Typical Overall Heat Transfer Coefficients

Refining Applications

Alkylatio
Range, (Btu/h.ft².°F)
 
Debutanizer Condenser7590
Debutanizer Reboiler (STM)85100
Deisobutanizer Feed Preheater (STM)75100
Deisobutanizer Condenser8090
Deisobutanizer Reboiler (STM)90100
Depropanizer Feed Preheater (STM)90100
Depropanizer Condenser90100
Depropanizer Reboiler (STM)7595
Depropanizer Feed/Btms Exchanger6080
Olefin Feed Chiller7080
Refrigeration Condenser90100
Rerun Tower Preheater (STM)6080
Rerun Tower Condenser6580
Rerun Tower Reboiler (STM)80100
Rerun Tower Bottoms Cooler5070
Amine Treating
 Range, (Btu/h.ft².°F)
 
Rich/Lean Amine Exchanger7590
Regenerator Condenser7090
Regenerator Reboiler (STM)100120
Lean Amine Cooler8090
Catalytic Cracking
Range, (Btu/h.ft².°F)
 
Naphtha Cooler5565
Feed / DFO3545
DFO Cooler4555
DFO Cooler (300-400 °F)80100
Gas Oil / DFO4050
Gas Oil / Quench3550
Gas Oil / Tar3040
Quench or STB / Feed3545
Quench / BFW6080
Quench or STB Cooler3050
Quench and/or STB Cooler (300-400 °F)5070
Quench Steam Gen.7090
Reduced Crude / Quench3545
Reduced Crude / Tar Sep. Btms.3040
SYN Tower Condenser3040
Crude Distillation
Range, (Btu/h.ft².°F)
 
Crude / Heavy Gas Oil4050
Crude / Kerosene3545
Crude / Light Gas Oil4050
Crude / Naphtha4050
Crude / Reduced Crude2535
Crude / Vac. Tar2530
Heavy Gas Oil Cooler5050
Heavy Gas Oil Steam Gen.100120
Kerosene Cooler5565
Light Gas Oil Cooler4555
Lube Dist. / Crude4050
Naphtha Cooler6070
Reduced Crude / Gas Oil3545
Reduced Crude / Naphtha4050
Reduced Crude Cooler2030
Tower Overhead / Crude3040
Tower Condenser4555
Vac. Tar / Steam Gen.4555
Vac. Tar Cooler (box)1020
Hydrodesulfurization
Range, (Btu/h.ft².°F)
 
Charge / Reactor Effluent6070
Charge / Gas Oil Product5565
Charge / HTS Off Gas5060
HTS Off Gas / Water Condenser7585
Stripper Feed / Gas Oil Product5565
Stripper Bottoms Cooler6575
Stripper Condenser5565
Total Gas / Gas Oil Product5565
Light Ends Processing
 Range, (Btu/h.ft².°F)
 
Absorber Intercooler6070
Compressor Contactor Cooler7590
Deethanizer Condenser80100
Deethanizer Reboiler80100
Debutanizer Feed / Btms6070
Debutanizer Feed Preheater (STM)80100
Debutanizer Condenser7590
Debutanizer Condenser Aftercooler4050
Debutanizer Reboiler (STM)80100
Depropanizer Feed / Btms7090
Depropanizer Condenser90100
Depropanizer Reboiler (Hot Oil)5565
Depropanizer Reboiler (STM)80100
Fractionating Abs. Reboiler7590
Gasoline Cooler7080
Lean Oil / Rich Oil Exchanger4555
Lean Oil Cooler6070
Propane and/or Butane Cooler7585
Stabilizer Btms. / Feed6575
Stabilizer Condenser7090
Stabilizer Reboiler75100
Lube & Wax Processing
 
ExtractionRange, (Btu/h.ft².°F)
 
Solvent Vapor / Extract Mix (75% Solvent) 225
Treating Tower Intercooler60100
Solvent / Charge Oil2040
Solvent Water Cooler 90
Raffinate Oil / Raffinate Oil Mix2060
Raffinate Oil / Water Cooler2560
Solvent / Raffinate Oil Mix 30
Raffinate Oil Mix / Steam 35
Raffinate Oil Mix / Steam Evaporator (80% Solvent) 90
Raffinate Oil Mix / Steam Evaporator (45% Solvent) 70
Raffinate Oil Mix / Steam Evaporator (13% Solvent) 40
Atmospheric Solvent Vapors / Extract Mix 60
Extract / Water Cooler (Submerged Coil)1015
Dry Solvent Vapor (Vacuum) / Water Condenser (+Subcooling) 60
CBM / Water Condenser (Subcooling to 150°F) 120
Vacuum Pump Aftercooler 10
Steam / Steam Superheater 15
Extract Mix / Steam Evaporator (80% Solvent) 90
Extract Mix / Steam Evaporator (45% Solvent) 70
Extract Mix / Steam Evaporator (13% Solv ent) 40
Extract Mix / Solvent Vapor (80% Solvent)90115
Extract Mix / Solvent Vapor (45% Solvent) 55
Extract Mix / Solvent Vapor (13% Solvent) 35
Wet Solvent Vapor (Vacuum) / Water Condenser (+Subcooling) 105
Extract Mix (10% Solvent) / Extract Mix (80% Solvent) 15
 
Dewaxing
 
Cold Pressed Oil Mix / Solvent 30
Cold Slack Wax Mix / Steam 45
Flue Gas / Ammonia Chiller610
Flue Gas / Water Cooler1020
Hot Solvent / Wax Oil 65
Pressed Oil / Pressed Oil Mix3040
Pressed Oil / Water Cooler (to 150°F) 25
Slack Wax / Slack Wax Mix 30
Solvent / Ammonia Chiller 60
Solvent / Cold Slack Wax Mix 10
Solvent / Water Cooler (5# delta P) 90
Solvent / Water Cooler (1# delta P) 70
Solvent Vapor / Pressed Oil Mix45100
Solvent Vapor / Slack Wax Mix 65
Solvent Vapor / Pressed Oil 80
Solvent Vapor / Pressed Oil 90
Solvent Vapor / Slack Wax Mix (3:1 Solvent Ratio) 80
Solvent Vapor / Slack Wax Mix (4:1 Solvent Ratio) 90
Solvent Vapor / Water Condenser (No Subcooling) 100
Steam / Steam Superheater 15
Steam / Pressed Oil (2:1 Solvent Ratio)1570
Steam / Pressed Oil (3:1 Solvent Ratio)35100
Steam / Pressed Oil (4:1 Solvent Ratio) 125
Steam / Slack Wax Mix (1:2 Solvent Ratio)1570
Steam / Slack Wax Mix (2:1 Solvent Ratio) 60
Steam / Slack Wax Mix (3:1 Solvent Ratio) 70
Steam / Slack Wax Mix (4:1 Solvent Ratio) 125
Warm Wash Heater 100
Wax Oil Mix / Ammonia DP Chiller (with Scrapers) 30
Wax Oil Mix / Ammonia DP Chiller (without Scrapers) 20
Wax Oil Mix / Pressed Oil Mix DP Exchanger1520
Wax Oil Mix / Water Cooler 30
Wet Solvent Vapor Condenser (with Subcooling) 75
Naphtha Hydrotreating & Reforming
Range, (Btu/h.ft².°F)
 
Pretreater Reactor Effluent / Charge (Cold End)6575
Pretreater Reactor Effluent / Charge (Hot End)7080
Pretreater Reactor Effluent Condenser8090
Naphtha Splitter Feed / Botomms6580
Naphtha Splitter Condenser6575
Reactor Effluent Condenser80100
Reactor Effluent / Feed (Cold End)7085
Reactor Effluent / Feed (Hot End)8090
Splitter or Stripper Feed / Pretreater Effluent7585
Stabilizer Reboiler (Hot Oil)7595
Thermal Cracking
Range, (Btu/h.ft².°F)
 
Coker Combination TWR Condenser4050
Gas Oil / Gas Oil3040
G.O. Cracker O’hd Condenser4565
Gas Oil Reflux Steam Gen.8090
Gasoline / Naphtha Charge6080
Thermal Tar Cooler (box)1020
Thermal Tar Steam Gen.4050
Top Reflux / BFW6080
Top Reflux / Naphtha6080
Top Reflux / Naphtha Charge5060
Top Reflux Cooler5565
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