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Gas Requirements
Low Pressure Gas Pipe Sizes
NOTE: Sizing calculations based on National Fuel Gas
Code.
Gas Pipe Size Required for 1000 BTU Natural Gas (Standard Conditions) at Upstream Pressure— 7.0 ± 1.5
inches water column pressure [17.4 ± 4.0 mbar, 1.74 ± 0.37 kPa]
Equivalent Length
25 feet [7.6
m]
Gas Appli-
Based on 0.3 inches Water Column Pressure Drop for Length Given
ances Total
BTU/hr.
Sizes shown in Gas Pipe Nominal Size (NPT)
100,000
3/4
120,000
3/4
140,000
3/4
160,000
3/4
180,000
3/4
200,000
1
300,000
1
400,000
1-1/4
500,000
1-1/4
600,000
1-1/4
700,000
1-1/2
800,000
1-1/2
900,000
1-1/2
1,000,000
1-1/2
1,100,000
1-1/2
1,200,000
1-1/2
1,300,000
2
1,400,000
2
1,500,000
2
1,600,000
2
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50 feet
75 feet
[15.2 m]
[22.9 m]
3/4
3/4
3/4
1
1
1
1
1
1
1
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
2
1-1/2
2
2
2
2
2
2
2
2
2
2
2-1/2
2
2-1/2
2
2-1/2
2
2-1/2
Table 15 continues...
54
100 feet [30
125 feet [38
m]
m]
1
1
1
1
1
1
1
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
1-1/2
1-1/2
1-1/2
2
2
2
2
2
2
2
2
2
2-1/2
2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
150 feet [46
m]
1
1
1
1-1/4
1-1/4
1-1/4
1-1/2
1-1/2
2
2
2
2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
2-1/2
3
Part No. 70686701ENR4
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