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Custom Service and Combustion, Inc.

 

Boiler Room Units of Measure

1 Boiler Horsepower = 34.5 lb steam from & at 212 F

1 Boiler Horsepower = 33, 480 Btu/hr

1 gallon water = 8.34 pounds

1 cu ft water = 7.48 gallons

1 cu ft resin = 30,000 grains

1 grain hardness = 17.1 ppm

Psig (gauge) + 14.7 = Psia (absolute)

C = ( F-32 ) x 5/9      F = ( 9/5 x C ) + 32

Btu steam output = Btu input efficiency

1 psi = 27.7 inches water column

1 psi = 16 oz

 

Fuel Values

#6 oil = 150,000 Btu/gallon

#4 oil = 145,000 Btu/gallon

#2 oil = 140,000 Btu/gallon

Natural Gas = 1,000 Btu/cubic foot

1 Therm = 100,00 Btu

Coal = 12,000 Btu/pound

Wood (Dry) = 8,000 Btu/pound

1 kW electricity = 3,413 Btu

 

Saturated Steam

Psig   DegF   Btu             Psig   DegF   Btu

     1      212    1152             245     404    1202

     5      227    1156             295     420    1204

   10      239    1161             325     429    1205

   15      250    1164             355     437    1206

   30      274    1173             395     447    1206

   50      298    1180             452     460    1206

   80      324    1187             500     470    1205

 100      338    1191             550     490    1204

 120      350    1194             606     490    1204

 150      366    1197             665     500    1204

 170      375    1198             797     520    1199

 200      388    1200             947     540    1194

 

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