percentage of fuel that will support an explosion.Above the UEL and / UFL,the mixture with air is too rich.Examples : Tanks.vessels,pipe ,duct,inlet basins,utility vault,collection basins,sludge pits,trench,boiler and tube areas ,Silo.
Oxygen deficiency.
Accumulation of flammable vapors.
Any airborne contaminates that exceeds established permissible exposure limited(PEL)vapor air mixture will ignite & burn only with in a specified range of composition which will be above LEI & above UEL.
The lower flammability limit or lower explosive limit is the minimum volume percent of the fuel that will support combustion below the LEL.The mixture with air is too lean.
Upper flammability limit is the maximum volume of percent fuel that will support combustion & the upper explosion limit is the maximum volume percentage of fuel that will support an explosion.Above the UEL and / UFL,the mixture with air is too rich.Examples : Tanks.vessels,pipe ,duct,inlet basins,utility vault,collection basins,sludge pits,trench,boiler and tube areas ,Silo.
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