34
Table 10. High Altitude Deration Chart for Natural Gas - High Heating Value
NATURAL GAS - HIGH HEATING VALUE
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
45,000
54,000
72,000
90,000
108,000
126,000
0 to 1,999 FT
49
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
2,000 to 2,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.9
3.2
3.2
3.2
3.2
3.2
MANIFOLD PRESSURE
3,000 to 3,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.8
3.0
3.0
3.0
3.0
3.0
MANIFOLD PRESSURE
4,000 to 4,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.6
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
5,000 to 5,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.5
2.7
2.7
2.7
2.7
2.7
MANIFOLD PRESSURE
6,000 to 6,999 FT
51
49
49
49
49
49
ORIFICE SIZE
3.3
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
7,000 to 7,999 FT
51
49
49
49
49
49
ORIFICE SIZE
3.0
3.3
3.3
3.3
3.3
3.3
MANIFOLD PRESSURE
8,000 to 8,999 FT
51
49
49
49
49
49
ORIFICE SIZE
2.8
3.0
3.0
3.0
3.0
3.0
MANIFOLD PRESSURE
9,000 to 9,999 FT
51
49
49
49
49
49
ORIFICE SIZE
2.6
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
Table 11. High Altitude Deration Chart for Natural Gas - Low Heating Value
NATURAL GAS - LOW HEATING VALUE
ALTITUDE ABOVE
SEA LEVEL
INPUT (BTU)
45,000
54,000
72,000
90,000
108,000
126,000
0 to 1,999 FT
49
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
2,000 to 2,999 FT
49
47
47
47
47
47
ORIFICE SIZE
3.5
3.5
3.5
3.5
3.5
3.5
MANIFOLD PRESSURE
3,000 to 3,999 FT
49
47
47
47
47
47
ORIFICE SIZE
3.1
3.3
3.3
3.3
3.3
3.3
MANIFOLD PRESSURE
4,000 to 4,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.9
3.1
3.1
3.1
3.1
3.1
MANIFOLD PRESSURE
5,000 to 5,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.7
2.9
2.9
2.9
2.9
2.9
MANIFOLD PRESSURE
6,000 to 6,999 FT
49
47
47
47
47
47
ORIFICE SIZE
2.6
2.8
2.8
2.8
2.8
2.8
MANIFOLD PRESSURE
7,000 to 7,999 FT
51
49
49
49
49
49
ORIFICE SIZE
3.4
3.4
3.4
3.4
3.4
3.4
MANIFOLD PRESSURE
8,000 to 8,999 FT
51
49
49
49
49
49
ORIFICE SIZE
3.1
3.2
3.2
3.2
3.2
3.2
MANIFOLD PRESSURE
9,000 to 9,999 FT
51
49
49
49
49
49
ORIFICE SIZE
2.9
2.9
2.9
2.9
2.9
2.9
MANIFOLD PRESSURE