Typical Heat Exchanger Fouling Resistances

Industrial Fluids

(h.ft².°F/Btu)
Gases & VaporsAmmonia Vapor0.001
Chlorine Vapor0.002
CO2 Vapor0.001
Coal Flue Gas0.010
Compressed Air0.001
Engine Exhaust Gas0.010
Manufactured Gas0.010
Natural Gas Flue Gas0.005
Refrigerant Vapors (Oil Bearing)0.002
Steam (Exhaust, Oil Bearing)0.0015-0.002
Steam (Non-Oil Bearing)0.0005

LiquidsAmmonia Liquid0.001
Ammonia Liquid (Oil Bearing)0.003
Calcium Chloride Solutions0.003
Chlorine Liquid0.002
CO2 Liquid0.001
Ethanol Solutions0.002
Ethylene Glycol Solutions0.002
Hydraulic Fluid0.001
Industrial Organic Heat Transfer Media0.002
Methanol Solutions0.002
Molten Heat Transfer Salts0.0005
Refrigerant Liquids0.001
Sodium Chloride Solutions0.003

OilsEngine Lube Oil0.001
Fuel Oil #20.002
Fuel Oil #60.005
Quench Oil0.004
Transformer Oil0.001
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