Common Conversions

Here you will find a variety of educational and technical resources available from Nationwide Boiler Inc. This information is geared at assisting our clients through the process of selecting the right equipment for a variety of applications.

In addition, you can utilize our common conversions calculator to help you quickly convert units of measure, emissions, or boiler capacity, as well as our conversion calculators for saturated steam properties, superheated steam properties, and water properties. 

FIRETUBE BOILER SPECIFICATIONS

 The links below include detailed specifications based on the size of each boiler (fuel input at high fire and low fire, max steam production, steam temperature, output at high and low fire, and more).
47.5 HP 50 HP 100 HP
119 HP 125 HP 200 HP
250 HP 300 HP 350 HP
400 HP 475 HP 500 HP
600 HP 650 HP 700 HP
800 HP 900 HP 900 HP
1,000 HP 1,200 HP 1,500 HP

BOILER HORSEPOWER RELATIONSHIPS

1 BHP = 33,472 BTU/hr                1 BHP = 746 Watts
1 BHP = 34.5 lbs/hr steam            1 BTU/hr = 0.29 Watts
1 BHP = 0.07 GPM water              1 Watt = 3.45 BTU/hr = 9.7 kW/BHP       

 FUEL FLOW FOR       
100 HP BOILER

Natural Gas = 4,200 cfh                 #2 Oil = 30 gph
Propane = 1,750 cfh / 45 gph         #5 Oil = 28 gph
                                                       #6 Oil = 27.5 gph

 WATER, PRESSURE & FLOW

1 atm = 14.7 psi                                                                          PSIA = PSIG - 14.7
1 lb/sq.in. = 2.04 in. Hg. @ 62F = 2.31 ft. water @ 62F             g/cm2 = sp. gr. 
1 gpm = 0.143 cu.ft/min = 500 lb/hr x sp. gr.                              27.7 in. water = 1 psi 
1 cu.ft/min (cfm) = 448.8 gal/hr (gph)                                         2.31 ft. head = 1 psi
1 centipoise = 2.42 lb/ft.hr.
1 lb/ft.sec = 1488 centipoises = 3600 lb/ft.hr.

 WORK & POWER

1 BHP = 33,475 BTU/hr
1 BHP = 0.745 kW = 42.4 BTU/min = 2544 BTU/hr = 33000 ft.lb/min
1 kW = 1000 Watts (W) = 1.341 BHP = 56.88 BTU/min = 3413 BTU/hr
1 kW HR = 1000 Watt HR = 3413 BTU
1 BTU = 0.029 kW HR = 778 ft.lb. = 0.555 pcu (lb C)

METRIC
CONVERSION 
FACTORS

Steam Flow
1 HP = 34.5 lb/hr = 2200 tons/hr = 2.2 kg/hr (steam)   

Pressure
1 PSI = .0689 bar = .0703 kg/cm2 = 703.23 kg/m2  

Temperature
100F = 37.78C


View complete metric conversions guide for quick conversions.