31
LOCAL HEATING VALUES FOR NATURAL GAS
ALTITUDE ABOVE
SEA LEVEL
BTU PER CUBIC FOOT
650 700 750 800 850 900 950 1,000 1,050
2,000FT LOW LOW LOW LOW LOW LOW
HIGH HIGH HIGH
3,000FT LOW LOW LOW LOW LOW LOW
HIGH HIGH HIGH
4,000FT LOW LOW LOW LOW LOW
HIGH HIGH HIGH HIGH
5,000FT LOW LOW LOW LOW LOW
HIGH HIGH HIGH HIGH
6,000FT LOW LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH
7,000FT LOW LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH
8,000FT LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH
9,000FT LOW LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH
10,000FT LOW LOW
HIGH HIGH HIGH HIGH HIGH HIGH HIGH
Table10.NaturalGasHeatingValues
Table11.OricesforNaturalGas
HighHeatingValue
HIGH HEATING VALUE &
MANIFOLDPRESSURE=3.5in.W.C.
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
45,000 72,000
0to1,999FT 49 47
2,000to2,999FT 50 48
3,000to3,999FT 50 48
4,000to4,999FT 51 48
5,000to5,999FT 51 49
6,000to6,999FT 51 49
7,000to7,999FT 52 50
8,000to8,999FT 52 50
9,000to9,999FT 52 50
LOW HEATING VALUE &
MANIFOLDPRESSURE=3.5in.W.C.
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
45,000 72,000
0to1,999FT 49 47
2,000to2,999FT 49 47
3,000to3,999FT 49 47
4,000to4,999FT 50 47
5,000to5,999FT 50 47
6,000to6,999FT 50 48
7,000to7,999FT 51 48
8,000to8,999FT 51 49
9,000to9,999FT 51 49
Table12.OricesforNaturalGas
Low Heating Value
Table9.OricesforPropaneGas
ORIFICES FOR PROPANE GAS
MANIFOLDPRESSURE=10in.W.C.
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
45,000 72,000
0to1,999FT 57 56
2,000to2,999FT 57 56
3,000to3,999FT 57 56
4,000to4,999FT 57 56
5,000to5,999FT 58 56
6,000to6,999FT 59 57
7,000to7,999FT 59 57
8,000to8,999FT 60 57
9,000to9,999FT 61 57