Gas Requirements
48
Part No. 70476501ENR7
Gas Pipe Size Required for 1000 Btu Natural Gas — 0.64 Specific Gravity at 7 ± 1.5 inches
(17.4 ± 4 mbar, 1.74 ± 0.37 kPa) Water Column Pressure
Equivalent Length
25 feet
(7.63 m)
50 feet
(15.25 m)
75 feet
(22.88 m)
100 feet
(30.50 m)
125 feet
(38.13 m)
150 feet
(45.75 m)
GasAppliances
Total Btu/hr.
Based on 0.3 in. Water Column Pressure Drop for Length Given
Sizes shown in inches (mm)
1,300,000
2 (50.80)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
1,400,000
2 (50.80)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
1,500,000
2 (50.80)
2.5 (63.50)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
1,600,000
2 (50.80)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
1,700,000
2 (50.80)
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
1,800,000
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
1,900,000
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3 (76.20)
2,000,000
2.5 (63.50)
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3.5 (88.90)
2,200,000
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
2,400,000
2.5 (63.50)
3 (76.20)
3 (76.20)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
2,600,000
2.5 (63.50)
3 (76.20)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
2,800,000
2.5 (63.50)
3 (76.20)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
3,000,000
2.5 (63.50)
3 (76.20)
3.5 (88.90)
3.5 (88.90)
3.5 (88.90)
4 (101.60)
For L.P. Gas, correct the total Btu/hr by multiplying it by 0.6. The answer is the equivalent Btu on the above chart.
Table 5
High Altitude Orifice Sizing
Summary of Contents for LDR-900-S
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