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HEAT TRANSFER OILS

STRAIGHT OR INHIBITED MINERAL OILS

Phillips 66® Heat Transfer Oils are high-quality straight or inhibited mineral oils developed for use in open and/or closed liquid-phase heat transfer systems. They have excellent thermal stability and provide excellent resistance to cracking and sludge formation for long service life. They are not recommended for use in vapor-phase heat transfer systems.

HEAT TRANSFER OILS

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Features & Benefits

  • Excellent resistance to thermal breakdown at high temperatures
  • Excellent performance in both open and closed heat transfer systems
  • Long service life
  • Excellent deposit control
  • Low odor
  • Non-corrosive

Applications

  • Heat Transfer Oils 22, 32, 32/46 and 46 are recommended for use in closed, liquid-phase, forced circulation heat transfer systems equipped with expansion tanks and pressure relief valves, where the maximum bulk oil temperature does not exceed 550oF (288oC). Preventive measures should be taken to minimize oil oxidation by eliminating air from the system prior to bringing the oil up to operating temperature. The use of an inert gas, such as nitrogen, under positive pressure in the expansion tank is recommended at all times during operation. Under no circumstances should the hot oil come into contact with air.
  • Heat Transfer Oils 22, 32 and 46 also are recommended for use in open, liquidphase, forced circulation heat transfer systems where the maximum bulk oil temperature does not exceed 374oF (190oC).
  • Skin film temperature can be estimated at 50°F to 75°F above bulk oil temperature in properly designed and operating systems. If skin film temperatures rise higher than this, the service life of the oil may be shortened. Additionally sludge and coke may be deposited resulting in reduced efficiency of the system.
  • Some common heat transfer applications include:*Direct and indirect-fired hot oil heaters in asphalt plants*Hot corrugation and gluing*Dehydration*Molding and extrusion equipment*Plastic and wax coating equipment*Organic synthesis hot oil systems

Technical Details

Additional Details:

ISO Grade 32/46
Specific Gravity @ 60°F
@ 15.6°C (60°F) 0.867
@ 38°C (100°F) 0.853
@ 160°C (320°C) 0.775
@ 288°C (550°F) 0.693
@ 316°C (600°F) 0.675
Density, lbs/gal @ 60°F
@15.6°C (60°F) 7.22
@38°C (100°F) 7.10
@160°C (320°F) 6.45
@288°C (550°F) 5.77
@ 316°C (600°F) 5.62
Color, ASTM D1500 0.5
Flash Point (COC), °C (°F) , ASTM D92 222 (432)
Auto-ignition Temperature, ASTM E659, °C (°F) 348 (658)
Pour Point, °C (°F), ASTM D97 -15 (5)
Viscosity, ASTM D445
cSt @ 40°C 40.0
cSt @ 100°C 6.3
Viscosity Index, ASTM D2270 105
Acid Number, ASTM D974, mg KOH/g 0.02
Carbon Residue, ASTM D524, wt % 0.04
Oxidation Stability, RPVOT, ASTM D2272, minutes ---
Coeffiicient of Thermal Expansion, 1/°C (1/°F)
@ 15.6°C (60°F) 0.000737 (0.000409)
@38°C (100°F) 0.000749 (0.000416)
@160°C (320°F) 0.000825 (0.000458)
@ 316°C (600°F) 0.000946 (0.000526)
Specific Heat Capacity, Cp, Btu/lb-°F
@ 15.6°C (60°F) 0.445
@ 38°C (100°F) 0.465
@ 160°C (320°F) 0.571
@ 288°C (550°F) 0.683
@ 316°C (600°F)* 0.707
Thermal Conductivity, Btu/hr-ft-°F
@ 15.6°C (60°F) 0.0775
@ 38°C (100°F) 0.0765
@ 160°C (320°F) 0.0714
@ 288°C (550°F) 0.0660
@ 316°C (600°F)* 0.0648
Vapor Pressure, psia (kpa)
@ 15.6°C (60°F) 0.0017 (0.012)
@ 38°C (100°F) 0.0039 (0.027)
@ 160°C (320°F) 0.023 (0.16)
@ 288°C (550°F) 0.75 (5.17)
@ 316°C (600°F)* 1.05 (7.24)
*Values at 316°C (600°F) are provided for reference and engineering purposes.

Additional Details:

ISO Grade 22
Specific Gravity @ 60°F
@ 15.6°C (60°F) 0.854
@ 38°C (100°F) 0.840
@ 160°C (320°F) 0.762
@ 288°C (550°F) 0.680
@ 316°C (600°F)* 0.662
Density, lbs/gal @ 60°F
@ 15.6°C (60°F) 7.11
@ 38°C (100°F) 6.99
@ 160°C (320°F) 6.34
@ 288°C (550°F) 5.66
@ 316°C (600°F)* 5.52
Color, ASTM D1500 1.0
Flash Point (COC), °C (°F) , ASTM D1500 215 (419)
Auto-ignition Temperature, °C (°F), ASTM E659, 339 (642)
Pour Point, °C (°F), ASTM D97 -18 (0)
Viscosity , ASTM D445
cSt @ 40°C 22.5
cSt @ 100°C 4.43
Viscosity Index, ASTM D2270 106
Acid Number, mg KOH/g, ASTM D974 0.28
Carbon Residue, wt %, ASTM D524 0.17
Oxidation Stability, RPVOT, minutes, ASTM D2272 57
Coefficient of Thermal Expansion, 1/°C (1/°F)
@ 15.6°C (60°F) 0.000748 (0.000416)
@ 38°C (100°F) 0.000761 (0.000423)
@ 160°C (320°F) 0.000839 (0.000466)
@ 288°C (550°F) 0.000940 (0.000522)
@ 316°C (600°F)* 0.000965 (0.000536)
Specific Heat Capacity, Cp, Btu/lb-°F
@ 15.6°C (60°F) 0.449
@ 38°C (100°F) 0.469
@ 160°C (320°F) 0.575
@ 288°C (550°F) 0.688
@ 316°C (600°F)* 0.712
Thermal Conductivity, Btu/hr-ft-°F
@ 15.6°C (60°F) 0.0786
@ 38°C (100°F) 0.0777
@ 160°C (320°F) 0.0724
@ 288°C (550°F) 0.0670
@ 316°C (600°F)* 0.0658
Vapor Pressure, psia (kpa)
@ 15.6°C (60°F) 0.0077 (0.053)
@ 38°C (100°F) 0.014 (0.097)
@ 160°C (320°F) 0.095 (0.65)
@ 288°C (550°F) 1.48 (10.20)
@ 316°C (600°F)* 2.27 (15.65)
*Values at 316°C (600°F) are provided for reference and engineering purposes.

Additional Details:

Specific Gravity @ 60°F
@ 15.6°C (60°F) 0.864
@ 38°C (100°F) 0.850
@ 160°C (320°F) 0.772
@ 288°C (550°F) 0.690
@ 316°C (600°F)* 0.672
Density, lbs/gal @ 60°F
@ 15.6°C (60°F) 7.19
@ 38°C (100°F) 7.08
@ 160°C (320°F) 6.43
@ 288°C (550°F) 5.74
@ 316°C (600°F)* 5.60
Color, ASTM D1500 1.0
Flash Point (COC), °C (°F), ASTM D92 218 (424)
Auto-ignition Temperature, °C (°F), ASTM E659 342 (648)
Pour Point, °C (°F), ASTM D97 -42 (-44)
Viscosity, ASTM D445
cSt @ 40°C 31.7
cSt @ 100°C 5.5
Viscosity Index, ASTM D2270 110
Acid Number, mg KOH/g, ASTM D974 0.28
Carbon Residue, wt %, ASTM D524 0.17
Oxidation Stability, RPVOT, minutes 57
Coefficient of Thermal Expansion, 1/°C (1/°F)
@ 15.6°C (60°F) 0.000740 (0.000411)
@ 38°C (100°F) 0.000752 (0.000418)
@ 160°C (320°F) 0.000828 (0.000460)
@ 288°C (550°F) 0.000926 (0.000514)
@ 316°C (600°F)* 0.000950 (0.000528)
Specific Heat Capacity, Cp, Btu/lb-°F
@ 15.6°C (60°F) 0.446
@ 38°C (100°F) 0.466
@ 160°C (320°F) 0.572
@ 288°C (550°F) 0.685
@ 316°C (600°F)* 0.708
Thermal Conductivity, Btu/hr-ft-°F
@ 15.6°C (60°F) 0.0778
@ 38°C (100°F) 0.0768
@ 160°C (320°F) 0.0716
@ 288°C (550°F) 0.0663
@ 316°C (600°F)* 0.0651
Vapor Pressure, psia (kpa)
@ 15.6°C (60°F) 0.0015 (0.011)
@ 38°C (100°F) 0.0039 (0.027)
@ 160°C (320°F) 0.058 (0.400)
@ 288°C (550°F) 1.11 (7.65)
@ 316°C (600°F)* 2.22 (15.31)

Additional Details:

ISO Grade 46
Specific Gravity @ 60°F
@ 15.6°C (60°F) 0.871
@ 38°C (100°F) 0.857
@ 160°C (320°F) 0.779
@ 288°C (550°F) 0.697
@ 316°C (600°F)* 0.679
Density, lbs/gal @ 60°F
@ 15.6°C (60°F) 7.25
@ 38°C (100°F) 7.13
@ 160°C (320°F) 6.48
@ 288°C (550°F) 5.80
@ 316°C (600°F)* 5.66
Color, ASTM D1500 1.0
Flash Point (COC), °C (°F), ASTM D92 240 (464)
Auto-ignition Temperature, ASTM E659, °C (°F) 343 (649)
Pour Point, °C (°F), ASTM D97 -39 (-38)
Viscosity
cSt @ 40°C 46.0
cSt @ 100°C 6.8
Viscosity Index, ASTM D2270 102
Acid Number, ASTM D974, mg KOH/g 0.28
Carbon Residue, ASTM D524, wt % 0.17
Oxidation Stability, RPVOT, ASTM D2272, minutes 57
Coefficient of Thermal Expansion, 1/°C (1/°F)
@ 15.6°C (60°F) 0.000734 (0.000408)
@ 38°C (100°F) 0.000746 (0.000414)
@ 160°C (320°F) 0.000821 (0.000456)
@ 288°C (550°F) 0.000917 (0.000509)
@ 316°C (600°F)*
Specific Heat Capacity, Cp, Btu/lb-°F
@ 15.6°C (60°F) 0.444
@ 38°C (100°F) 0.464
@ 160°C (320°F) 0.570
@ 288°C (550°F) 0.681
@ 316°C (600°F)* 0.705
Thermal Conductivity, Btu/hr-ft-°F
@ 15.6°C (60°F) 0.0771
@ 38°C (100°F) 0.0762
@ 160°C (320°F) 0.0711
@ 288°C (550°F) 0.0657
@ 316°C (600°F)* 0.0645
Vapor Pressure, psia (kpa)
@ 15.6°C (60°F) 0.0039 (0.027)
@ 38°C (100°F) 0.0097 (0.067)
@ 160°C (320°F) 0.085 (0.59)
@ 288°C (550°F) 1.07 (7.38)
@ 316°C (600°F)* 1.84 (12.69)
*Values at 316°C (600°F) are provided for reference and engineering purposes.