Characteristics of Fuel Oil

Typical Characteristics of Fuel Oil
  Grade of Fuel Oil
Weight Percent #2 #4 #5 #6
Carbon 86.1–88.2 86.5–89.2 86.5–89.2 86.5–90.2
Hydrogen 11.8–13.9 10.6–13.0 10.5–12.0 9.5–12.0
Sulfur 0.05–1.0 0.2–2.0 0.5–3.0 8.51–7.68
Lbs per Gallon 7.39–6.87 8.04–7.30 8.10–7.68 8.51–7.68
Viscosity (Centistokes at 100°F) 1.9–3.0 10.5–65 65–200 260–750
Water & Sediment, Vol % 0–0.1 0–1.0 0.05–1.0 0.05–2.0
HHV (BTU/Lb) 19170–19750 18280–19400 18100–19020 17410–18990

 

Levels of Incomplete Combustion
  Natural Gas #2 Fuel Oil #6 Fuel Oil
Smoke Spot No. Should be no trace of Smoke (indicates combustion problem)
(No UL Limit)
Under #1 Good
#1 to #2 fair to Poor
over #2 Not Acceptable
(UL Limit is #2 Spot)
Under #2 Good
#2 to #3 Fair
#3 to #4 Poor
Over #4 Not Acceptable
(UL Limit is #4 Spot)
Carbon Monoxide (CO) Under 100 PPM Excellent
100 to 200 PPM Good
200 to 300 PPM Fair
300 to 400 PPM Poor
Over 400 PPM Not Acceptable
Under 50 PPM Good Under 100 PPM Good
Hydrocarbons Under 25 PPM Good
25 to50 PPM Fair
50 to 75 PPM Poor
Over 75 PPM Not Acceptable
   

 

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